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Abstract
Designers, researchers, manufacturers, contractors, and building owners need to be aware of the recent code changes that limit gravel-surfaced built-up roofing (BUR), including their outright ban in hurricane-prone regions. In response to these code changes, ARMA recently conducted research based on the Kind-Wardlaw (K-W) wind-tunnel studies and design method. Results demonstrate that the use of aggregate-surfaced roofing systems is a viable option in high-wind areas with appropriate aggregate sizing and parapet design. This paper provides a review and analysis of current building code requirements for aggregate-surfaced BUR systems. Also addressed are recommended (proposed) building code requirements for aggregate sizing and parapet heights to control aggregate blow-off based on the modified K-W design method.
Designers, researchers, manufacturers, contractors, and building owners need to be aware of the recent code changes that limit gravel-surfaced built-up roofing (BUR), including their outright ban in hurricane-prone regions. In response to these code changes, ARMA recently conducted research based on the Kind-Wardlaw (K-W) wind-tunnel studies and design method. Results demonstrate that the use of aggregate-surfaced roofing systems is a viable option in high-wind areas with appropriate aggregate sizing and parapet design. This paper provides a review and analysis of current building code requirements for aggregate-surfaced BUR systems. Also addressed are recommended (proposed) building code requirements for aggregate sizing and parapet heights to control aggregate blow-off based on the modified K-W design method.
Date
3/2010
3/2010
Author(s)
Jay Crandell; Michael Fischer
Jay Crandell; Michael Fischer
Page(s)
21-32
21-32
Source
Roof Consultants Institute
Roof Consultants Institute
Keyword(s)
aggregate blow off; BUR; wind tunnel; building code; aggrate surfacing;
aggregate blow off; BUR; wind tunnel; building code; aggrate surfacing;