Steel Buildings in Europe

Part 2: Concept Design 2 - 61 The use of full depth end plates m ay mean that the connections can no longer be assumed to be pinned. In m any instances, it is assum ed that the connection may still b e regarded as pinned, as long as the end plate thickness is no more than half th e bolt d iameter, in S27 5 stee l. Som e regulatory autho rities m ay wish to see a calculation to demonstrate the connection classification. 5.9.1 Beam to column connections When connections are not subject to to rsion, sim ple (vertical shear only) connections are usually detailed. Sta ndard connections are used, with the choice of detail left to the steelwork contractor. The standard connections are the flexible end plate, a fin plate or double angle cleats, shown in Figure 5.21. It is commonly assumed that the types of connections shown in Figure 5.21 are pinned, as long as the plates and angles are relatively thin (10 mm in S275 steel). Multi-storey steel buildings Part 5: Joint design [8] cover the design of pinned connections. (a) (b) (c) Figure 5.21 Standard beam connections. (a) Flexible end plate (b) Fin plate (c) Double angle cleat In general, flexible end plates ar e generally used for beam -to-column connections. Fin plates are often used for beam-to-beam connections. 5.9.2 Beam to beam connections Beam-to-beam connections also utilis e the standard details, although the secondary beam will need to be notched, as shown in Figure 5.22. Figure 5.22 Beam to beam connection