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The Tao'er River Grand Bridge on G228 in Binzhou is a remarkable infrastructure project. It is a significant part of the transportation network and represents advanced engineering achievements.   Key Specifications of composite girder bridge   This bridge has an impressive length of 4,334 meters. Its main span reaches a remarkable 338 meters. The bridge is a hybrid - girder structure. The main bridge is designed as a 128 + 338+ 128 - meter hybrid - girder continuous rigid - frame bridge.   Construction Highlights of composite girder bridge   The construction process of this bridge was filled with technical challenges. For the closure of the bridge, the steel box girder of the closure section is 127 meters long, with a single - width of 12.5 meters and a weight of 1,200 tons. Given the lack of domestic experience in inland hoisting of such long steel box girders, and considering the complex surrounding environment of the bridge site and frequent strong winds, the construction team carried out meticulous planning in advance. They conducted numerous sand - table simulations of the construction process. They chose the time when the tidal current velocity was at its minimum and used a 10,000 - ton transport ship to move the steel box girder to the position right under the bridge - deck crane. The team also adjusted the ship's anchor chain to achieve precise positioning.   Moreover, they utilized a self - developed intelligent hanging and lifting integrated machine to control eight 350 - ton jacks for synchronous lifting at a speed of 6 meters per hour. The on - site staff monitored the operation in real - time through data such as the lifting speed and oil pressure of the jacks, ensuring that each lifting stroke was within an error range of plus or minus 5 percent, which guaranteed the accurate closure of the steel box girder.   Importance and Impact of composite girder bridge   Once completed, the bridge has had a far - reaching impact. It has significantly shortened the travel time from 90 minutes to 5 minutes for commuters crossing the Tao'er River. This has greatly enhanced the transportation efficiency of the region.   The G228 project in Binzhou, of which this bridge is a part, is a high - grade coastal highway that combines coastal defense and coastal development functions. The bridge's completion has improved the road - network layout in the northern coastal area of Binzhou. It provides a strong transportation guarantee for the development of the Bohai Rim and the Yellow River Basin regions and contributes to the high - quality development of the Yellow River Delta.

What ‘s the Development History and Future Prospects of Steel Box Girder Bridge? Steel box girder bridges have emerged as a significant structural form in the field of modern bridge engineering, with a development history full of technological advancements and innovation.   Early Origins and Initial Applications The concept of the steel box girder bridge can be traced back to the mid - 20th century. In the post - World War II era, there was a growing demand for efficient and durable bridge structures to support the rapid development of transportation infrastructure. The first steel box girder bridges were relatively simple in design. They were mainly used for medium - span bridges, typically with spans ranging from 50 to 150 meters. These early bridges utilized basic steel - making techniques and simple construction methods. For example, the initial steel box girders were often fabricated from rolled steel plates, which were then welded together in a relatively straightforward manner.   Technological Advancements and Expansion in Span As time went on, technological breakthroughs significantly influenced the development of steel box girder bridges. In the 1960s and 1970s, the development of high - strength steels provided the impetus for longer - span steel box girder bridges. Engineers could now design bridges with larger spans, reaching up to 300 meters or more. The construction techniques also evolved. The use of pre - fabricated segments became more common. These segments were manufactured in factories under controlled conditions and then transported to the construction site for assembly. This method improved the quality of the bridge components and reduced construction time on - site. Another important development was the introduction of orthotropic decks in steel box girder bridges. The orthotropic deck, consisting of a thin steel plate stiffened by ribs, provided a more efficient load - bearing system. It distributed the loads more evenly across the bridge deck, enabling the bridge to carry heavier traffic loads. This innovation was a major step forward in the development of steel box girder bridges, making them more suitable for high - volume traffic and long - span applications.   Global Proliferation and Notable Examples In the late 20th century and early 21st century, steel box girder bridges proliferated globally. In Asia, for instance, countries like China and Japan built numerous steel box girder bridges as part of their extensive infrastructure development. The Sutong Yangtze River Bridge in China, completed in 2008, is a remarkable example. With a main span of 1088 meters, it is one of the longest - span cable - stayed bridges with a steel box girder deck. In Europe, the Normandy Bridge in France, opened in 1995, also features a large - span steel box girder structure, with a main span of 856 meters. These bridges not only demonstrated the engineering prowess of their respective countries but also set new standards for steel box girder bridge design and construction.   Future Development Prospects Intelligent Monitoring and Maintenance Intelligent monitoring systems will become more prevalent in steel box girder bridges. Sensors will be installed on the bridge structure to continuously monitor its health, including stress levels, vibration, and corrosion. This real - time data will help in predicting potential problems and scheduling timely maintenance, thereby extending the lifespan of the bridge and ensuring its safety. In conclusion, the steel box girder bridge has come a long way from its humble beginnings, and with continuous technological innovation and a focus on sustainability, its future looks promising, with the potential to further transform the field of bridge engineering. Sustainable and Green Design In the future, the focus will be on sustainable and green design. Engineers will aim to use more recycled and environmentally friendly materials in the construction of steel box girder bridges. Additionally, energy - efficient construction methods will be developed to reduce the carbon footprint during the construction process. For example, new types of coatings that are more environmentally friendly and have longer service lives may be used to protect the steel from corrosion. Advanced Materials and Construction Technologies The development of advanced materials will continue to drive the evolution of steel box girder bridges. Ultra - high - strength steels with better mechanical properties may be introduced, allowing for even longer - span bridges with reduced material usage. 3D printing technology may also play a role in the future, enabling the production of complex bridge components with high precision and reduced waste.

A multi-span simple steel truss bridge, Vivekananda Setu over the Hooghly River in Kolkata, India   The Vivekananda Setu is a well - known bridge in Kolkata. It is a multi - span simple truss bridge. The truss design provides the necessary strength to support the loads imposed by traffic, including heavy vehicles and pedestrians. The multiple - span configuration distributes the load over a larger area and is more suitable for spanning the Hooghly River. The trusses are typically composed of steel members that are connected in a triangular pattern. This triangular geometry is highly stable and efficient in transmitting loads.   1.Importance for Transportation   Vehicle Traffic: It plays a crucial role in the transportation network of Kolkata. It allows for the smooth movement of a large number of vehicles, including buses, trucks, and private cars, between different parts of the city that are separated by the Hooghly River. This helps in reducing traffic congestion in other areas and enables efficient transportation of goods and people. Pedestrian Movement: There is usually also a provision for pedestrian traffic on the bridge. This allows people to cross the river on foot, facilitating access to workplaces, educational institutions, and recreational areas on both sides of the river.   2.Construction and History   The construction of such a bridge is a complex engineering feat. It requires careful planning and execution. The foundation of the bridge had to be designed to withstand the forces exerted by the river current and the load of the superstructure. The steel trusses were likely fabricated off - site and then assembled on - site using heavy - duty cranes and other construction equipment.   Over the years, the bridge has witnessed significant historical and cultural developments in the city. It has been an integral part of Kolkata's growth and has served as a symbol of connectivity.   3.Maintenance and Challenges   Corrosion: Given its location over the river, the steel components of the truss are prone to corrosion. The humid climate and the presence of water can cause rusting of the steel, which can weaken the structure over time. Regular maintenance activities such as painting, inspection of welds and joints, and application of anti - corrosion coatings are essential to ensure the longevity of the bridge.   Traffic Loads: With the increase in population and traffic in Kolkata, the bridge has to bear heavier traffic loads than it was perhaps originally designed for. This requires continuous monitoring of the structural integrity to detect any signs of over - stressing or fatigue in the truss members.   River - related Challenges: The Hooghly River's flow characteristics can change over time due to factors such as sedimentation and dredging activities. These changes can affect the stability of the bridge's foundations and abutments, requiring periodic re - evaluation and possible modifications.

The Bailey Bridge, a classic modular steel bridge, holds a significant place in the history of bridge engineering due to its exceptional military value and widespread civilian applications. Invented by British engineer Donald Bailey, this bridge perfectly embodies the engineering philosophy of "simplicity is beauty."   I. Core Components of the Bailey Bridge The standardized component system is the most distinctive feature of the Bailey Bridge. The main girders are made of high-strength steel truss units, each measuring 3 meters in length and 1.5 meters in width, connected by pin joints. The transverse beams, made of I-beams, are spaced at fixed intervals to ensure even load distribution. The deck system uses steel grating or wooden planks, balancing traffic capacity and self-weight. Standardized pins and bolts are used for connections, enabling rapid assembly and disassembly. This modular design gives the Bailey Bridge exceptional adaptability and scalability.   II. Technological Evolution of the Bailey Bridge From the initial MkⅠ to the MkⅢ models, the Bailey Bridge has undergone continuous optimization and upgrades. Material-wise, the shift from ordinary steel to high-strength alloy steel has significantly improved load-bearing capacity. Structurally, enhancements in joint connections and truss designs have strengthened overall stability. In terms of construction techniques, specialized bridge erection equipment and methods have been developed, further improving efficiency and safety.   III. Military and Civil Applications During World War II, the Bailey Bridge played a crucial role in military logistics, enabling rapid deployment in diverse terrains. Its versatility allowed it to be used in various configurations, such as floating bridges and multi-span structures. In the post-war era, the Bailey Bridge found extensive civilian use, serving as temporary or permanent structures in disaster relief, rural development, and infrastructure projects. Its cost-effectiveness and ease of installation made it a preferred choice in remote or resource-limited areas.   IV. Engineering Legacy and Future Prospects The Bailey Bridge's design principles have influenced modern modular bridge systems, emphasizing simplicity, efficiency, and adaptability. Today, advanced materials like composites and high-performance steels are being explored to enhance its capabilities further. Innovations in automation and robotics are also being integrated into its construction processes, paving the way for smarter and more resilient modular bridge systems.

On the road of rural revitalization, only by efficiently and orderly promoting rural road safety life protection projects, gradually eliminating road safety hazards, and attaching "safety belts" to the road can we fully ensure the safety of the people's travel. Recently, the happy news came, Chongming District Chenjia Town village road in Shanghai installed waveform guardrail, this initiative won the villagers have praised, it can be said that is expected.   Chongming river system is developed, there are more riverside roads, many roads nearby the river without guardrail, there are certain safety risks for pedestrians and vehicles, this year, Chenjia Town in the process of practical work for the private, will focus on the installation of anti-collision guardrail for the river road, in order to reduce the occurrence of accidents, so that people travel safer. "Before the guardrail was installed, the elderly and children all fell, especially the elderly, who would fall into the ditch next to them accidentally. After the guardrail was installed, everyone was very happy." "Said a villager in Chenjia town.   It can be said that the waveform guardrail has taken the lead and become the "vanguard army" of protecting rural road safety. I believe that under their protection, rural roads will become the villagers' road of happiness and prosperity, leading people to a better tomorrow! Highway anti-collision guardrail factory, Buy good quality Highway anti-collision guardrail products from China

How can the susceptibility to corrosion of steel truss bridges be mitigated? Protective Coatings Paint: Applying high - quality paint is a common and cost - effective method. The paint acts as a barrier between the steel and the external environment, preventing moisture and corrosive agents from reaching the steel surface. Multiple layers of paint can be used, with each layer serving a specific purpose such as adhesion, corrosion inhibition, and weather resistance. For example, epoxy - based paints are often used for their excellent adhesion and resistance to chemicals. Galvanization: This involves coating the steel with a layer of zinc. Zinc is more reactive than steel and acts as a sacrificial anode. In the presence of corrosive substances, the zinc corrodes first, protecting the underlying steel. Hot - dip galvanization is a widely used process where the steel components are immersed in a bath of molten zinc. This provides a thick and durable coating that can offer long - term protection, especially for small - to medium - sized steel members. Cathodic Protection Impressed Current Cathodic Protection: In this system, an external DC power source is used to supply a direct current to the steel structure. The current is adjusted so that the steel surface becomes a cathode, preventing the oxidation (corrosion) process. Anodes, usually made of materials such as titanium or graphite, are placed in the electrolyte (such as water or soil around the bridge foundation) and connected to the power source. This method is effective for large - scale steel truss bridges, especially those in marine or highly corrosive environments. Sacrificial Anode Cathodic Protection: Similar to the principle of galvanization, this method uses a more reactive metal (such as magnesium, zinc, or aluminum) as a sacrificial anode. The anode is electrically connected to the steel structure of the bridge. As the anode corrodes, it provides protection to the steel by supplying electrons and preventing the steel from corroding. This is a passive and relatively maintenance - free method for smaller areas or components of the bridge. Proper Design and Drainage Adequate Ventilation: Designing the bridge to have proper ventilation can help reduce the humidity level around the steel members. For example, in enclosed parts of the truss, such as under the bridge deck or in box - shaped truss members, ventilation holes can be installed to allow air circulation. This helps to dry out any moisture that may accumulate and reduces the chance of corrosion. Drainage Systems: Installing effective drainage systems on the bridge is crucial. Gutters and downspouts can be used to direct rainwater and other fluids away from the steel truss. For example, on the bridge deck, a well - designed drainage system can prevent water from pooling and seeping into the truss structure, minimizing the exposure of steel to moisture. Material Selection and Alloying Weathering Steels: These are a type of steel that forms a protective rust layer on their surface when exposed to the atmosphere. The rust layer is adherent and acts as a barrier against further corrosion. Weathering steels contain alloying elements such as copper, chromium, and nickel. They are a good option for steel truss bridges in certain environments where the corrosive conditions are not too severe. Stainless Steels: Stainless steels have a high chromium content, which forms a passive oxide film on the surface, protecting the steel from corrosion. Although more expensive than traditional carbon steels, they can be used for critical components of the steel truss bridge or in areas with high - corrosive - stress, such as connection points or areas exposed to splash zones in a marine environment.

The construction of the Russky Bridge faced several challenges, including: Harsh Weather Conditions1: Extreme Temperature Variation: The temperature in the construction area ranged from -31°C to 37°C. Such a wide temperature range posed difficulties in the selection and application of construction materials. For example, materials needed to maintain their strength and stability under both extremely cold and hot conditions, which required special material processing and construction techniques to ensure the durability of the bridge. Strong Winds: The area often experienced winds with speeds up to 36 meters per second. High winds not only affected the construction process, such as the installation of bridge components, but also put forward higher requirements for the wind resistance design of the bridge structure to ensure the safety and stability of the bridge under strong wind loads. Storm Surges and High Waves: Storm surges with waves up to 6 meters added to the construction difficulties. These conditions made it challenging to conduct underwater foundation construction and the installation of bridge piers in the marine environment, requiring special construction equipment and technologies to resist the impact of waves and ensure the accuracy and stability of the construction. Thick Ice in Winter: The ice layer in winter could reach 70 centimeters thick. Dealing with thick ice during the construction period required additional measures to ensure the normal progress of the construction, such as the use of special ice-breaking equipment and the adoption of anti-icing technologies for the bridge structure to prevent damage caused by ice. Complex Geographical Conditions: Deep Water: The construction site was located in the East Bosphorus Strait, where the water was deep. Building the bridge foundations in deep water was a complex and challenging task, requiring advanced underwater construction techniques and equipment, such as the use of pile foundations and special underwater concrete pouring techniques to ensure the stability and bearing capacity of the foundations. Unstable Seabed Terrain: The seabed terrain in the construction area was not stable, which increased the difficulty of foundation construction. The construction team needed to conduct detailed geological surveys and adopt appropriate foundation treatment methods to adapt to the complex seabed conditions and ensure the stability of the bridge. Technical Difficulties in Bridge Structure: Long Span: With a central span of 1,104 meters, it was a great challenge to ensure the structural stability and strength of the long-span bridge. The design and construction of the main span required advanced structural analysis and calculation methods, as well as the use of high-strength materials and advanced construction technologies to ensure that the bridge could bear the various loads during its service period. Tall Pylons: The bridge had A-shaped pylons with a height of 320.9 meters, which was extremely high. The construction of such tall pylons required precise control of construction accuracy and stability, as well as the use of special climbing formwork and construction equipment to ensure the quality and safety of the pylon construction. Logistical and Time Constraints: Tight Construction Schedule: The bridge was built to serve the 2012 Asia-Pacific Economic Cooperation summit, so the construction period was very tight. Completing such a large-scale project within a limited time required efficient project management, reasonable construction organization, and the coordination of various construction resources to ensure the progress of the project. Logistics and Material Supply: The construction site was located in a relatively remote area, and the transportation and supply of construction materials and equipment were difficult. Ensuring the timely supply of materials and the normal operation of construction equipment was a major challenge for the construction project.

The world's longest cable-stayed bridge is the Russky Bridge in Vladivostok, Russia1. Here is an introduction to it: Basic information: The Russky Bridge has a total length of 3,100 meters and a central span of 1,104 meters. It connects the Russky Island and the Muravyov-Amursky Peninsula sections of the city across the Eastern Bosphorus Strait. Construction background: It was originally built to serve the 2012 Asia-Pacific Economic Cooperation Conference hosted at the Far Eastern Federal University campus on Russky Island. Design and structure: The bridge has the second-highest pylons in the world after the Millau Viaduct. The design of the bridge was determined by several factors, including minimizing the coast-to-coast distance of 1,460 metres and the navigable channel depth of up to 50 meters. The locality also has severe climate conditions, with temperatures varying from –31 to +37 °C, storms bringing winds of up to 36 m/s, waves up to 6 meters in height, and ice formations in winter up to 70 cm thick. Significance: The completion of the Russky Bridge is a remarkable achievement in bridge construction. It not only provides a crucial transportation link for the city of Vladivostok, ensuring smooth traffic all year round between the mainland and the island, but also showcases Russia's advanced engineering capabilities and infrastructure development level1   The Russky Bridge in Vladivostok, Russia, is not only the world's longest cable-stayed bridge but also features several remarkable architectural characteristics: Towering Pylons: The bridge has two extremely tall A-shaped pylons that rise to a height of 320.9 meters. This height is second only to the Millau Viaduct in France and makes the bridge a dominant feature in the landscape. The A-shape of the pylons is not only an aesthetic choice but also provides excellent structural stability, enabling them to withstand the various forces acting on the bridge, such as the weight of the deck, the tension of the cables, and the strong winds in the area1. Impressive Spans: With a central span of 1,104 meters, it is a true feat of engineering. This long span allows for unobstructed passage of ships below, with a clearance of 70 meters from the water surface. The long span also requires the use of a large number of high-strength cables to support the deck. In total, there are 130 cables, with the longest one reaching 483 meters. These cables are attached to the pylons and the deck at various points, distributing the load evenly and ensuring the stability of the bridge12. Unique Deck Design: The deck of the bridge is designed to be both functional and aesthetically pleasing. It is made of a combination of steel and concrete, with a total weight of 23,000 tons. The deck is 29.5 meters wide, providing four lanes for traffic (two lanes in each direction), allowing for smooth traffic flow. The design of the deck also takes into account the harsh local climate conditions, such as strong winds, storms, and temperature variations. Aerodynamic Shape: The overall structure of the bridge has an aerodynamic cross-section. This design helps the bridge to withstand the strong winds and wind loads in the area, reducing the impact of wind on the stability of the bridge. The aerodynamic shape also enhances the visual appeal of the bridge, making it a beautiful sight from both near and far1. Advanced Construction Techniques: The construction of the Russky Bridge involved the use of advanced techniques and technologies. For example, the self-climbing formwork was used in the construction of the pylons, which allowed for efficient and precise construction. The cables and the main girder were installed simultaneously, ensuring the proper alignment and tension of the cables. Durable Materials: To ensure the durability of the bridge in the harsh marine environment, high-quality materials were used. The cables are coated with high-density polyethylene to protect them from ultraviolet radiation and corrosion. The use of prestressed concrete in the deck and other parts of the bridge also enhances its durability and strength   The Russky Bridge, located in Vladivostok, Russia, is an extraordinary engineering marvel.   Basic Information: It is one of the most impressive cable-stayed bridges in the world. With a total length of 3,100 meters and a central span of 1,104 meters. The bridge connects the Russky Island and the Muravyov-Amursky Peninsula sections of the city across the Eastern Bosphorus Strait.   Design and Structure: The bridge features extremely tall pylons. Standing at a height of 320.9 meters, these A-shaped pylons are among the tallest in the world. The pylons provide excellent structural stability and are designed to withstand the harsh local conditions. The bridge has a total of 130 cables, which are attached to the pylons and the deck. These high-strength cables help distribute the load and support the massive deck. The deck is designed to handle heavy traffic and is made of a combination of steel and concrete. It is 29.5 meters wide and provides four lanes for traffic.   Significance: The Russky Bridge was built to serve important transportation needs. It provides a crucial link between the mainland and Russky Island, facilitating the development of the area. It is also a symbol of Russia's advanced engineering capabilities and infrastructure development. The bridge has become an iconic landmark of Vladivostok, attracting tourists from around the world. The construction of the bridge was a major undertaking that required advanced technologies and expertise. It showcases Russia's ability to undertake large-scale infrastructure projects and overcome complex engineering challenges.  

  As an important form of building structure, steel structure has many advantages and is widely used in many fields.   In the industrial field, steel structure is the first choice for buildings such as factories and warehouses. Its characteristics of high strength and large span can meet the demand for space in industrial production. Large mechanical equipment can be freely arranged in steel structure factories. At the same time, the rapid construction of steel structure can also reduce the construction period of industrial projects and enable enterprises to put into production as soon as possible.   In commercial buildings, steel structures also shine brightly. Office buildings, shopping malls and other places often adopt steel structures to achieve unique architectural designs. Steel structures can create open indoor spaces and provide a comfortable environment for commercial activities. Moreover, its good seismic performance also provides safety guarantees for densely populated commercial places.   In bridge construction, steel structures play an irreplaceable role. Whether it is a cross-river bridge or an urban viaduct, steel structure bridges become an ideal choice with their strong bearing capacity and long service life. Steel structure bridges can adapt to various complex terrains and traffic needs, and have less impact on the surrounding environment during construction.   In addition, large public buildings such as stadiums and convention centers also widely use steel structures. These buildings need large-span spaces to accommodate a large number of audiences and display items, and steel structures just meet this requirement. Its beautiful shape can add a modern atmosphere to the city.   In some special fields, such as petrochemical and marine engineering, steel structures also have an important position. In harsh working environments, steel structures can resist corrosion and various external forces to ensure the safe and stable operation of facilities.   In short, with its excellent performance, steel structures have broad application prospects in many fields such as industry, commerce, transportation, and public buildings. With the continuous progress of technology, steel structures will play a greater role in more fields and create a better living and working environment for mankind.

I. Design and planning stage Accurate design: Ensure that the steel structure design complies with building codes and usage requirements, including load-bearing capacity, seismic performance, fire rating, etc. The design should consider the special uses of industrial buildings, such as the needs for space and structure for equipment installation and goods storage. Reasonable layout: Plan the functional zoning inside the building and the connection with surrounding facilities to ensure the convenience of construction and future use. At the same time, consider the transportation and installation channels of steel structure components. II. Material selection and procurement High-quality steel: Select high-quality steel that meets national standards and project requirements to ensure its strength, toughness and corrosion resistance. Conduct strict inspections on the quality of steel, including chemical composition analysis and mechanical property testing. Connecting materials: Select appropriate connecting parts such as bolts and welding materials to ensure the firmness and reliability of the connection. The quality of connecting materials should match the steel to ensure the stability of the overall structure. III. Construction preparation stage Site preparation: Clean the construction site to ensure that the site is flat, solid and has good drainage conditions. Provide sufficient operating space for large construction equipment and vehicles. Foundation construction: Ensure the firmness and accuracy of the steel structure foundation. The size, strength and burial depth of the foundation should meet the design requirements, and strict quality inspections should be carried out. Component prefabrication: Prefabricate steel structure components in the factory to ensure the dimensional accuracy and quality of the components. During the prefabrication process, strict quality control should be carried out, including welding quality and surface treatment. IV. Construction process stage Installation sequence: Develop a reasonable installation sequence to ensure that the installation process of the steel structure is safe and efficient. Generally speaking, it should start from the foundation and install step by step upwards. At the same time, pay attention to the connection and fixation between each component. Welding quality: Welding is a key link in the construction of steel structures. The welding quality must meet the specification requirements. Welders should have corresponding qualifications and skills, and strict welding process control and quality inspection should be carried out. Bolt connection: Bolt connection is also one of the commonly used connection methods for steel structures. Ensure that the specifications, strength and tightening torque of bolts meet the design requirements. During the installation process, pay attention to the anti-loosening measures of bolts. Safety measures: During the construction process, strictly abide by safety operation regulations and take effective safety measures such as wearing seat belts and setting up safety nets. Ensure the personal safety of construction personnel. V. Quality inspection and acceptance stage Process inspection: During the construction process, regular quality inspections should be carried out, including inspections of component dimensions, welding quality, bolt connections, etc. Correct problems in time to ensure construction quality. Completion acceptance: After the construction is completed, a comprehensive completion acceptance should be carried out. The acceptance content includes the overall stability, load-bearing capacity, fire resistance and other aspects of the structure. Only steel structure industrial buildings that pass the acceptance can be put into use.   Steel Bridge Structure factory, Buy good quality Steel Bridge Structure products from China China EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO.,LTD. Contact Info