Trial Assembly-The Manufacturing of Steel lattice tower

In accordance with GB/T 2694 and project contract requirements, we select representative tower sections or complete tower heads and body nodes from each production batch for factory pre-assembly. Trial assembly is usually conducted on a dedicated assembly platform, which is precisely leveled to simulate the actual installation reference plane. Workers follow the erection drawings and bolt lists strictly, using bolts and washers identical to those used on site, to assemble main members, diagonals, horizontals, and secondary members piece by piece.

During trial assembly, our quality engineers focus on the following inspection items: overall geometric deviations, such as tower body width, diagonal differences, and cross-arm level differences; the fit-up degree of all connection joints to verify that root cleaning, back shaving, and hot bending results meet standards; and a 100% bolt pass-through rate, with reaming or forced driving strictly prohibited. Accessory components such as ladders, platforms, and cable supports are also verified for connection compatibility.

After assembly, we use laser rangefinders, theodolites, and specialized measuring tools to conduct comprehensive measurements, recording every data point and taking photographic records. If any deviation is found, we immediately trace back to the responsible process and implement corrective actions until all design tolerance requirements are fully met. Once trial assembly is passed, components are numbered according to erection sequence, disassembled, and packed for delivery. This step fundamentally eliminates on-site erection uncertainties. Especially for export projects, we can identify and solve problems domestically, ensuring that towers arrive on site ready for smooth and efficient erection.