| 摘要 |
FIELD: construction.SUBSTANCE: truss is made of straight box-shaped belts with a triangular or a diagonal web. Single-shear ends of diagonals are connected by welding with belts. First half-trusses are manufactured in accordance with the project. The upper belt is laid, which comprises a flanged mounting joint of the belt and a support unit of the half-truss. The support unit comprises two gusset plates welded to the belt to continue the plane of walls of the upper belt. A support plate of the half-truss is welded perpendicularly to the gusset plates. Then the lower belt of the truss is laid with width equal to the upper belt, which comprises a flanged mounting joint of the lower belt of the half-truss. Afterwards rods in the web of the rising direction of the half-truss are butt-welded to the belts, making them box-shaped and equal in width to belts of half-trusses. Then rods of the web of lowering direction are laid as overlapping over the units of the half-truss, making them from two parallel unequal-sided angles or strips. Strips are pre-stressed, being tightened in the middle with a bolt.EFFECT: reduced labour intensiveness of manufacturing.4 dwg |
