Parapet Roof Measurements

This is in response to your letter of january 28 1983 concerning perimeter protection at setback roof levels.

Parapet roof measurements.

The minimum height of a parapet wall above the roof surface is 30 inches. In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in height. Minimum of 12 to top of parapet. First of all commercial and multi unit residential buildings are a lot bigger than single family homes in most cases.

Skymeasure is a property measurement service created by roofing experts for roofing experts that provides a new level of accuracy simplicity and affordability. Know your measurements before you arrive and gain the confidence you need to expedite critical projects without ever having to set foot on a roof. 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. 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. Also there may be several roof penetrations and other obstacles that should be factored into the measurement. Top of parapet below cap to be sealed with fluid applied flashing. 2015 ibc code commentary.