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  10. Section 6: Wind velocity ...

Section 6: Wind velocity and velocity pressure

6.1 Basis for calculation

6.2 Basic values

6.3 Mean wind velocity and pressure

6.3.1 Variation with height

6.3.2 Terrain roughness

Terrain categoryz0[m]zmin[m]kr
0   Sea or coastal area 0,00310,16
I   Lakes or flat and horizontal area 0,0110,17
II  Area with low vegetation 0,0520,19
III Area with regular cover of vegetation or buildings or with isolated obstacles 0,350,22
IV Area in which at least 15 % of the surface is covered with buildings and civil engineering works or forest1,0100,23
Table 6.1

6.3.3 Terrain orography

(6.13)   \[c_e(z) = \frac{q_p(z)}{q_b} = c_r^2(z) \cdot c_o^2(z) \cdot \left[1 + g_u \cdot I_u(z)\right]^2 \]

6.3.4 Large and considerably higher neighbouring structures

Not implemented in Diamonds.

6.3.5 Closely spaced buildings or civil engineering works and obstacles

Not implemented in Diamonds.

6.4 Wind turbulence

6.5 Peak wind velocity and peak velocity pressure

On this page

  • 6.1 Basis for calculation
  • 6.2 Basic values
  • 6.3 Mean wind velocity and pressure
  • 6.3.1 Variation with height
  • 6.3.2 Terrain roughness
  • 6.3.3 Terrain orography
  • 6.3.4 Large and considerably higher neighbouring structures
  • 6.3.5 Closely spaced buildings or civil engineering works and obstacles
  • 6.4 Wind turbulence
  • 6.5 Peak wind velocity and peak velocity pressure