Eurocode 1 Wind load on prism elements with rectangular cross-section (force coefficient)

Calculation of wind load action effects on prism elements with rectangular cross-section. The total horizontal wind force is calculated from the force coefficient corresponding to the overall effect of the wind action on the structure
According to:
EN 1991-1-4:2005+A1:2010 Section 7.6
Applicable for:
Structures with rectangular plan, isolated elements with rectangular cross-section
Supported National Annexes:
Only countries that adopt CEN recommended values for sections 7.6 and 7.13 of EN1991-1-4 are supported. The value of the peak velocity pressure can be specified manually. Otherwise automatic calculation of peak velocity pressure is supported, in addition to countries that adopt the CEN recommended values for NDPs, also for the following National Annexes: Finland, Portugal. The National Annexes of Germamy, Norway, Spain, Sweden, Switzerland are NOT supported (enter peak velocity pressure manually).
All Calculations

Hint: Select 'Custom peak velocity pressure' in the terrain category dropdown in order to manually specify the peak velocity pressure.

The terrain categories are illustrated in EN1991-1-4 Annex A. The transition zones between terrain categories are specified in EN1991-1-4 §A.2.
The basic wind velocity is given as vb = vb,0cdircseason where the fundamental value of basic wind velocity vb,0 is defined in EN1991-1-4 §4.2(1)P and its value is provided in the National Annex. Altitude correction may also be specified in the National Annex for EN1991-1-4 §4.2(2)P. The directional and season factors are generally cdir = 1.0 and cseason = 1.0. For particular cases values smaller than 1.0 may be specified in the National Annex for EN1991-1-4 §4.2(2)P.
For cross-sections with sharp corners r=0

Orography factor larger than 1.0 may be applicable over isolated hills and escarpments. See EN1991-1-4 §4.3.3 and §A.3 for more details.
Structural factor cscd in accordance with EN1991-1-4 Section 6. A value of cscd = 1.0 is generally conservative for small structures not-susceptible to wind turbulence effects such as buildings with height less than 15 m.
Nationally Defined Parameters
According to EN1991-1-4 §4.5(1) and the National Annex.
Note: Always verify the validity of the Nationally Defined Parameters. Please inform us of any discrepancy using our Contact Form