Steel Buildings in Europe

Part 10: Technical Software Specification for Composite Beams 10 - 25 For the classification, the flange slenderness is:  f = 0,5 ( b – t w – 2 r )/ t f If  f  10  The flange is class 2 (or 1) (EN 1993-1-1 Table 5.2). When  f > 10  , the following requirements shall be fulfilled to conclude that the flange is class 2 (EN 1994-1-1 § 5.5.2(1) and § 6.6.5.5):  For plain slabs or slabs with profiled steel sheeting parallel to the beam axis, the longitudinal spacing between the connectors is lower than 22  t f .  For slabs with profiled steel sheeting perpendicular to the beam axis, the longitudinal spacing between the connectors is lower than 15  t f .  The longitudinal spacing between the connectors is lower than 6 times the slab depth (6 h f ).  The longitudinal spacing between the connectors is lower than 800 mm.  The clear distance from the edge of the flange to the nearest line of connectors is not greater than 9  t f . Class of the web If y pl,a > h – t f – r The web is fully in tension. So the web has not to classified. For the classification, the flange slenderness is:  w = ( h – 2 t f – 2 r )/ t w The compression part of the web is estimated by the  ratio: t r h h t r y 2 2 f pl,a f        Here the  ratio is supposed to be lower than 0,5. If  w  13 1 456    The web is class 2 (or 1). 6.3.3 Vertical shear resistance The vertical shear resistance of a cross-section is calculated according to EN 1993-1-1 § 6.2.6. The contribution of the concrete slab is neglected. M0 v,z y pl,Rd 3  A f V  The criterion is calculated by: pl,Rd Ed V V V  