Steel Buildings in Europe

Title APPENDIX A. Worked Example: Snow load applied on a single-storey building 6 of 8 3 - 41 where:  1 = 0,8 and s 2 = 5,20 kN/m 2 where  w = 4 3.4. Lower roof: drifting at obstructions (parapets) Only persistent/transient design situations are to be considered. Angle of the roof (10%):  = 5,7°  1 (5,7°) = 0,8 s = 0,8  0,65 = 0,52 kN/m 2 EN 1991-1-3 § 6.2(2)  2 =  h / s k  where: h is the height of parapet. It varies between 0 m at ridge and 1,25 m at low eaves.  = 2 kN/m 3 At ridge :  2 = 0  At low eaves:  2 = 2  1,25/0,65 = 3,8 With the restriction: 0,8 ≤  2 ≤ 2   2 varies between 0,8 at ridge, and 2 at eave. s varies between 0,52 kN/m 2 at ridge, and 2  0,65 = 1,30 kN/m 2 at low eaves. The drift length l s is determined by: l s = 2 h This drift length varies between 0 m at ridge and 2,50 m at low eaves. The recommended restriction is: 5 m ≤ l s ≤ 15 m. Therefore: l s = 5 m at low eaves. 5,00 m 5,00 m 0,52 kN/m 2 5,00 m 1,30 kN/m 2 0,52 kN/m 2 0,52 kN/m 2 1,30 kN/m 2 1,30 kN/m 2 5,00 m 5,00 m Figure A.6 Drifted snow load arrangement on the lower roof in the case of obstruction in persistent design situation