Roof Wind Load Formula

G gust effect factor.

Roof wind load formula.

Q h velocity pressure at mean roof height h using the exposure defined in section 26 7 3. The design wind load shall be calculated as. This formula takes a few more parameters into account for wind load. Q velocity pressure in psf given by the formula.

In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant. P q h g cn 30 8 1 where. 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 c p i internal 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. G 0 85 as gust effect factor. 2 4 wind load on open building and other structures. 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.

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. It provides the wind load calculations on uplift leeward windward and roof forces of a building.