Hail Resistance of Roofing ProductsBuilding Research Division, U.S. Institute for Applied Technology, 1969 - 9 pages A test was developed for evaluating the hail resistance of roofings, in which synthetic hailstones (ice spheres) of various sizes were shot at roof assemblies at their free-fall terminal v * elocities.Indentations, granule loss and roofing fracture were observed.The principal conclusion is that:All roofing materials have some resistance to hail damage, but as the size of the hail increases, a level of impact energy is reached at which damage occurs.This level lies in the range of 1 1/2 to 2 inch (3.8-5.1 cm) hailstones for most prepared roofings.(Author). |
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Page 1
... storm damage . 1. Introduction Each pin represents a storm in which at least $. Hail , as a destructive force of nature , has plagued man , his crops and his property since the very beginnings of civilization . By far the vast majority ...
... storm damage . 1. Introduction Each pin represents a storm in which at least $. Hail , as a destructive force of nature , has plagued man , his crops and his property since the very beginnings of civilization . By far the vast majority ...
Page 2
Sidney H. Greenfeld. Each pin represents a storm in which at least $ 5,000 worth of building damage was done by hail . 2. Apparatus The hail resistance of building materials was determined. FIGURE 1. Hail storm distribution map . 7 ...
Sidney H. Greenfeld. Each pin represents a storm in which at least $ 5,000 worth of building damage was done by hail . 2. Apparatus The hail resistance of building materials was determined. FIGURE 1. Hail storm distribution map . 7 ...
Page 3
... storm . This type of storm tends to drop its hailstones at about 6000 ft . Figure 1 is a map of the central United States showing the distribution of storms during the years 1960-1966 in which at least $ 5000 worth of building damage ...
... storm . This type of storm tends to drop its hailstones at about 6000 ft . Figure 1 is a map of the central United States showing the distribution of storms during the years 1960-1966 in which at least $ 5000 worth of building damage ...
Page 9
... Storm Data , Environmental Science Services Ad- ministration , U.S. Department of Commerce , Asheville , N.C. [ 2 ] ... Storms , Rough Notes 82 , 14 , 1939 . [ 8 ] Fuchs , E. R. , Hailstorm , American Roofer 10 ( Nov. 1955 ) . [ 9 ] Laurie ...
... Storm Data , Environmental Science Services Ad- ministration , U.S. Department of Commerce , Asheville , N.C. [ 2 ] ... Storms , Rough Notes 82 , 14 , 1939 . [ 8 ] Fuchs , E. R. , Hailstorm , American Roofer 10 ( Nov. 1955 ) . [ 9 ] Laurie ...
Common terms and phrases
15 cents air gun apparatus Applied Technology areas of different asbestos cement asphalt flood coat Asphalt Roofing asphalt shingles automatic data processing building damage Building Research Building Science Series Built-up roofs Bureau of Standards Cement and Concrete Center Class C shingle Coal tar Concrete Properties cracking cylinder dense decks dents DEPARTMENT OF COMMERCE diameter different vulnerability felt damage Fiberboard on 1-in Foamboard free-fall terminal velocity freezing ft 61 cm Gas cylinder Glass fiber insulation hail damage hail resistance hailstone carrier Hailstone Molds ice spheres impact indentation Institute for Applied interply asphalt Interrelations Between Cement Joules kg/m² kg/m³ large hailstones launcher lb/sq Meteorol microswitches National Bureau Nonbituminous Roofing organic felts polyethylene Portland Cement prepared roofings Products Sidney H reported Resistance of Roofing resistant to hail shingles showed sizes of hailstones slag solidly supported areas specimen steel decking substrates tested Type 235 shingles U.S. DEPARTMENT U.S. Government Printing velocity 9