METHOD TO MANUFACTURE LONG SPAN TRUSS FROM BOX SECTION Russian patent published in 2012 - IPC E04C3/11 

FIELD: construction.

SUBSTANCE: method of manufacturing includes assembly of belts and welding of a grid to belts with subsequent disassembly of a truss along mounting joints into deliverable assemblies. Belts assembly is carried out for the whole span with belts bending. At first both belts with breakdown into deliverable assemblies are assembled as straight on bolt flange joints. Then box belts are cut in units of belts fracture along the outer shelf and two walls of the section, and belts are bent along non-cut shelves along with the truss contour. Plates with thickness equal to an open gap in the section shelf are installed into open cuts of belts. The plate is welded to cut shelf and walls of the section. Afterwards the truss grid is installed and welded to the belts. After welding of assembly joint plates, the truss is disassembled into deliverable assemblies, and inaccessible welded seams are welded additionally in deliverable assemblies.

EFFECT: simplified manufacturing and higher accuracy of deliverable assemblies jointing to each other.

6 dwg