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Abstract
FMRC has drafted a new specification test standard (4473) for testing the hail resistance of residential roofing material. The propsed new standard uses actual ice balls to provide a more realistic test for hail impact than the traditional steel ball impact test used today.
FMRC has drafted a new specification test standard (4473) for testing the hail resistance of residential roofing material. The propsed new standard uses actual ice balls to provide a more realistic test for hail impact than the traditional steel ball impact test used today.
Date
0/1999
0/1999
Author(s)
Factory Mutual
Factory Mutual
Page(s)
6-7
6-7
Source
Factory Mutual Research
Factory Mutual Research
Keyword(s)
ice; residential roofing; hail resistance standard
ice; residential roofing; hail resistance standard