Steel Buildings in Europe

Title A.1 Simply supported, laterally unrestrained beam 2 of 7 4 – 58 1.4. Basic data Span length: 5,70 m Bay width: 2,50 m Slab depth: 120 mm Partitions: 0,75 kN/m 2 Imposed load: 2,50 kN/m 2 Concrete density: 24 kN/m 3 Steel grade: S235 Weight of the slab: 0,12  24 kN/m 3 = 2,88 kN/m 2 1.5. Choose a section Try IPE 330 – Steel grade S235 1.5.1. Geometric properties Depth h = 330 mm Width b = 160 mm Web thickness t w = 7,5 mm Flange thickness t f = 11,5 mm Root radius r = 18 mm Mass 49,1 kg/m Section area A = 62,6 cm 2 z z y y t f t w b h Second moment of area about mayor axis: I y = 11770 cm 4 Second moment of area about minor axis: I z = 788,1 cm 4 Torsional constant I t = 28,15 cm 4 Warping constant I w = 199100 cm 6 Elastic modulus about major axis: W el,y = 713,1 cm 3 Plastic modulus about major axis: W pl,y = 804,3 cm 3 Yield strength Steel grade: S235 The maximum thickness is 11,5 mm < 40 mm, so: f y = 235 N/mm 2 Note: The National Annex may impose either the values of f y from Table 3.1 or the values from the product standard. EN 1993-1-1 Table 3.1 1.5.2. Actions on the beam Self weight of the beam : (49,1 × 9,81) × 10 -3 = 0,482 kN/m