Parapet Roof Measurements

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

Parapet roof measurements.

Height of roofing at wall. Measuring a flat roof on a typical commercial building with a parapet can be arduous and complicated. 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. First of all commercial and multi unit residential buildings are a lot bigger than single family homes in most cases.

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. In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in height. Skymeasure is a property measurement service created by roofing experts for roofing experts that provides a new level of accuracy simplicity and affordability.

Do not lap tpo over top of parapet unless required by unique construction conditions. The minimum height of a parapet wall above the roof surface is 30 inches. Also there may be several roof penetrations and other obstacles that should be factored into the measurement. 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.