Steel Buildings in Europe

Title Appendix A Worked Example: Wind action on a multi-storey building 13 of 18 3 - 34  Windows accidentally open upwind, wind on the gable: c pi = 0,9 c pe = 0,9 × (+0,7) = 0,6  Windows accidentally open downwind, wind on the gable: c pi = 0,9 c pe = 0,9 × (-1,2) = -1,1 3.4. Resulting pressure coefficients on parapets The peak velocity pressure at the top of the building ( z e = 35 m) is: q p ( z e ) = 1,09 kN/m 2 The solidity ratio is:  = 1 3.4.1. Parapets on the long side – Wind on the long side The parameters are: ℓ = 120 m Length of the parapet h p = 1,50 m Height of the parapet ℓ > 4 h p The different zones are in Figure A.4 with the pressure coefficients c p,net . EN 1991-1-4 Table 7.9 Figure 7.19 0,45 m 1,50 m 3,00 m 120 m 6,00 m A B C D Zone A: c p,net = 2,1 Zone B: c p,net = 1,8 Zone C: c p,net = 1,4 Zone D: c p,net = 1,2 Figure A.4 Pressure coefficients c p,net on the parapet – Long side 3.4.2. Parapets on gable – Wind on gable The parameters are: ℓ = 10 m Length of the parapet h p = 1,50 m Height of the parapet ℓ > 4 h p The different zones are in Figure A.5 with the pressure coefficients c p,net . EN 1991-1-4 Table 7.9 Figure 7.19