Sub-truss frames flooring of an industrial building

The floorings of single-storey industrial buildings of frame type are considered. It is noted that ribbed plates, rafter and footing structures in their standard design solution are rather bulky prestress structures and require high manufacture and transportation inputs; large construction depth of flooring increases the bulk of a building and operating costs; the distance between the transverse axes of 6 m or 12 m is not always sufficient for the shop equipment layout. The sub-truss frames flooring from the top and bottom flanges and the vertical racks supporting the fencing part in the form of a solid monolithic slab on closely placed low-height roof beams is suggested. Structural calculations are performed taking into the account the nonelastic deformations according to the recommended Construction Rules deformation diagrams: trilinear for concrete, and bilinear for reinforcement. The results for buildings with the spans of 30 m and 24 m with the spacing between the transverse axes being 18 m are given.