Every bridge involves a process from engineer design drawings to worker fabrication, and includes load test data. Related information such as bridge type, bridge length, bridge width, load, clear deck width, service life, etc.

The "Prefabricated Highway Steel Bridge User Manual" (compiled by Yu Zhongquan, reviewed by Su Shangen and Zhu Yongzhuo - Ministry of Communications, Transportation Combat Readiness Office), published in June 1998, targets the Ministry of Communications standard "General Specifications for Highway Bridge and Culvert Design" (JTJ021-89). In it, the traffic load was defined in classes such as Qi-10, Qi-15, Qi-20, and Super Qi-20. It has been 25 years since then, and traffic loads have also increased significantly. According to current load standards, the span limit for a Bailey Bridge is 60 meters, and the traffic loads it carries are also extremely light. Its applicability is not broad; therefore, large spans and heavy load capacity for Bailey steel bridges have always been relatively contradictory.

Our company, through joint efforts with 4 doctoral supervisors and a group of students from the Road and Bridge Engineering specialty of Nanjing University of Science and Technology, has successfully developed and trialed a large-span Bailey Bridge tension-jacking system. The experimental bridge model is 51m, with a load capacity of 60 tons. The Bailey Bridge structure is a Type 321 Triple-Row, Single-Story, Reinforced, single-lane structure. Originally, this structure at 51m reached its limit carrying only a few tons. However, through the counter-tension-jacking system jointly developed by our company and NJUST professors, this Bailey Bridge structure is enabled to satisfy the smooth passage of a 60-ton load. This has opened up entirely new prospective opportunities for the application scenarios of large-span, heavy-load Bailey Bridges. The aforementioned pictures show the process of our company's experiment, demonstration, processing, trial production, erection, and final acceptance.