Steel Buildings in Europe

Part 5: Detailed Design of Trusses 5 - 31 2,86 kNm -1,05 kNm 2,151 Bending moment M Ed -1,82 kN Shear force V Ed Figure 4.2 Bending moment and shear force in the upper chord Cross-section properties For an IPE 330 with horizontal web (steel grade S355) A = 62,6 cm 2 I y = 11770 cm 4 I z = 788 cm 4 W el,z = 98,5 cm 3 Class of the cross-section The material parameter is:  = 0,81 As simplification, the cross-section can be classified in uniform compression, even if it is subjected to combined axial force and bending moment. The compressed flanges are classified as outstand flanges (EN 1993-1-1 Table 5.2, Sheet 2): 5,1 9 7,29 11,5 58,25      t c The flange is Class 1. The web is classified as an internal compressed part (EN 1993-1-1 Table 5.2, Sheet 1): 34,02 36,1 42 7,5 271      t c The web is Class 4. Effective properties of the cross-section The effective area A eff is calculated for pure compression. The flanges are Class 1, so fully effective.