Steel Buildings in Europe

Part 2: Concept Design 2 - 57 Composite edge beam s require careful detailin g of U-bars around th e shear connectors and into the precast units or structural topping – therefore non-composite edge beams are preferred. Critical checks are usu ally the torsi onal res istance, com bined to rsion an d lateral torsional buckling resistance in the construction condition (when loaded on one side only), or lateral torsiona l buckling in the construction condition (with loads on both sides). Deflection may be critical for all types of integrated beams. Typical beam sizes of s lim floor beams and integrated beams for spans of 5 m to 8 m are presented in Table 5.6 and Table 5.7 respectively. 6.0m 3.0m 3.0m 6.0m 6.0m 7.5m HEA 220 S355 HEA 220 S355 HEA 240 S355 HEA 220 S355 HEA 240 S355 HEA 220 S355 HEB 220 S355 HEA 240 S355 HEA 240 S355 HEA 220 S355 HEB 220 S355 HEA 240 S355 HEA 240 S355 HEA 220 S355 HEA 220 S355 HEA 220 S355 HEA 240 S355 HEA 220 S355 IPE 400 S235 IPE A 450 S235 IPE 400 S235 IPE 400 S235 IPE 240 S235 IPE 240 S235 IPE 240 S235 IPE O 300 S235 IPE 400 S235 IPE A 400 S235 6 HEB 260/460 x 15 IPE A 400 S235 6 HEB 260/460 x 15 IPE 220 S235 IPE 220 S235 1 2 1 3 4 5 1. Side bracing 2. Precast concrete units + 60 mm NWC topping 3. Wall bracing 4. Stairs 5. Lifts and toilets 6. Slimflor beam Figure 5.17 Slim floor steelwork arrangement for a four-storey rectangular building (central spine slim floor beam and downstand edge beams)