About this calculation
Force coefficient cf = cf,0·ψr·ψλ and total force on prismatic elements.
Design basis
EN 1991-1-4, 7.6, 7.13
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
- Element: b — crosswind width; d — in-wind depth; l — element length; ze — reference height; r — corner radius; Apply end-effect factor ψλ (7.13); cf,0 override (0 — per Fig. 7.23); Structural factor cscd
Output
- External pressure coefficients cpe and pressures by zone
- Peak velocity pressure qp(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 vb,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, cpi 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.