Wind Uplift At Parapet Walls On Roofs

This zone accounts for about 5 of the roof surface represented the corners of the roof.

Wind uplift at parapet walls on roofs.

The parapet walls helps keep the wind resistance from compromising the roof s edge. Parapets are a combination of wall and roof pressures. Any areas between the wall corners that are not included within zone 5. The exact height of the parapet is not factored into the roof wind uplift calculations but if the parapet is 3 feet or higher the perimeter values can be used at the corners lowering the uplift requirements for that portion of the roof area.

Separation of air flow over the leading edge of building roofs causes the pressure. Used for roof overhang area along the perimeter of zone 3. Before we can answer the question however we must first define wind uplift. Historically so many problems have occurred with parapets that we have a name for it.

Improves wind uplift resistance wind is a major culprit for roof damages. Wind damage to buildings is primarily caused by roofing damage under high uplift forces caused by wind action. Parapet walls can serve several purposes. Used for roof overhang area along the perimeter of zone 2.

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. Has the highest load. Parapetitus they have a long history which of course is not always clear that allows me to embellish without threat of peer review reversal.