Wind Lbs On Roof

Let s assume that the calculations for our building require a roof that can withstand 23 pounds per square foot of uplift force in the field of the roof.

Wind lbs on roof.

The upward movement of the wind exerts an uplift load on the roof and the roof must be able to resist this uplift. Wind pressure is given by the equation p 0 00256 x v2 where v is the speed of the wind in miles per hour mph. Wind exerts three types of forces on a structure. Depending on the location a typical wind load is 80 mph or 16 lb ft2.

Wind flow under a roof pushes upward. If your roof is located in windswept areas or even north of the treeline the wind will cause snow drifting making less of it accumulate on your roof. 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. Slipperiness of the roof.

Wind flow over a roof pulls upward. In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant. Less snow will accumulate on a slippery roof it will slide off instead. For example if the wind speed is 70 mph the wind pressure is 0 00256 x 70 2 12 5 psf.

A typical uplift load limit assumes a maximum wind speed of about 90 miles per. As you might expect buildings of high importance such.