Structural structure of the hall; 1 - spread footing, 2 - frame bolt, 3 - purlin, 4 – vertical brace, 5 - roof ridge, 6 - crane beam, 7 - crane beam for suspended transport, 8 - gantry, 9 - wall, 10 - cover.
Types of steel hall structures.
For small hall spans, and sometimes medium, a load-bearing structure is used, consisting of frames made of elements with a full or openwork cross-section. Due to the need to drain water from the roof, the bolts are broken in the ridge. Frames with a lattice beam are usually used to cover halls with medium and large spans, lattice or yucca frames with full or lattice section.
Frame columns can be rigidly or pinned to the foundation. Both full-walled, and the lattice columns of the articulated frames have a constant cross-section along their entire height or a variable one, tapers towards the articulations.
The poles of non-articulated frames in halls without transport and with suspended transport are made with a constant cross-section at their height, and with a supported transport, a larger cross-section below the crane beams is often assumed.
The figure shows the structure of a single-nave hall, which consists of frames with a solid cross-section and a broken transom, perpendicular to the longitudinal axis of the hall. In the longitudinal direction, the rigidity of the hall is ensured by lattice braces - placed in intermediate column fields - crane beams, roof purlins and wall transoms.
Depending on the type of covering - heavy or light - reinforced concrete slabs can be placed directly on the frame transoms (similarly to prefabricated reinforced concrete halls), or sandwich panels. Light roofing, however, is more often placed on purlins based on frame transoms and trusses (Lynx. 7.52).
The spacing of full-walled frames in the longitudinal direction is usually assumed 4,5-9,0 m. Larger spacings, i.e.. 12,0—15.0 is used in lattice systems.