Minimum Roof Parapet Height

In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in height.

Minimum roof parapet height.

Equal to or less than. United kingdom the rules within the uk are similar to the usa parapets must be 1 1 meters high otherwise other fall protection measures must be taken. Flashing height limitations for bitumi nous roof systems have remained at about 24 inches 610 mm without special precautions but the popularity compati bility and lighter installed weight of ther moset single ply sheets made single ply manufacturers rethink this restraint. However when a roof slopes down toward an exterior wall and parapet with a slope greater than 2 12 further analysis is required to determine if a taller parapet is necessary.

The parapet must have a height of 42 inches 1 1 meters plus or minus 3 inches 8 cm above the roof surface to serve as fall protection measure. Height of roofing at wall. T 1 t 2. Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection.

However when a roof slopes down toward an exterior wall and parapet with a slope greater than 2 12 further analysis is required to determine if a taller parapet is necessary. The minimum height of a parapet wall above the roof surface is 30 inches. If a parapet wall is a minimum of 30 high and the height plus the width of the wall is a least 48 then it was determined that the fall hazard was removed and this was a compliant method to protect construction employees. T 1 t 2.

Insulate within parapet wall cavity to depth of roof insulation if present. The minimum height of a parapet wall above the roof surface is 30 inches. Keep in mind that these are minimum requirements and most wall heights should be increased based on the situation. Equal or less than 200.

Measured in feet this is about a 2 feet. Minimum of 12 to top of parapet. Parapet height h to be not more than. Roof membrane must lap up wall to minimum of 12 above roof plane or per specifications.

Cavity wall thickness and parapet heights.