EN 1991-1-4 · SP RK EN

Wind on free-standing walls and parapets

Net pressure coefficients c_p,net in zones A–D accounting for solidity and return corners.

Results

Detailed report

Project Subject Designer Date

About this calculation

Net pressure coefficients c_p,net in zones A–D accounting for solidity and return corners.

Design basis

EN 1991-1-4, 7.4.1, Table 7.9

Input data

Wind at the site: Site; Kazakhstan wind zone; Fundamental basic wind velocity vb,0; Directional factor cdir; Season factor cseason; Terrain category (Table 4.1); Orography factor c0; Air density ρ
Wall: Element; Wall (parapet) height h; Top of parapet above ground; Wall length l; Solidity ratio φ; Return corners of length ≥ h; Shelter factor ψs

Output

External pressure coefficients c_pe and pressures by zone
Peak velocity pressure q_p(z) with intermediate values
Zone layout and a detailed PDF, Word, Excel report

FAQ

Where do I get the basic wind velocity for Kazakhstan?

Start typing a settlement name — the wind zone and v_b,0 are filled from the SP RK EN 1991-1-4 map. The zone map is also available as a separate page.

Is internal pressure included?

Yes, c_pi per 7.2.9; internal pressure is given as a separate load and is not added to the external pressure.

Can the report be used in a design?

The report shows formulas, substitutions and clause references. Check national parameters against the current National Annex; the designer is responsible for the result.