Steel Buildings in Europe

Title APPENDIX B. Worked Example: Wind action on a single-storey building 3 of 11 3 - 48 8. Peak velocity pressure (alternative for a single-storey building) q p ( z ) = c e ( z ) q b where: ( ) ( ) ( ) ( ) ( ) 1 7 2 r 2 o r o l r e c z c z c z c z k k c z         EN 1991-1-4 § 4.5(1) 1,0 0,706 1,56 1,0 0,706 ( ) 1 7 1,0 0,215 2 2 e               c z Then: q p ( z ) = 1,56  423 = 659 N/m 2 q p ( z ) = 0,659 kN/m 2 for z = 8 m 3. Wind pressure on surfaces 3.1. External pressure coefficients c pe,10 3.1.1. Vertical walls 1. Wind on gable h = 8 m b = 32 m (crosswind dimension) h < b , so z e = reference height = h = 8 m EN 1991-1-4 7.2.2 (1) Figure 7.4 d = 60 m h / d = 8/60 = 0,13 ( h/d < 0,25) EN 1991-1-4 7.2.2 (2) Table 7.1 2 h = 16 m e = 16 m ( b or 2 h , whichever is smaller) EN 1991-1-4 § 7.2.2 (1) Figure 7.5 e < d e /5 = 3,2 m 4/5 e = 12,8 m d – e = 44 m Figure B.2 defines the external pressure coefficients c pe,10 on vertical walls for zones A, B, C, D and E with wind on the gable. EN 1991-1-4 § 7.2.2(2) Table 7.1