Main points of processing technology of truss steel structure

First, large truss steel structure processing as far as possible in the ground tire frame for single truss welding, and then hoisted to the top of the column in place, and then welding the transverse rod between the trusses.

2. If the span and dead weight of the truss exceed the hoisting mechanical capacity, the assembly welding is generally carried out in sections according to the lifting weight on the ground. Temporary bolts are used to fix the joint between the equipment of each section. After the welding of the section is completed, the temporary bolts at the section are disassembled and hoisted to the platform of the installation position section by section for closing weld welding.

3. No matter whether the tire frame is installed on the ground or in the air, the welding sequence should be based on welding the middle node first and then extending to the two ends of the truss node, so as to avoid the size error between the two ends of the truss node, and do not weld the two ends of the same straight pipe at the same time.

Four, the weld size should meet the design requirements of thickness or foot size, but to avoid too much surfacing. Truss structure processing Truss structure processing

Five. When the root gap of the weld groove is greater than the standard value (1.5 mm), the size of the solder foot can be increased according to the excess gap value. When the gap is greater than 5 mm, the surfacing and grinding method should be used to trim the main end or surfacing the welding path on the main surface of the interface to reduce the weld gap.