Roof Wind Load Formula

G c p i internal pressure coefficient.

Roof wind load formula.

In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant. 2 4 wind load on open building and other structures. Q h velocity pressure at mean roof height h using the exposure defined in section 26 7 3. C p external pressure coefficient.

When building a structure it is important to calculate wind load to ensure that the structure can withstand high winds especially if the building is located in an area known for inclement weather. C n is net pressure coefficients include from top and bottom surfaces given in. The design wind load shall be calculated as. It provides the wind load calculations on uplift leeward windward and roof forces of a building.

Q 0 00256 k z k z t k d v 2 3 q q h for leeward walls side walls and roofs evaluated at roof mean height h. Q velocity pressure in psf given by the formula. P q h g cn 30 8 1 where. Once the wind speed has been calculated the user can provide additional information regarding the building such as building height type and cladding to get the wind pressure wind load based on asce 7 10 as 1170 and en 1991 provisions.

The formula for wind load is f a x p x cd x kz x gh where a is the projected area p is wind pressure cd is the drag coefficient kz is the exposure coefficient and gh is the gust response factor. G gust effect factor.