Hail Resistance of Roofing ProductsBuilding Research Division, U.S. Institute for Applied Technology, 1969 - 9 pages |
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Page 3
Hailstone Carriers of a metal frame of 34 - in ( 1.9 cm ) angle iron on which are mounted two microswitches 2.0 ft The hail carriers were made from 3 - in ( 7.6 ( 61 cm ) apart . The actuating levers on the cm ) diameter foamed ...
Hailstone Carriers of a metal frame of 34 - in ( 1.9 cm ) angle iron on which are mounted two microswitches 2.0 ft The hail carriers were made from 3 - in ( 7.6 ( 61 cm ) apart . The actuating levers on the cm ) diameter foamed ...
Page 5
Wood , slate , asbestos cement , tile , and sheet metal roofing were applied as directed by their suppliers to decks supported on 2 in x 4 in rafters , 2 ft ( 61 cm ) on centers . The built - up roofing specimens , 1 ft ( 30.5 cm ) ...
Wood , slate , asbestos cement , tile , and sheet metal roofing were applied as directed by their suppliers to decks supported on 2 in x 4 in rafters , 2 ft ( 61 cm ) on centers . The built - up roofing specimens , 1 ft ( 30.5 cm ) ...
Page 8
The levels of failure used in these evaluations were cracking for brittle roofings and objectionable indentations for metal roofing . Table 4 is a summary of the results of these tests . Diameter of smallest hailstone causing damage ...
The levels of failure used in these evaluations were cracking for brittle roofings and objectionable indentations for metal roofing . Table 4 is a summary of the results of these tests . Diameter of smallest hailstone causing damage ...
Page 9
Standing seam terne metal • • Dents proportional to hail size - visible for all hailstone sizes . The plywood deck cracked below the dents with hailstones larger than 2 % in ( 6.4 cm ) . Note tested . All roofings tested were vulnerable ...
Standing seam terne metal • • Dents proportional to hail size - visible for all hailstone sizes . The plywood deck cracked below the dents with hailstones larger than 2 % in ( 6.4 cm ) . Note tested . All roofings tested were vulnerable ...
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15 cents apparatus Applied approximate areas asbestos cement asphalt Base sheet better building Built-up roofs Bureau of Standards carrier cast caused Center cents Class compressed Concrete consists construction contain conventional counter cracking cylinder deck dents developed diameter divisions Effect energy Evaluating failure fall Fiberboard figure Fire float flood coat formed freezing glass fiber Government hail damage hail resistance hailstones Hailstorms impact increases indentation industry Institute insulation interply kg/m l-in larger layer lbs/sq materials measurement membrane metal Meteorol mold National Bureau occur Office organic felt performed permitted physical plywood preparation Processing Properties provides Reference reported Research Resistance of Roofing resistant to hail shingles showed sizes slag solidly specimen stones storm structure substrates supported surface tape technical Technology tend terminal velocities tested Type underlayment United usually various vulnerability Washington weather
Bibliographic information
| Title | Hail Resistance of Roofing Products Volume 23 of Building science series, United States National Bureau of Standards Volume 23 of National Bureau of Standards building science series |
| Author | Sidney H. Greenfeld |
| Contributor | Institute for Applied Technology (U.S.). Building Research Division |
| Publisher | Building Research Division, U.S. Institute for Applied Technology, 1969 |
| Original from | the University of Michigan |
| Digitized | 18 Aug 2006 |
| Length | 9 pages |
| Export Citation | BiBTeX EndNote RefMan |