Roof Parapet Wall Height

Cavity wall thickness and parapet heights thickness parapet height h to be not more than.

Roof parapet wall height.

Height of roofing at wall. With it parapet walls are indicated automatically on the roof sketch as flattened panels similar to an unfolded pizza box. 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. Minimum of 12 to top of parapet.

Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection. Top of parapet below cap to be sealed with fluid applied flashing. If you didn t get it right you concentrated the stresses at roof edges and you could suck in a parapet or tear or rip a membrane at the parapet photographs 3 and 4. Do not lap tpo over top of parapet unless required by unique construction conditions.

The height of the parapet shall be not less than 30 inches 762 mm above the point where the roof surface and the wall intersect. Roof membrane temperatures ottawa canada summer day. T 1 t 2 equal or less than 200. Courtesy of max baker and the national research council of canada.

Accounting for roof penetrations when dealing with parapet walls the extra material needed to cover the vertical surface of the inside face of the parapet isn t the only added factor to take into consideration. Where building parapet heights exceed 42 inches special provisions shall be employed to provide a safe means of access to the top of the parapet for rigging purposes if such access is necessary to the safe performance of the work. Where the roof slopes toward a parapet at a slope greater than two units vertical in 12 units horizontal 16 7 percent slope the parapet shall extend to the same height as any portion of the roof within a fire separation distance where protection of wall openings is required but in no case shall the height be less than 30 inches 762 mm.