Quality Steel Bailey Bridge & Modular Steel Bridge Factory

As an engineer from EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD., a professional steel structure bridge manufacturing company with years of experience in Bailey bridge design, production and installation, I have witnessed the critical role of high-strength bolts in ensuring the safety, stability and durability of Bailey bridge structures. Bailey bridges are widely used in emergency rescue, temporary transportation, construction sites and permanent low-cost transportation projects due to their modular design, quick assembly and strong adaptability to complex terrain. However, the reliability of the entire bridge structure largely depends on the quality and rational selection of high-strength bolts, which are the core connecting components that integrate individual steel modules into a stable load-bearing system. This article will elaborate on how to scientifically select high-strength bolts for Bailey bridge installation, covering the definition of high-strength bolts, their necessity in steel structure bridge installation, grade selection, key roles in Bailey bridge installation, influencing factors and common customer questions. 1. What Are High-Strength Bolts? High-strength bolts refer to specialized fasteners made of high-strength alloy steel, which undergo strict heat treatment processes (such as quenching and tempering) to achieve excellent mechanical properties, including high tensile strength, yield strength, hardness and toughness. Unlike ordinary carbon steel bolts (which have a tensile strength below 400MPa), high-strength bolts typically have a tensile strength of more than 800MPa, and their performance is strictly standardized by international and national standards such as AASHTO M325, EN 14399 and GB/T 1228. The core characteristics of high-strength bolts lie in their ability to bear large pre-tension and shear force, maintain stable connection performance under long-term dynamic loads, and resist corrosion, fatigue and other harsh service conditions. Common high-strength bolts used in bridge engineering include hexagon head bolts, torsion shear type high-strength bolts and large-diameter high-strength bolts, which are selected according to the specific connection form and load requirements of the bridge. 2. Why High-Strength Bolts Are Necessary for Steel Structure Bridge Installation Steel structure bridges, including Bailey bridges, are composed of multiple steel modules (such as beams, columns, trusses and connecting plates) that need to be firmly connected to form an integrated load-bearing structure. The connection effect directly determines the overall safety and service life of the bridge, so the selection of fasteners is particularly critical. Compared with ordinary bolts, high-strength bolts are indispensable in steel structure bridge installation for the following reasons: First, high-strength bolts can provide sufficient pre-tension. When installed, high-strength bolts are tightened to generate a large pre-tension, which clamps the connected steel plates tightly, so that the shear force between the connecting surfaces is transmitted through the friction force between the plates, rather than relying on the shear resistance of the bolt rod itself. This friction-type connection method greatly improves the bearing capacity and stability of the connection, and avoids the shear failure of the bolt rod under large loads, which is crucial for steel structure bridges that bear dynamic loads such as vehicle weight, wind load and seismic load. Second, high-strength bolts have excellent fatigue resistance. Steel structure bridges are in a state of dynamic load for a long time, and the connection parts are prone to fatigue damage due to repeated stress. High-strength bolts are made of high-quality alloy steel and processed by strict heat treatment, which can effectively resist fatigue crack initiation and expansion, ensuring that the connection remains stable under long-term service conditions and reducing the risk of bridge failure due to bolt fatigue. Third, high-strength bolts have good interchangeability and installation efficiency. The production of high-strength bolts strictly follows standard specifications, with uniform size and performance, which can be freely interchanged during installation, greatly improving the construction efficiency. Especially for Bailey bridges that require quick assembly, the use of high-strength bolts can shorten the installation cycle and ensure the timeliness of project completion. Finally, high-strength bolts can adapt to harsh service environments. Steel structure bridges are often exposed to outdoor environments, facing corrosion from rain, snow, humidity, salt spray (in coastal areas) and other factors. High-strength bolts can be treated with anti-corrosion measures such as hot-dip galvanizing, Dacromet coating and anti-rust paint, which can effectively improve their corrosion resistance and extend the service life of the bridge connection parts. 3. Selection of High-Strength Bolt Grades for Bailey Bridge Installation The grade of high-strength bolts is determined by their tensile strength and yield ratio, and the common grades used in Bailey bridge installation are 8.8, 10.9 and 12.9. The selection of bolt grades must be based on the load characteristics, connection form, service environment and design standards of the Bailey bridge to ensure that the bolts can match the bearing capacity of the bridge structure. As an experienced steel structure bridge manufacturer, EVERCROSS BRIDGE TECHNOLOGY usually recommends the following grade selection principles for customers: Grade 8.8 high-strength bolts: This grade of bolt has a tensile strength of 800MPa and a yield ratio of 0.8, which is suitable for non-critical secondary connections of Bailey bridges, such as the connection of auxiliary components (handrails, guardrails, temporary supports), light-load truss connections and non-main load-bearing parts. Grade 8.8 bolts have the advantages of low cost and stable performance, and are widely used in temporary Bailey bridge projects with small load requirements. Grade 10.9 high-strength bolts: With a tensile strength of 1040MPa and a yield ratio of 0.9, this grade is the most commonly used in Bailey bridge installation, suitable for main load-bearing connections, such as truss node connections, beam-column connections, and the connection between Bailey beams and supports. Most permanent and temporary Bailey bridges bear medium and large loads, and Grade 10.9 bolts can provide sufficient pre-tension and shear bearing capacity to ensure the overall stability of the bridge. At EVERCROSS, we use Grade 10.9 high-strength bolts as the standard configuration for most Bailey bridge main connections, which have been verified by a large number of engineering practices. Grade 12.9 high-strength bolts: This grade of bolt has a tensile strength of 1220MPa and a yield ratio of 0.9, which is a high-performance high-strength bolt, suitable for critical load-bearing connections of Bailey bridges under special conditions, such as large-span Bailey bridges, heavy-load Bailey bridges (bearing large engineering vehicles, equipment), and Bailey bridges used in seismic-prone areas or harsh environments (coastal salt spray, high humidity). Grade 12.9 bolts have higher strength and fatigue resistance, but their cost is relatively high. They are usually selected when the bridge design requires higher connection reliability, and need to be matched with corresponding high-strength nuts and washers to avoid uneven stress. It should be emphasized that the selection of high-strength bolt grades must not only consider the load requirements but also comply with the relevant design standards (such as AASHTO, EN 14399, GB/T 1228) and the technical requirements of the Bailey bridge. At the same time, the matching of bolts, nuts and washers must be ensured—high-strength bolts of different grades must be used with nuts and washers of the same grade to avoid premature failure due to uneven material performance. 4. The Critical Role of High-Strength Bolts in Bailey Bridge Installation Bailey bridges are modular steel structure bridges, and their installation process is to assemble prefabricated steel modules into a complete bridge structure through connecting components. High-strength bolts, as the core connecting fasteners, play an irreplaceable role in Bailey bridge installation, which can be analyzed from multiple angles: From the perspective of structural stability: The Bailey bridge’s load-bearing system is composed of multiple truss units and beam modules. High-strength bolts clamp these modules tightly through pre-tension, forming a rigid integral structure. Without high-strength bolts, the individual modules can only be loosely connected, which cannot bear the design load at all, and even collapse during installation or use. The pre-tension of high-strength bolts ensures the friction between the connected surfaces, transmits the shear force and tensile force between the modules, and maintains the overall stability of the bridge under static and dynamic loads. From the perspective of installation efficiency: Bailey bridges are widely used in emergency and temporary projects, requiring quick assembly and disassembly. High-strength bolts have the characteristics of standardization and interchangeability, and can be quickly installed and tightened with professional tools (such as torque wrenches, torsion shear wrenches), which greatly shortens the installation cycle. Compared with other connection methods (such as welding), the use of high-strength bolts avoids the need for on-site welding equipment and professional welders, reduces the difficulty of construction, and improves the efficiency of bridge installation. In emergency rescue scenarios, the quick assembly of Bailey bridges relying on high-strength bolts can win valuable time for disaster relief and transportation. From the perspective of structural safety and durability: Bailey bridges often bear complex loads such as vehicle weight, wind load, and temperature stress, and the connection parts are the weak links of the structure. High-strength bolts have excellent mechanical properties and fatigue resistance, which can resist the damage caused by long-term dynamic loads and ensure the safety of the bridge during service. At the same time, after anti-corrosion treatment, high-strength bolts can effectively resist the erosion of the external environment, reduce the occurrence of corrosion and rust, and extend the service life of the bridge. For permanent Bailey bridges, the selection of high-quality high-strength bolts is an important guarantee for the long-term safe operation of the bridge. From the perspective of maintainability: During the service life of the Bailey bridge, the connection parts need to be inspected and maintained regularly. High-strength bolts can be easily disassembled and replaced without damaging the steel modules, which is convenient for daily inspection, maintenance and replacement of damaged bolts. This maintainability not only reduces the maintenance cost of the bridge but also ensures that potential safety hazards can be eliminated in a timely manner, improving the reliability of the bridge structure. 5. Influencing Factors in the Selection of High-Strength Bolts for Bailey Bridge Installation When selecting high-strength bolts for Bailey bridge installation, it is not only necessary to determine the appropriate grade but also to comprehensively consider various influencing factors to ensure that the selected bolts are compatible with the bridge structure and service conditions. The main influencing factors include the following aspects: Load characteristics: The load borne by the Bailey bridge is the core factor determining the selection of high-strength bolts, including static load (such as the self-weight of the bridge, the weight of fixed equipment) and dynamic load (such as the weight of passing vehicles, wind load, seismic load). For bridges bearing large dynamic loads, high-grade high-strength bolts (such as Grade 12.9) with better fatigue resistance should be selected; for bridges bearing small static loads, Grade 8.8 or 10.9 bolts can be selected to reduce costs. Service environment: The service environment of the Bailey bridge directly affects the corrosion resistance requirements of high-strength bolts. For bridges used in coastal areas, high-humidity areas or areas with serious industrial pollution, high-strength bolts with advanced anti-corrosion treatment (such as hot-dip galvanizing + Dacromet coating) should be selected to prevent bolt corrosion and rust; for bridges used in dry and clean inland areas, ordinary anti-corrosion treated bolts (such as galvanizing) can be selected. Connection form: The connection form of the Bailey bridge (such as friction-type connection, shear-type connection) also affects the selection of high-strength bolts. Friction-type connections rely on the friction between the connected surfaces to transmit shear force, which requires high-strength bolts to provide sufficient pre-tension, so bolts with good toughness and high pre-tension capacity should be selected; shear-type connections rely on the shear resistance of the bolt rod to transmit shear force, which requires bolts with high shear strength and hardness. Design standards and specifications: The selection of high-strength bolts must comply with the relevant design standards and specifications of the project, such as AASHTO standards for projects in North America and Southeast Asia, Eurocode standards for projects in Europe and Africa, and GB standards for domestic projects in China. Different standards have different requirements for the performance, grade and installation of high-strength bolts, which must be strictly followed to ensure the compliance and safety of the bridge structure. Cost control: Under the premise of meeting the design requirements and safety standards, the cost of high-strength bolts should be reasonably controlled. High-grade bolts (such as Grade 12.9) have higher performance but higher cost, while low-grade bolts (such as Grade 8.8) have lower cost but limited performance. Therefore, it is necessary to balance the relationship between performance and cost, select the most cost-effective bolt grade and type according to the actual needs of the project. 6. Frequently Asked Questions (FAQs) About Steel Bridge Installation Connections In the process of communicating with customers about Bailey bridge projects, EVERCROSS BRIDGE TECHNOLOGY engineers often receive various questions about steel bridge installation connections. The following are the most common questions and professional answers to help customers better understand the selection and use of high-strength bolts in Bailey bridge installation: Q1: Can ordinary bolts be used instead of high-strength bolts in Bailey bridge installation to reduce costs? A1: No, ordinary bolts cannot be used instead of high-strength bolts. Ordinary bolts have low tensile strength, yield strength and fatigue resistance, and cannot provide sufficient pre-tension and shear bearing capacity. If ordinary bolts are used, the connection parts will be loose under the load of the Bailey bridge, and even shear failure, leading to bridge deformation, damage or collapse. Although high-strength bolts have higher costs, they are the core guarantee for the safety and stability of the Bailey bridge. Using ordinary bolts to replace high-strength bolts will bring serious potential safety hazards and even increase the overall cost due to subsequent maintenance and repair. Therefore, we strongly recommend that customers use high-strength bolts that meet the design standards. Q2: What is the difference between Grade 10.9 and Grade 12.9 high-strength bolts, and how to choose between them for Bailey bridge installation? A2: The main differences between Grade 10.9 and Grade 12.9 high-strength bolts lie in their mechanical properties and application scenarios. Grade 10.9 bolts have a tensile strength of 1040MPa and a yield ratio of 0.9, which can meet the load requirements of most Bailey bridge main connections and are the most commonly used grade. Grade 12.9 bolts have a higher tensile strength (1220MPa) and yield ratio (0.9), with better fatigue resistance and load-bearing capacity, suitable for large-span, heavy-load Bailey bridges or bridges used in harsh environments. The selection between the two depends on the design load, span and service environment of the Bailey bridge. For ordinary medium-span and medium-load Bailey bridges, Grade 10.9 bolts are sufficient; for special requirements such as heavy load and large span, Grade 12.9 bolts should be selected. Our engineers will provide professional grade selection suggestions according to the specific project design scheme. Q3: How to ensure the installation quality of high-strength bolts in Bailey bridge construction? A3: Ensuring the installation quality of high-strength bolts requires strict control from three aspects: pre-installation, during installation and post-installation. First, pre-installation: Check the quality of high-strength bolts (including batch certification, appearance, size), and ensure that the bolts, nuts and washers are matched; clean the connected surfaces to remove dirt, rust and oil, which affects the friction coefficient. Second, during installation: Use calibrated professional tools (torque wrench, torsion shear wrench) to tighten the bolts according to the specified torque or angle to ensure sufficient pre-tension; avoid over-tightening or under-tightening, which will affect the connection performance. Third, post-installation: Conduct 100% visual inspection of the bolts, check the tightening marks and exposed threads; randomly inspect the pre-tension of the bolts by ultrasonic testing or torque recheck to ensure that the installation quality meets the standards. In addition, our company will send professional engineers to provide on-site technical guidance if necessary, to ensure the correct installation of high-strength bolts. Q4: What is the service life of high-strength bolts in Bailey bridges, and do they need regular replacement? A4: The service life of high-strength bolts in Bailey bridges is usually 15-25 years, which depends on the anti-corrosion treatment, service environment and maintenance level. High-strength bolts treated with advanced anti-corrosion measures (such as hot-dip galvanizing + Dacromet coating) used in dry and clean environments can have a longer service life (up to 25 years); bolts used in coastal salt spray or high-humidity environments have a relatively shorter service life (15-20 years). Regular inspection and maintenance are required during use: conduct visual inspection every 1-2 years to check for corrosion, rust and loose bolts; conduct comprehensive inspection and torque recheck every 5 years. If bolts are found to be corroded, damaged or with insufficient pre-tension, they should be replaced in a timely manner to ensure the safety of the bridge. For permanent Bailey bridges, we recommend formulating a regular maintenance plan to extend the service life of high-strength bolts and the entire bridge structure. In conclusion, the selection of high-strength bolts is a key link in Bailey bridge installation, which is directly related to the safety, stability, durability and installation efficiency of the bridge. As a professional steel structure bridge manufacturing company, EVERCROSS BRIDGE TECHNOLOGY has rich experience in the selection and application of high-strength bolts, and can provide customers with personalized solutions according to the specific needs of each project. We always adhere to the principle of "quality first, safety first", and use high-quality high-strength bolts and scientific installation guidance to ensure that each Bailey bridge project meets the highest standards of safety and reliability.

As a professional integrated industrial and trade enterprise specializing in steel bridges, EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD. is dedicated to providing reliable portable steel bridge solutions for infrastructure construction in South America, Africa, Southeast Asia, and beyond. With our manufacturing base in Zhenjiang, Jiangsu Province, and a professional R&D and sales team in Shanghai, we integrate design, production, quality inspection, and export services to support global partners in overcoming infrastructure challenges. Let’s explore the definition and advantages of portable steel bridges, their critical role in post-flood traffic restoration in South Africa, our 2025 Liberia project milestone, strict quality control systems, green environmental advantages, and answers to common client inquiries. 1. What is a Portable Steel Bridge and Its Core Advantages? A portable steel bridge is a modular prefabricated structure composed of standardized steel components, including truss panels, transom beams, decking, and connecting fasteners. Designed for rapid deployment, transportation, and reusability, it serves as both a temporary emergency solution and a permanent infrastructure asset. Unlike traditional concrete bridges, its modular design eliminates the need for on-site casting and heavy construction equipment, making it ideal for remote areas and emergency scenarios. At EVERCROSS, our portable steel bridges boast the following core advantages: Rapid Deployment & Assembly: All components are factory-prefabricated with precision, enabling on-site assembly by a professional team within 3-7 days for standard spans. Basic equipment suffices for installation, and even unskilled local labor can be trained quickly, critical for emergency relief. Lightweight & High Load-Bearing Capacity: Crafted from high-strength steel, our bridges feature an excellent strength-to-weight ratio. They can withstand loads of 20-100 tons while remaining lightweight, facilitating transportation to remote areas via flatbed trucks or shipping containers, even in regions with poor road conditions. Strong Adaptability: The modular design supports flexible adjustments to span, width, and load capacity, adapting to diverse terrains such as rivers, valleys, and flood-prone areas. It requires minimal foundation work, reducing construction complexity in areas with weak soil. Durability & Low Maintenance: Undergoing professional anti-corrosion treatment (sandblasting derusting + epoxy zinc-rich primer + polyurethane topcoat), our bridges resist humidity, salt spray, and extreme temperatures. With a service life of over 30 years, they only require regular inspections for maintenance. Reusability & Cost-Effectiveness: Components can be disassembled, recycled, and reused in other projects, reducing long-term investment costs. Standardized production lowers manufacturing costs, making it a cost-efficient choice for developing countries. 2. EVERCROSS: Integrated Industrial & Trade Strength Our integrated industrial and trade model is the cornerstone of delivering high-quality portable steel bridges globally. Our Production workshop in Zhenjiang spans over 20,000 square meters, equipped with advanced CNC cutting machines, automatic welding lines, and anti-corrosion workshops. Adhering to strict production management standards, we ensure consistent quality across every component. In Shanghai, our R&D team of senior steel structure engineers specializes in optimizing bridge designs, conducting structural calculations, and customizing solutions to meet international and local standards. Complemented by a professional sales team familiar with import policies, design norms, and infrastructure needs of target markets, we provide one-stop services from project consultation and program design to logistics and on-site guidance, ensuring seamless project execution. 3. Portable Steel Bridges: Restoring Traffic in Flood-Affected South Africa Recent severe floods in South Africa have caused catastrophic damage to transportation infrastructure, with numerous bridges washed away, cutting off connectivity between urban and rural areas and disrupting local residents’ daily lives. In such emergency scenarios, portable steel bridges emerge as the most effective solution to restore traffic rapidly. EVERCROSS’s portable steel bridges can be deployed in three key phases to address the crisis. First, within 48 hours of receiving a request, we can prioritize production of core components in our Zhenjiang factory and arrange urgent sea and land transportation to South African ports. Second, our on-site technical team arrives simultaneously to guide local workers in assembly, leveraging the modular design to complete a 30-50m span bridge in 5-7 days—far faster than the months required for concrete bridge reconstruction. Third, the bridges’ lightweight design and minimal foundation needs avoid further environmental disturbance in flood-stricken areas, while their high load-bearing capacity supports emergency vehicles, supplies, and daily passenger traffic. By restoring critical transportation links quickly, portable steel bridges help deliver relief supplies to affected communities, reunite displaced families, and lay the foundation for post-disaster reconstruction, enabling local residents to resume normal life in the shortest possible time. 4. 2025 Liberia Project: A Milestone in West African Infrastructure Our 2025 project in Liberia—supplying a 130-meter-long portable steel bridge—showcases our professional capabilities and commitment to African infrastructure development. To meet the client’s needs for connecting remote rural areas with urban economic hubs, our R&D team provided multiple customized design schemes, including single-span and multi-span options, and delivered detailed structural calculation reports covering load-bearing capacity, seismic performance, and flood resistance. The project fully complies with Liberia’s Ministry of Public Works standards for low-volume roads and drainage structures, as well as international standards such as BS 5400 and AASHTO. Our design accounted for Liberia’s tropical climate and weak soil conditions, optimizing the bridge’s foundation structure and anti-corrosion performance. The successful completion of this project not only improved local transportation connectivity and promoted regional economic development but also established EVERCROSS’s reputation in West Africa, providing a blueprint for expanding our presence in the African market. This milestone demonstrates our ability to customize solutions for African countries, comply with local design norms, and contribute to sustainable infrastructure development on the continent. 5. Strict Quality Control & Compliance with International Standards Quality is paramount at EVERCROSS. We implement a rigorous quality control system throughout the production process, with special emphasis on compliance with Australian standards (AS 4100 and AS 5100.6) to ensure global competitiveness. After production, all components undergo comprehensive inspections, including: Material Performance Testing: Conducting tensile, compressive, and bending tests to ensure steel meets AS 4100 requirements (yield strength ≥300MPa, tensile strength ≥450MPa). Welding Quality Inspection: Using ultrasonic and radiographic testing to verify weld quality, ensuring weld penetration reaches over 80% of the thinner base material thickness as per AS 5100.6. Anti-Corrosion Performance Testing: Performing salt spray tests to validate coating durability, ensuring resistance to harsh environments. We provide clients with complete quality inspection reports compliant with Australian standards, including material certificates, welding inspection records, and structural calculation reports. Our team works closely with clients during acceptance, addressing any issues promptly to ensure on-time delivery of satisfactory products without delaying project completion. 6. Green & Sustainable Advantages EVERCROSS is committed to developing green, low-carbon portable steel bridges that align with global environmental standards. Our products feature the following sustainable characteristics: 100% Recyclable & Circular Usage: Made from fully recyclable high-strength steel, our bridges can be disassembled and reused in other projects at the end of their service life, reducing resource waste and promoting a circular economy. Low-Carbon Construction: Factory prefabrication reduces on-site construction waste by over 60% compared to traditional methods. We also use renewable energy in production, minimizing carbon emissions. Ecologically Friendly Installation: Minimal foundation excavation and rapid assembly reduce disturbance to local ecosystems, making our bridges suitable for ecologically sensitive areas. These features enable our products to meet green environmental standards worldwide, supporting clients in obtaining environmental assessment approvals for their projects. 7. FAQ: Common Inquiries from Global Clients Q1: Can your portable steel bridges withstand South Africa’s flood-prone environment and heavy rainfall? A1: Yes. Our bridges are designed with enhanced flood resistance, featuring elevated deck heights and corrosion-resistant coatings to withstand prolonged moisture. The modular structure’s high torsional stiffness prevents damage from flood scouring, and we can customize the foundation design for flood-prone areas to ensure stability. Our products have been validated in similar tropical flood environments across Africa. Q2: How do you ensure compliance with local design standards in African countries like Liberia? A2: Our R&D team is well-versed in African standards, including Liberia’s Ministry of Public Works manual for low-volume roads and South Africa’s municipal engineering norms. We also comply with international standards such as BS 5400 and AASHTO. We provide detailed design calculations and third-party certification to confirm compliance, and our engineers conduct on-site technical verification to align with local requirements. Q3: What is the lead time for delivering a portable steel bridge to Africa? A3: For a standard 50-80m span bridge, production takes 20-25 days. Sea transportation to African ports takes 25-35 days, and on-site assembly takes 5-7 days. The total lead time is 60-75 days. For emergency projects like post-flood restoration, we can expedite production and logistics to shorten lead time by 30%. Q4: Do you provide on-site technical support and after-sales service? A4: Yes. We send professional engineers to provide on-site assembly guidance and train local teams. We offer a 2-year warranty, covering free maintenance and component replacement for non-human damage. We also partner with local service providers in Africa to offer long-term maintenance support. Q5: How do your green features help our project meet environmental requirements? A5: Our recyclable steel materials, low-waste prefabrication, and low-carbon production process align with global green standards. We provide carbon emission reports and recyclability certificates to support environmental assessments. For African projects, our eco-friendly installation minimizes ecological disturbance, facilitating project approval from local environmental authorities.   In conclusion, portable steel bridges play a pivotal role in global infrastructure resilience, emergency relief, and sustainable development. EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD., with its integrated industrial and trade strength, professional technical capabilities, strict quality control system, and commitment to green sustainability, has established itself as a reliable partner for portable steel bridge solutions worldwide. Our successful 2025 Liberia project not only showcases our ability to meet local standards and customize solutions for African markets but also lays a solid foundation for expanding our footprint in South America, Southeast Asia, and beyond. Whether for post-disaster emergency restoration like in flood-affected South Africa, or long-term infrastructure construction in developing countries, our portable steel bridges deliver efficiency, durability, and environmental friendliness. We are dedicated to leveraging our manufacturing, R&D, and sales advantages to support global partners in building more connected, resilient, and sustainable communities. As we continue to deepen our presence in emerging markets, we look forward to forging mutually beneficial collaborations with clients across continents, contributing to the advancement of global infrastructure development.

As a professional integrated industrial and trade enterprise specializing in steel structure bridges, EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD. has been committed to providing high-quality steel bailey bridges for infrastructure construction in South America, Africa, Southeast Asia, and other regions. With our manufacturing base in Zhenjiang, Jiangsu Province, and a professional R&D and sales team in Shanghai, we integrate design, production, quality inspection, and export services to deliver reliable bridge solutions for global clients. Let’s elaborate on the definition and advantages of steel bailey bridges, showcases our corporate strength, highlights a key 2025 project, emphasizes our quality control system and compliance with international standards, and illustrates how our products meet Papua New Guinea’s (PNG) green environmental requirements, concluding with answers to common client inquiries. 1. What is a Steel Bailey Bridge and Its Core Advantages? A steel bailey bridge is a modular prefabricated steel bridge invented by British engineer Donald Coleman Bailey in 1938, characterized by standardized steel panels connected by bolts and fasteners. Its modular design enables rapid assembly and disassembly, making it a versatile solution for both temporary and permanent infrastructure projects. As a leading manufacturer, EVERCROSS optimizes the structure of steel bailey bridges to adapt to diverse global terrains and climate conditions, with the following core advantages: Rapid Assembly & High Efficiency: All components are prefabricated in our factory with standardized specifications, allowing on-site assembly without complex equipment. A 30-meter span steel bailey bridge can be installed by a professional team within 5-7 days, significantly shortening the construction period and meeting urgent infrastructure needs. Lightweight & Strong Load-Bearing Capacity: Made of high-strength steel, our steel bailey bridges feature an excellent strength-to-weight ratio. They can withstand heavy loads (up to 80 tons) while remaining lightweight, reducing foundation construction requirements and adapting to areas with weak soil conditions, such as PNG’s coastal plains and African river basins. Flexible Customization: The modular design supports flexible adjustments to span, load capacity, and deck type (pedestrian, vehicle, or dual-purpose). We can customize bridges with handicapped paths, stairs, or anti-slip decks according to client needs, meeting diverse project requirements. Durability & Corrosion Resistance: Our steel bailey bridges undergo professional anti-corrosion treatment (sandblasting derusting + epoxy zinc-rich primer + polyurethane topcoat), enabling them to resist harsh environments such as high humidity, salt spray, and extreme temperatures. Their service life can reach over 30 years with minimal maintenance. Cost-Effectiveness: The standardized production reduces manufacturing costs, while the rapid assembly minimizes on-site labor and equipment expenses. Additionally, the reusable components lower long-term investment costs, making them ideal for developing countries with limited infrastructure budgets. 2. EVERCROSS: Integrated Industrial & Trade Strength As an integrated industrial and trade enterprise, EVERCROSS boasts a complete industrial chain covering R&D, production, sales, and after-sales service, laying a solid foundation for global market expansion: Our manufacturing base in Zhenjiang, Jiangsu Province, covers an area of over 20,000 square meters, equipped with advanced production equipment such as CNC cutting machines, automatic welding lines, and anti-corrosion treatment workshops. The factory adheres to strict production management standards, ensuring consistent quality of each component. In Shanghai, our R&D team—composed of senior steel structure engineers—focuses on optimizing bridge design, improving structural stability, and developing environmentally friendly materials to meet international standards and local market needs. Complemented by a professional sales team, we provide one-stop services from project consultation and program design to logistics and on-site guidance. Our sales team is familiar with the import policies, design standards, and infrastructure needs of South American, African, and Southeast Asian countries, enabling us to deliver tailored solutions for clients and ensure smooth project progress. 3. 2025 Project Highlight: Showcasing Product Advantages A typical example of our product strength is the 30-meter steel bailey bridge project we undertook in 2025. This project, contracted by EVERCROSS, aims to connect a remote rural area with an urban center in a South American country, addressing the local transportation bottleneck and promoting regional economic development. The bridge is designed as a single-span steel bailey structure with a load capacity of 50 tons, capable of accommodating heavy-duty trucks and daily passenger traffic. To meet the client’s urgent demand for project completion before the rainy season, our team optimized the production and logistics process. The entire set of bridge components was prefabricated in our Zhenjiang factory within 20 days, and transported to the project site via sea and land routes. With the support of our on-site technical team, the local construction team completed assembly in just 6 days, realizing rapid deployment of the bridge. The project not only shortened the original construction cycle by 40% but also ensured structural stability, receiving high recognition from the client and local government. This project fully demonstrates EVERCROSS’s ability to deliver high-quality products efficiently, leveraging our modular design advantage and integrated industrial chain to solve the client’s urgent infrastructure needs without delaying the completion date. 4. Strict Quality Control & Compliance with International Standards Quality is the cornerstone of EVERCROSS’s development. To ensure each product meets client expectations and international standards, we implement a rigorous quality control system throughout the production process. After production, all steel bailey bridge components undergo multiple inspections, including material performance testing, dimensional accuracy measurement, welding quality inspection, and anti-corrosion effect detection. We adopt advanced non-destructive testing (NDT) methods in line with Australian standards, such as ultrasonic testing and magnetic particle testing, to detect internal and surface defects of components without damaging their structural integrity. We provide clients with comprehensive quality inspection reports compliant with Australian standards (AS 5100) and other international standards, including material certificates, welding inspection reports, and anti-corrosion performance test reports. Our team closely cooperates with clients in the inspection and acceptance process, addressing any issues promptly to ensure on-time delivery of satisfactory products and adherence to the project completion schedule. Our steel bailey bridges fully comply with various international and local design standards, including AASHTO (American), BS 5400 (British), EN 1993 (European), and local standards of target countries. This compliance ensures our products can be smoothly applied in global projects, eliminating technical barriers for clients. 5. Green & Sustainable Advantages for Papua New Guinea In response to the global call for sustainable development, EVERCROSS is committed to developing green and low-carbon steel bailey bridges, which are particularly suitable for PNG’s environmental requirements. Our products meet PNG’s green environmental standards with the following characteristics: 100% Recyclable & Circular Usage: Steel bailey bridges are made of fully recyclable high-strength steel. After the service life of a project or when project needs change, components can be disassembled, recycled, or reused in other infrastructure projects, realizing a circular economy and reducing resource waste. This aligns with PNG’s efforts to protect its ecological environment and promote sustainable development. Low-Carbon Construction: The prefabrication process in our factory reduces on-site construction waste by over 60% compared to traditional construction methods, minimizing environmental disruption to PNG’s fragile ecosystems. Additionally, we use renewable energy (solar and wind) in the production process, reducing carbon emissions and contributing to PNG’s carbon neutrality goals. Ecologically Friendly Installation: The lightweight design and rapid assembly of our steel bailey bridges require minimal foundation excavation, avoiding damage to local vegetation and soil. This is particularly important for PNG’s forested and ecologically sensitive areas, ensuring infrastructure construction coexists harmoniously with nature. 6. FAQ: Common Inquiries from Global Clients Q1: Can your steel bailey bridges adapt to PNG’s tropical rainforest climate and coastal salt spray environment? A1: Yes. Our steel bailey bridges undergo a three-layer anti-corrosion treatment, which effectively resists moisture, salt spray, and corrosion in PNG’s tropical climate. We also optimize the structure to enhance drainage performance, preventing water accumulation and structural damage during heavy rainfall. The bridges have been tested to maintain stable performance in PNG’s harsh environment for over 30 years. Q2: How long does it take to produce and deliver a steel bailey bridge to South America/Africa? A2: For a standard 30-meter span steel bailey bridge, the production cycle is 20-25 days. The sea transportation time to South American ports is about 30-40 days, and to African ports is 25-35 days. The total lead time from order confirmation to on-site delivery is 60-75 days. For urgent projects, we can expedite production and logistics to shorten the lead time by 30%. Q3: Do your products comply with local standards of our country, and can you provide relevant certification? A3: Absolutely. Our steel bailey bridges comply with international standards (AASHTO, BS 5400, EN 1993) and local standards of most countries. We will customize the design according to your country’s specific standards and provide third-party certification reports (SGS, BV) and quality inspection reports to ensure compliance. Our R&D team can also conduct technical verification to meet local regulatory requirements. Q4: Can you provide on-site technical support and after-sales service? A4: Yes. We send professional engineers to the project site to provide assembly guidance, technical training for local teams, and solve on-site problems. We offer a 2-year warranty for our steel bailey bridges, during which we provide free maintenance and component replacement for non-human damage. We also cooperate with local service providers in target countries to offer long-term maintenance services. Q5: How do your green and recyclable features help our project meet environmental assessment requirements? A5: Our steel bailey bridges’ recyclable materials and low-carbon construction process can help your project obtain environmental assessment approval. We provide relevant environmental certification materials, including carbon emission reports and recyclability certificates, to prove compliance with local green standards. For PNG projects, our products fully meet the country’s ecological protection requirements, minimizing environmental impact and facilitating project approval. In conclusion, steel bailey bridges, with their rapid assembly, durability, and cost-effectiveness, have become an indispensable solution for global infrastructure construction. EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD., relying on its integrated industrial and trade strength, strict quality control, and green sustainable solutions, is committed to providing reliable steel bailey bridges for clients in South America, Africa, Southeast Asia, and beyond. We look forward to cooperating with global partners to build a more connected and sustainable future through high-quality infrastructure solutions.

In the field of civil engineering and infrastructure development, high strength bolts play a crucial role in bridge construction. These fasteners are essential for maintaining structural integrity, effectively managing load distribution, and ensuring the safety of bridges—key components of transportation networks. This article explores the technical specifications, applications, performance advantages, and emerging trends related to high strength bolts in bridge engineering. What is High Strength Bolts? High strength bolts are engineered to support substantial loads while offering exceptional tensile strength and shear resistance. Typically crafted from alloy steel or carbon steel, these bolts undergo specialized heat treatment processes to enhance their mechanical characteristics. Common standards for high strength bolts include ASTM A325 and ASTM A490, which outline the chemical composition, mechanical properties, and acceptance criteria for these essential components. Key Technical Features of High Strength Bolts The performance of high strength bolts is defined by several key technical features: Tensile Strength: High strength bolts often exceed 120 ksi (kilopounds per square inch) in tensile strength, making them suitable for demanding applications. Yield Strength: With yield strengths typically ranging from 80 to 100 ksi, these bolts are vital for maintaining structural integrity under varying loads. Corrosion Resistance: Many high strength bolts are coated with materials like hot-dip galvanization or zinc plating to improve corrosion resistance, particularly in harsh environments. Thread Design: The threading of high strength bolts is frequently rolled rather than cut, which preserves the bolt's integrity and enhances load distribution. Applications in Bridge Construction of High Strength Bolts High strength bolts serve a variety of purposes in bridge construction, including: Steel Bridge Connections: In steel bridges, high strength bolts are critical for connecting girders, trusses, and other structural elements, ensuring robust load transfer and stability. Pre-tensioned Applications: Many contemporary bridge designs utilize pre-tensioned cables and beams, where high strength bolts are essential for maintaining tension and structural alignment. Maintenance and Repair: High strength bolts are also employed in the repair and retrofitting of existing bridges, enhancing load-bearing capacity and extending the lifespan of aging infrastructure. Performance Benefits of High Strength Bolts Incorporating high strength bolts into bridge construction yields several performance advantages: Enhanced Load-Bearing Capacity: High strength bolts can endure greater loads compared to standard bolts, making them ideal for heavy traffic conditions and dynamic loads. Reduced Structural Weight: By utilizing high strength bolts, engineers can design lighter bridge components without sacrificing safety, resulting in lower material costs and easier transportation. Improved Fatigue Resistance: The robust mechanical properties of high strength bolts enhance their ability to resist fatigue, ensuring longevity in structures subjected to cyclic loading. Fast Installation: High strength bolts allow for quick and efficient installation, reducing construction time and labor costs, especially beneficial in large-scale projects. Production Processes and Quality Assurance of High Strength Bolts The production of high strength bolts involves several critical processes to ensure their quality and performance: Material Selection: Choosing raw materials is crucial, with alloy steel and carbon steel being the most common due to their advantageous mechanical properties. Heat Treatment: Processes such as quenching and tempering are utilized to enhance the hardness and strength of the bolts, ensuring they meet specific performance standards. Quality Control: Comprehensive testing, including tensile and hardness tests, is conducted to guarantee the reliability and effectiveness of the bolts. High strength bolts are indispensable in bridge construction, offering exceptional performance and reliability. Their unique characteristics and advantages make them a preferred choice for engineers and contractors alike, ensuring that bridges maintain their structural integrity and safety standards. As technology advances, the continued development of high strength bolts will play a key role in the evolution of bridge engineering.

As a steel structure engineer at EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD., a leading integrated industrial and trade enterprise specializing in steel bridges, I have witnessed the growing significance of steel pedestrian bridges in urban infrastructure development across Southeast Asia, particularly in Malaysia. With our manufacturing base in Zhenjiang, Jiangsu Province, and R&D team in Shanghai, we have gained in-depth insights into Malaysia's unique geographical and urban construction needs. Let’s explore the definition of modular steel pedestrian bridges, their core advantages, applications in Malaysia's urban infrastructure, relevant international and local design standards, the urgent need for modular steel pedestrian bridges in Malaysia, and the competitive advantages of our company's products tailored for the Malaysian market. 1. What is a Steel Pedestrian Bridge? A steel pedestrian bridge, specifically the modular type that we focus on at EVERCROSS, is a pedestrian-specific crossing structure composed of prefabricated steel components. Unlike traditional concrete pedestrian bridges, it adopts a modular design concept, where key components such as load-bearing panels, floor beams, and decks are standardized and precision-manufactured in factories. These prefabricated modules are then transported to the construction site and assembled using bolts or pins, eliminating the need for on-site casting or complex welding. As a derivative of steel box girder technology, our modular steel pedestrian bridges inherit the structural stability of steel box girders while being optimized for pedestrian-specific load requirements, making them lightweight yet robust. 2. Core Advantages of Steel Pedestrian Bridges Modular steel pedestrian bridges stand out in urban construction due to their inherent advantages, which are particularly aligned with Malaysia's urban development needs: Lightweight and High Strength: Steel materials have an excellent strength-to-weight ratio. Compared with concrete pedestrian bridges, modular steel pedestrian bridges are significantly lighter, reducing the requirements for foundation construction and enabling installation in areas with weak soil conditions, such as Malaysia's coastal plains. A typical example is our PB100 modular steel pedestrian bridge exported to Mozambique, which was completed in February 2019. With a total length of 35.1m, this two-span bridge (equipped with a handicapped path and stairs) has a clear deck width of 1.2m. Its lightweight design allowed smooth installation even in the remote areas of Mozambique with limited construction conditions. Easy and Rapid Assembly: All components are prefabricated in factories, allowing on-site assembly to be completed quickly. A standard modular steel pedestrian bridge can be installed within 3-7 days by a professional team, minimizing disruptions to urban traffic and daily life. This is crucial for busy urban areas in Malaysia like Kuala Lumpur. Flexible Customization: The modular design supports flexible adjustments to span, width, and even appearance according to specific project needs. For example, it can be customized into curved shapes to match Malaysia's cultural and landscape characteristics, as seen in the Saloma Link bridge in Kuala Lumpur. Our PB100 bridge in Mozambique is also a testament to this advantage—we customized it with both a handicapped path and stairs to meet the local accessibility requirements, showcasing the flexibility of our modular design. Durable and Low Maintenance: High-quality steel materials combined with professional anti-corrosion treatments (such as sandblasting derusting and epoxy coatings) enable the bridges to resist moisture, salt spray, and other corrosive factors in Malaysia's tropical climate. Their service life can reach over 30 years, with only regular inspections required for maintenance. 3. Applications of Steel Pedestrian Bridges in Malaysia's Urban Infrastructure In recent years, steel pedestrian bridges have been widely applied in various urban infrastructure projects across Malaysia, playing an indispensable role in improving urban connectivity and quality of life: 3.1 Urban Road and Highway Crossings In major cities like Kuala Lumpur and Penang, steel pedestrian bridges are commonly used to connect sidewalks across busy highways and main roads. For instance, the Saloma Link, a 370-meter-long steel pedestrian and bicycle bridge in Kuala Lumpur, spans the Klang River and the AKLEH Elevated Highway, shortening the travel time between Kampung Baru and the city center from 30 minutes to 7 minutes. Such bridges not only ensure pedestrian safety but also reduce traffic congestion caused by pedestrian crossings at ground level. 3.2 Scenic Area and Cultural Heritage Connectivity Malaysia's booming tourism industry has driven the demand for steel pedestrian bridges in scenic areas. The Darul Hana Bridge in Kuching, Sarawak, is a typical example. This S-shaped steel cable-stayed pedestrian bridge connects the north and south banks of the Sarawak River, featuring a design that blends with local cultural elements and offers panoramic views of the city. Its lightweight and aesthetic design make it both a functional crossing and a tourist attraction. 3.3 Industrial Zone and Community Connections In industrial zones such as Iskandar Malaysia and Port Klang, steel pedestrian bridges are used to connect factory areas with employee dormitories or nearby communities, ensuring safe commutes for workers. Their rapid assembly capability allows for quick deployment to meet the urgent needs of industrial park development. 4. International and Malaysian Bridge Design Standards 4.1 International Bridge Design Standards Currently, there is no single international code exclusively for pedestrian bridges, but general international bridge design standards and guidelines provide important references. For example, the fib Bulletin No. 32 "Guidelines for the Design of Footbridges" summarizes design experiences and specifications from around the world, covering structural safety, load requirements, and accessibility considerations. Other widely adopted international standards include AASHTO (American Association of State Highway and Transportation Officials) specifications and BS 5400 (British Standards for Bridges), which outline detailed requirements for steel structure design, material performance, and load-bearing capacity. 4.2 Malaysian Bridge Design Standards Malaysia's bridge design standards have historically been based on British standards due to historical ties. The Public Works Department (JKR) of Malaysia primarily adopts limit state design theory, with reference to British standards such as BD 37/88 for load specifications. For steel pedestrian bridges, relevant requirements are specified in standards covering steel structures and pedestrian facilities, emphasizing adaptability to local tropical climates (such as anti-corrosion requirements) and traffic conditions. Additionally, Malaysia's Green Building Index (GBI) provides guidelines for sustainable and environmentally friendly infrastructure design, which are increasingly being integrated into bridge construction projects. 5. Why Malaysia Needs Modular Steel Pedestrian Bridges Urgently Malaysia's urbanization process and unique geographical and climatic conditions make the urgent adoption of modular steel pedestrian bridges a necessity: Addressing Urban Traffic Congestion: With rapid urbanization, cities like Kuala Lumpur are facing severe traffic congestion. Modular steel pedestrian bridges can be quickly installed to separate pedestrian and vehicle traffic, improving traffic flow efficiency and reducing accident risks. Their rapid construction minimizes the impact on existing traffic during installation. Adapting to Diverse Geographical Conditions: Malaysia features diverse terrain, including coastal areas, river basins, and hilly regions. Modular steel pedestrian bridges, with their lightweight design and large-span capability, can easily cross rivers, valleys, and coastal areas without the need for complex and costly foundation works, adapting well to Malaysia's geographical diversity. Resisting Tropical Climate Challenges: Malaysia's tropical rainforest climate, characterized by high temperature, high humidity, and frequent rainfall, causes rapid deterioration of concrete structures. Steel pedestrian bridges, with professional anti-corrosion treatments, can effectively resist moisture and salt spray corrosion, ensuring long-term stable operation, especially in coastal areas like Penang. Meeting Sustainable Development Goals: Malaysia is increasingly focusing on sustainable infrastructure development. Modular steel pedestrian bridges align with this goal due to their recyclable materials and low-carbon construction process, helping Malaysia achieve its environmental commitments. 6. Advantages of EVERCROSS's Modular Steel Pedestrian Bridges for Malaysia As an integrated industrial and trade enterprise with independent R&D and manufacturing capabilities, EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD. offers tailored solutions for Malaysia's market, with core advantages in green and sustainable development: Green, Low-Carbon, and Recyclable: Our modular steel pedestrian bridges are made of 100% recyclable high-strength steel, enabling full recycling or reuse of components at the end of their service life, realizing a circular economy. The prefabrication process in our Zhenjiang factory reduces on-site construction waste by over 60% compared to traditional construction methods. Additionally, we use renewable energy (solar and wind) in the production process, significantly reducing carbon emissions and complying with Malaysia's green infrastructure requirements. Compliance with Local and International Standards: Our R&D team in Shanghai is well-versed in Malaysia's JKR standards, British BS 5400, and international AASHTO standards. All products undergo strict quality control and provide third-party inspection reports (SGS, BV) to ensure full compliance with Malaysian regulations. We also optimize the design for Malaysia's tropical climate, enhancing anti-corrosion performance and structural stability. Efficient industry and trade Integration Advantages: With our own manufacturing base in Zhenjiang, we can control production costs and ensure product quality. We have established a mature logistics network to deliver prefabricated modules efficiently to Malaysian ports (such as Port Klang and Penang Port). Our professional team provides on-site installation guidance, technical training, and a 2-year after-sales service, with engineers fluent in English and Malay to respond to customer needs promptly. Customizable Design: We offer customized designs based on Malaysia's specific project requirements and cultural characteristics. For example, we can replicate the aesthetic design of local cultural elements (like the Sirih Junjung in Saloma Link) into the bridge structure, ensuring the bridge integrates harmoniously with the local environment. 7. FAQ: Common Inquiries from Malaysian Clients Q1: Can your modular steel pedestrian bridges adapt to Malaysia's coastal salt spray environment? A1: Yes. We use high-quality weather-resistant steel and a three-layer anti-corrosion treatment (sandblasting derusting + epoxy zinc-rich primer + polyurethane topcoat) to effectively resist salt spray corrosion. Our products have been tested to withstand Malaysia's coastal climate, with a corrosion resistance guarantee of over 30 years. We also provide regular anti-corrosion maintenance guidance. Q2: How long does the installation of your modular steel pedestrian bridge take in urban areas of Malaysia? A2: For a standard 20-30m span modular steel pedestrian bridge, the on-site assembly can be completed within 3-7 days by our professional team. The prefabricated design minimizes on-site construction time and traffic disruption, which is particularly suitable for busy urban areas like Kuala Lumpur. Q3: Do your products comply with Malaysia's GBI green building standards? A3: Absolutely. Our modular steel pedestrian bridges meet all core requirements of Malaysia's GBI standards, including low carbon emissions, recyclable materials, and minimal environmental impact. We can provide relevant certification materials to support your project's green rating application. Q4: Can you provide customized designs that incorporate Malaysian cultural elements? A4: Yes. Our R&D team can customize the bridge's shape, color, and decorative details according to Malaysian cultural elements (such as Sirih Junjung, traditional patterns, etc.). The Saloma Link in Kuala Lumpur is a good reference, and we can integrate similar cultural elements into the design to enhance the bridge's local adaptability and aesthetic value. Q5: What are the payment terms and after-sales services for exports to Malaysia? A5: We offer flexible payment terms suitable for Malaysian clients, such as 30% advance payment, 50% upon shipment, and 20% after project acceptance. We accept L/C and bank transfers compliant with Malaysian banking regulations. Additionally, we provide a 2-year warranty, on-site installation guidance, and technical training. We also cooperate with local service providers in Malaysia to offer long-term maintenance services. In conclusion, modular steel pedestrian bridges play a vital role in Malaysia's urban infrastructure development, addressing traffic congestion, adapting to diverse geographical conditions, and meeting sustainable development goals. EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD. is committed to providing high-quality, green, and customizable modular steel pedestrian bridge solutions for Malaysia, leveraging our industry and trade integration advantages, professional R&D capabilities, and in-depth understanding of local needs. We look forward to collaborating with Malaysian partners to build a safer, more connected, and sustainable urban environment.

Shanghai, China – July 31, 2025 – A vital new transportation link has been successfully commissioned in Ethiopia with the completion of a 40-meter Bailey bridge. Constructed by EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD., this critical infrastructure project directly addresses longstanding mobility challenges for local communities, significantly reducing travel times and enhancing safety. What is a Bailey Bridge?The Bailey bridge is a renowned, highly versatile type of portable, prefabricated truss bridge. Its genius lies in its design: Modularity: It's constructed from standardized, interchangeable steel panels, pins, and transoms (cross-beams). These components are relatively lightweight and easy to transport. Rapid Assembly: Sections can be easily lifted into place manually or with light machinery, allowing for incredibly fast construction compared to traditional bridges, often in days or weeks. Strength & Adaptability: Despite its prefabricated nature, the Bailey bridge is remarkably strong and can be configured into various lengths and load capacities by adding more panels and supports. It can also be strengthened ("double-story" or "triple-story") for heavier loads. Proven History: Originally designed by Sir Donald Bailey for military use during World War II, its robustness, simplicity, and speed of deployment made it invaluable. This legacy continues in civilian applications worldwide, particularly in disaster relief and rural infrastructure development where speed and cost-effectiveness are paramount.

We are thrilled to announce a significant milestone in our international expansion! EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD. has been officially awarded the contract for the Telefomin 16km Ring Road Project in the West Sepik Province of Papua New Guinea. This prestigious project involves the design, supply, and installation of five (5) modern, two-lane Bailey Bridges, marking a major achievement as we solidify our presence in the demanding Oceania market, specifically targeting projects compliant with the rigorous AS/NZS (Australian/New Zealand Standards) series. This victory underscores our expertise in delivering critical infrastructure solutions that meet the highest international benchmarks. The Telefomin Road project is vital for connecting communities and fostering development in a remote region of PNG. The Bailey Bridge Advantage: The Bailey Bridge system is a cornerstone of robust, rapidly deployable infrastructure. These are prefabricated, modular steel truss bridges, renowned for their: Strength & Durability: Engineered to handle substantial loads, including heavy vehicles and challenging environmental conditions common in PNG. Rapid Construction: Their modular design allows for swift assembly using relatively simple equipment and local labor, minimizing disruption and accelerating project timelines significantly compared to traditional bridge building. Versatility & Adaptability: Easily configured to span various distances and fit diverse terrains – ideal for the demanding landscapes of West Sepik Province. Cost-Effectiveness: Offering a reliable and efficient solution, maximizing value for critical infrastructure investment. Proven Compliance: Our bridges will be meticulously designed and constructed to fully comply with AS/NZS 5100.6 (Bridge Design - Steel and Composite Construction) and other relevant AS/NZS standards, ensuring long-term safety, performance, and regulatory acceptance. Transforming Lives in West Sepik: The construction of these five new two-lane Bailey Bridges along the Telefomin Road is far more than just an infrastructure project; it's a catalyst for profound positive change for the local communities: Unlocking Vital Access: Replacing unreliable or non-existent river crossings, these bridges will provide year-round, all-weather access between Telefomin and surrounding villages. This eliminates dangerous river fording, especially critical during the rainy season. Enhancing Safety: Safe, reliable bridges drastically reduce the risks associated with crossing flooded rivers or using unstable makeshift crossings, protecting lives. Boosting Economic Opportunity: Reliable transport links enable farmers to get goods to markets efficiently, allow businesses to receive supplies, attract investment, and create local jobs. Economic activity will flourish. Improving Healthcare Access: Consistent access means residents can reliably reach clinics and hospitals for essential medical care, vaccinations, and emergencies, significantly improving health outcomes. Empowering Education: Children will no longer miss school due to impassable rivers. Teachers and supplies can reach remote schools consistently, enhancing educational opportunities. Strengthening Community Ties: Easier travel fosters stronger social connections between villages and families, promoting cultural exchange and community resilience. A Testament to Expertise and Commitment: Winning this competitive tender against AS/NZS standards highlights EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD. 's technical prowess, commitment to quality, and deep understanding of the infrastructure needs within the Oceania region. We are proud to contribute our world-class Bailey Bridge solutions to such a transformative project. We extend our sincere gratitude to the authorities in Papua New Guinea for their trust and look forward to a highly successful partnership in delivering this vital infrastructure. This project exemplifies our dedication to "Building Connections, Empowering Communities" worldwide. Here's to building a brighter, more connected future for the people of Telefomin and West Sepik Province! For more information on our international projects and Bailey Bridge solutions, please visit our website or contact our international division. EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD. - Building Global Infrastructure Excellence

In the realm of civil infrastructure, ensuring the safety, durability, and serviceability of bridges is paramount. For highway bridges across the United States, the definitive guide governing their design and construction is the AASHTO LRFD Bridge Design Specifications. Developed and maintained by the American Association of State Highway and Transportation Officials (AASHTO), this comprehensive document represents the culmination of decades of research, testing, and practical engineering experience, establishing itself as the national standard for highway bridge design. What Are the AASHTO LRFD Bridge Design Specifications? Fundamentally, the AASHTO LRFD Specifications are a codified set of rules, procedures, and methodologies used by structural engineers to design new highway bridges and evaluate existing ones. The acronym "LRFD" stands for Load and Resistance Factor Design, which signifies a fundamental shift from older design philosophies like Allowable Stress Design (ASD) or Load Factor Design (LFD). LRFD is a probability-based approach. It explicitly acknowledges the inherent uncertainties in both the loads a bridge must carry throughout its lifetime (traffic, wind, earthquakes, temperature changes, etc.) and the resistance (strength) of the materials (concrete, steel, soil, etc.) used to build it. Instead of applying a single, global safety factor to reduce material strength (as in ASD), LRFD employs distinct Load Factors (γ) and Resistance Factors (φ). Load Factors (γ): These are multipliers (greater than 1.0) applied to the various types of loads a bridge might experience. They account for the possibility that actual loads could be higher than predicted nominal values, that multiple severe loads might occur simultaneously, and the potential consequences of failure. More variable and less predictable loads, or those with higher consequences of underestimation, receive higher load factors. Resistance Factors (φ): These are multipliers (less than or equal to 1.0) applied to the nominal strength of a structural component (e.g., a beam, a column, a pile). They account for uncertainties in material properties, workmanship, dimensions, and the accuracy of the predictive equations used to calculate strength. Factors are calibrated based on reliability theory and historical performance data for different materials and failure modes. The core design requirement in LRFD is expressed as: Factored Resistance ≥ Factored Load Effects. In essence, the strength of the bridge component, reduced by its resistance factor, must be greater than or equal to the combined effect of all applied loads, each amplified by its respective load factor. This approach allows for a more rational and consistent level of safety across different bridge types, materials, and load combinations compared to older methods. Primary Domain of Application: Highway Bridges The AASHTO LRFD Specifications are specifically tailored for the design, evaluation, and rehabilitation of highway bridges. This encompasses a vast array of structures carrying vehicular traffic over obstacles like rivers, roads, railways, or valleys. Key applications include: New Bridge Design: This is the primary application. The specifications provide the framework for designing all structural elements of a highway bridge, including: Superstructure: Decks, girders (steel, concrete, prestressed concrete, composite), trusses, bearings, expansion joints. Substructure: Piers, abutments, columns, pier caps, wing walls. Foundations: Spread footings, driven piles (steel, concrete, timber), drilled shafts, retaining walls integral to the bridge. Appurtenances: Railings, barriers, drainage systems (as they relate to structural loads). Bridge Evaluation and Rating: Engineers use the LRFD principles and load factors to assess the load-carrying capacity (rating) of existing bridges, determining if they can safely carry current legal loads or require posting, repair, or replacement. Bridge Rehabilitation and Strengthening: When modifying or upgrading existing bridges, the specifications guide engineers in designing interventions that bring the structure into compliance with current standards. Seismic Design: While sometimes detailed in companion guides (like the AASHTO Guide Specifications for LRFD Seismic Bridge Design), the core LRFD specifications integrate seismic loads and provide fundamental requirements for designing bridges to resist earthquake forces, particularly in designated seismic zones. Design for Other Loads: The specifications comprehensively address numerous other load types and effects critical to bridge performance, including wind loads, vehicular collision forces (on piers or rails), water and ice loads, temperature effects, creep, shrinkage, and settlement. The specifications are intended for public highway bridges on roads classified as "Highway Functional Classifications" Arterial, Collector, and Local. While they form the basis, specialized structures like movable bridges or bridges carrying exceptionally heavy loads might require additional or modified criteria. Distinguishing Characteristics of the AASHTO LRFD Specifications Several key characteristics define the AASHTO LRFD Specifications and contribute to their status as the modern standard: Reliability-Based Calibration: This is the cornerstone. The load and resistance factors are not arbitrary; they are statistically calibrated using probability theory and extensive databases of material tests, load measurements, and structural performance. This aims to achieve a consistent, quantifiable target level of safety (reliability index, β) across different components and limit states. A higher reliability index is targeted for failure modes with more severe consequences. Explicit Treatment of Multiple Limit States: Design isn't just about preventing collapse. LRFD requires checking several distinct Limit States, each representing a condition where the bridge ceases to perform its intended function: Strength Limit States: Prevent catastrophic failure (e.g., yielding, buckling, crushing, fracture). This is the primary state using the core φR ≥ γQ equation. Service Limit States: Ensure functionality and comfort under regular service loads (e.g., excessive deflection causing pavement damage, cracking in concrete impairing durability or appearance, vibration causing user discomfort). Extreme Event Limit States: Ensure survival and limited serviceability during rare, intense events like major earthquakes, significant vessel collisions, or design-level floods. Lower reliability indices are often accepted here due to the event's rarity. Fatigue and Fracture Limit State: Prevent failure due to repeated stress cycles over the bridge's lifespan, crucial for steel components. Integrated Load Combinations: The specifications provide explicit combinations of loads (e.g., dead load + live load + wind load; dead load + live load + earthquake load) with specific load factors for each combination. This recognizes that different loads acting together have different probabilities of occurrence and potential interactions. The most critical combination dictates the design. Material-Specific Provisions: While the core LRFD philosophy is universal, the specifications contain detailed chapters dedicated to the design of structures using specific materials (e.g., Concrete Structures, Steel Structures, Aluminum Structures, Wood Structures). These chapters provide material-specific equations, resistance factors, and detailing rules. Focus on System Behavior: While components are designed individually, the specifications increasingly emphasize understanding and accounting for system behavior, load paths, and redundancy. A redundant structure, where failure of one component doesn't lead to immediate collapse, is inherently safer. Evolution and Refinement: The LRFD specifications are not static. AASHTO updates them regularly (typically every 4-6 years) through a rigorous consensus process involving state DOTs, industry experts, researchers, and the FHWA. This incorporates the latest research findings (e.g., improved understanding of concrete behavior, refined seismic design approaches, new materials like HPS steel or UHPC), addresses lessons learned from bridge performance (including failures), and responds to evolving needs like accommodating heavier trucks or improving resilience to extreme events. Comprehensiveness: The document covers an immense scope, from fundamental design philosophy and load definitions to intricate details of component design, foundation analysis, seismic provisions, geometric requirements, and construction considerations. It strives to be a self-contained manual for highway bridge design. National Standardization: By providing a unified, scientifically grounded approach, the AASHTO LRFD Specifications ensure a consistent level of safety, performance, and design practice for highway bridges across all 50 states. This facilitates interstate commerce and simplifies the design review process.   The AASHTO LRFD Bridge Design Specifications represent the state-of-the-art in highway bridge engineering practice in the United States. Moving decisively beyond older deterministic methods, its core LRFD philosophy embraces probability and reliability theory to achieve a more rational, consistent, and quantifiable level of safety. Its comprehensive scope, covering everything from fundamental principles to intricate material-specific design rules for all major bridge components under a wide array of loads and limit states, makes it the indispensable reference for designing new highway bridges, evaluating existing ones, and planning rehabilitations. The specifications' defining characteristics – reliability-based calibration, explicit limit state checks, integrated load combinations, and a commitment to continuous evolution through research and practical experience – ensure that it remains a robust, living document, safeguarding the integrity and longevity of the nation's critical highway bridge infrastructure for decades to come. For any structural engineer engaged in U.S. highway bridge work, mastery of the AASHTO LRFD Specifications is not just beneficial; it is fundamental.

[Shanghai, China] – [July,7th,2025] – EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD. is proud to announce a significant milestone in its global expansion strategy with the successful award of the ANE Steel Bridge Project contract in Mozambique. This prestigious project signifies a major entry and commitment to the growing infrastructure market in Africa. The project involves the design, supply, and construction of 45 steel bridge structures with spans ranging from 30 to 60 meters each, culminating in a total combined bridge length of 1,950 meters. These bridges will play a crucial role in enhancing regional connectivity and transportation infrastructure within Mozambique. A key differentiator and testament to EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO., LTD.'s engineering excellence and commitment to international standards is that the bridge designs will fully comply with the rigorous AASHTO LRFD (Load and Resistance Factor Design) Bridge Design Specifications. This American Association of State Highway and Transportation Officials standard is recognized globally as a leading benchmark for modern, safe, and efficient bridge design, ensuring the structures meet the highest levels of safety, durability, and performance for Mozambique's needs.  

EVERCROSS Bridge Technology (Shanghai) Co., Ltd.  June 5, 2025 Recently, the  Bailey Bridge of the water supply pipeline project of Construction of Pipeline for Sigatoka Water Coverage Extension Projects of Fiji undertaken by our company (EVERCROSS Bridge Technology (Shanghai) Co., Ltd.) has successfully passed the final acceptance and has been well received by the construction unit and users. The project is 24 meters long and is designed and processed in accordance with AS/NZS standards. It is specially used for arranging pipelines and uses special pipe clamps. This marks another important milestone for our company in the Fiji market and has achieved decisive success, which has written a strong and colorful stroke for deepening regional cooperation in the South Pacific and enhancing the company's international brand influence.