Part 1: Architect’s Guide 1 - 18 There are several types of composite beams, as shown in Figure 4.7. In these examples, the steel profile can be a rolled profile, a welded profile or a cellular beam. In example (c), the steel profile is a rolled profile. (a) (b) (c) Plain slab: this solution requires temporary formwork. A pre-slab or a steel decking is used as permanent formwork and contributes to the bending resistance of the slab. The beam is partially concrete encased to improve fire resistance. Figure 4.7 Composite beams In multi-storey buildings, the total depth of the floors often needs to be reduced to a minimum. The design of slim floors consists of integrating the steel beam to the concrete slab. Figure 4.8 shows two types of integrated steel beams. Figure 4.8 Integrated beams (slim floors) Figure 4.9 shows three examples of steel beams used as integrated steel beams. The lower flange is a plate welded to the web of a half rolled profile The upper flange is a plate welded to the web of a half rolled profile A plate is directly welded under the lower flange of a rolled profile Figure 4.9 Different types of profiles used as integrated beams
RkJQdWJsaXNoZXIy MzE2MDY=