Roof Design Wind

At the same time internal air pressure increases due to air infiltration through openings cracks etc.

Roof design wind.

Wind damage to buildings can range from complete demolition of the structure to total or partial roof displacement blow off to damage to penetrations skylights mechanical equipment vents etc doors and windows. Low wind areas and 110 m p h. As wind flows over the building the pressure directly above the surface of the roof decreases. Refer to local wind speed maps for other wind speed design requirements.

This includes structural components such as roof sheathing or rafters or roof cover components and the connections of these elements. In order to properly design for wind attachment a basic understanding of the effects of winds on buildings is required. Wind design of roof systems is one of the more complicated things that an architect deals with during the design of a building. And with the latest version of asce 7 minimum design loads for buildings and other structures asce 7 it has become that much more challenging for roof system designers and roofing contractors.

Roof damage caused by wind occurs when the air pressure below the roofing assembly is greater than the air pressure above the building s roof. Please note that a 1 90 or a 1a 90 rating does not provide the necessary wind speed requirements. Roof wind designer initially was developed in cooperation with the midwest roofing contractors association and north east roofing contractors association. Roof design wind loads are the wind pressures and resulting uplift forces for which the roof structure is designed.

A dfcm roof history record is required on all roofing systems contractors responsibility.