The peak velocity pressure qp(z) at height z is calculated automatically.
Air density ρ is defined by user.
ce(z) = Exposure factor
Iv(z) = Turbulence intensity
vb = Basic wind velocity
vm(z) = The mean wind velocity
qb = Basic velocity pressure
qp(z) = Peak velocity pressure
ρ = Air density
The peak velocity pressure qp(z) at height z, is calculated using equation below.
The National Annex may give rules for the determination of qp(z).
Air density, ρ may be given in the National Annex. The recommended value is 1,25 kg/m3.
Exposure factor ce(z) is defined equation given below.
Basic velocity pressure qb is defined equation below.
For co =1,0 and kI =1.0 illustrations of exposure factor ce(z) is defined in EN 1991-1-4 Figure 4.2.