Width - B = m
Length - L = m
Height at roof ridge - h1 = m
Height at roof eaves - h2 = m
α = atan((h1 − h2)·2B) °
- frames - a = m
- wind columns - b = m
- side beams - cs = m
- purlins - cp = m
Fundamental value of the basic wind velocity - vb_0 = kN/m²
[EN 1991-1-4, Table 4.1]
0. Sea or coastal area...
I. Lakes or flat and horizontal area...
II. Area with low vegetation...
III. Area with regular cover of vegetation or buildings...
IV. Area in which at least 15 % of the surface is covered with buildings with h > 15 m
Internal pressure coefficient - Cpi =
[EN 1991-1-4 Fig.7.13, Note 2]
(should be taken the relevant value of -0.3 and +0.2)