Roof Wind Load Formula

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.

Roof wind load formula.

C p external pressure coefficient. 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. C n is net pressure coefficients include from top and bottom surfaces given in. It provides the wind load calculations on uplift leeward windward and roof forces of a building.

G gust effect factor. Q velocity pressure in psf given by the formula. P q h g cn 30 8 1 where. This formula takes a few more parameters into account for wind load.

G c p i internal pressure coefficient. G 0 85 as gust effect factor. 2 4 wind load on open building and other structures. In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant.

The design wind load shall be calculated as. 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.