Flat Roof Parapet Height

2015 ibc code commentary.

Flat roof parapet height.

Top of parapet below cap to be sealed with fluid applied flashing. Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection. Measuring a flat roof on a typical commercial building with a parapet can be arduous and complicated. At the highest point of the sloped roof the parapet is about 10 tall at the lowest point the parapet is about 14 tall.

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. First of all commercial and multi unit residential buildings are a lot bigger than single family homes in most cases. Height of roofing at wall.

The parapet height may have to have a minimum height if it is part of a fire rated assembly between units depending upon the use and classification of the structure. Also there may be several roof penetrations and other obstacles that should be factored into the measurement. There are several solutions to help you raise the height of your parapet that are cost effective and aesthetically pleasing. Like any roof with batt.

Minimum of 12 to top of parapet. In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in height. The assembly is straight forward but what complicates matters is that the roof needs to be vented. It is used at a single ply roof membrane sloped per foot to a gutter like on the bainbridge residence that we designed and built above.