Bridge transport semi-trailers are specialized heavy-duty transport equipment developed specifically for highway bridge construction. Featuring a multi-axle, low-load-bearing surface design, they boast high load-bearing capacity and low ground pressure. Primarily used for the on-site transfer and erection of ultra-large and ultra-heavy concrete components such as precast bridge box girders, T-beams, and cap beams. The entire vehicle utilizes a high-strength welded frame and a multi-axle balanced suspension system, allowing it to adapt to unpaved construction sites. Working in conjunction with beam-carrying artillery vehicles, it is a core transport equipment for infrastructure projects such as highways, viaducts, and intercity railways.