This is in response to your letter of january 28 1983 concerning perimeter protection at setback roof levels.
Parapet roof height.
In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in height.
You should not increase the height of a parapet wall without involving a structural engineer.
There are several solutions to help you raise the height of your parapet that are cost effective and aesthetically pleasing.
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.
Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection.
Cavity wall thickness and parapet heights thickness parapet height h to be not more than.
Courtesy of max baker and the national research council of canada.
T 1 t 2 equal or less than 200.
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.
With it parapet walls are indicated automatically on the roof sketch as flattened panels similar to an unfolded pizza box.
The minimum height of a parapet wall above the roof surface is 30 inches.
The parapet itself is standard wood framing with an applied siding in this case t g 1 4 cedar.
How far can the brick parapet be increased without bracing or reinforcing it.
The assembly is straight forward but what complicates matters is that the roof needs to be vented.
Do not lap tpo over top of parapet unless required by unique construction conditions.
Minimum of 12 to top of parapet.
A parapet height of 29 inches where employees are exposed to falls from a roof does not comply with the height requirement in 29 cfr 1910 23 e 1 and can not be considered acceptable by osha.
T 1 t 2 greater than 200 equal to or less than 250.
Height of roofing at wall.
At the highest point of the sloped roof the parapet is about 10 tall at the lowest point the parapet is about 14 tall.
