Steel Buildings in Europe

Part 5: Joint Design 5 - 89 b f,uc is the flange width of the upper column 5.2.1.3 Bolt group resistance Ed F 2 p 2 Ed F e p p 1 1 1 e 1 2 1 Column flange 2 Flange cover plate Basic requirement: F Ed ≤ F Rd F Rd,fp is the design resistance of bolt group [EN 1993-1-8, §3.7(1)] F Rd = Σ F b,Rd if ( F b,Rd ) max ≤ F v,Rd F Rd = n fp ( F b,Rd ) min if ( F b.Rd ) min ≤ F v,Rd ≤ ( F b,Rd ) max F Rd = n fp F v,Rd if F v,Rd ≤ ( F b,Rd ) min n fp is the number of bolts between one flange cover plate and upper column Shear resistance of bolts F v,Rd is the shear resistance of a single bolt F v,Rd = M2 v ub p    f A [EN 1993-1-8, Table 3.4] where:  v = 0,6 for 4.6 and 8.8 bolts = 0,5 for 10.9 bolts A is the tensile stress area of the bolt, A s β p = 1,0 if t pa ≤ d /3 [EN 1993-1-8 §3.6.1(12)] = pa 8 3 9 t d d  if t pa > d /3 t pa is the total thickness of the packing  M2 is the partial factor for resistance of bolts