Hail Resistance of Roofing ProductsBuilding Research Division, U.S. Institute for Applied Technology, 1969 - 9 pages |
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Page 1
... hail . stones ( ice spheres ) of various sizes were shot at roof assemblies at their free - fall terminal velocities . ... but as the size of the hail increases , a level of impact energy is reached at which damage occurs .
... hail . stones ( ice spheres ) of various sizes were shot at roof assemblies at their free - fall terminal velocities . ... but as the size of the hail increases , a level of impact energy is reached at which damage occurs .
Page 3
The velocities were controlled by the size of the charge in the blank cartridges used in the launcher . ... However , it was decided to use a less complicated launcher , use " hailstones " of various sizes , cast the " hailstones " to ...
The velocities were controlled by the size of the charge in the blank cartridges used in the launcher . ... However , it was decided to use a less complicated launcher , use " hailstones " of various sizes , cast the " hailstones " to ...
Page 4
Thus , when the two hemicylinders were reassembled , they formed carriers for the several sizes of hailstones and permitted one size barrel to be used for all of the hailstones . Carriers with recesses for 112 ( 3.8 cm ) , 2 ( 5.1 cm ) ...
Thus , when the two hemicylinders were reassembled , they formed carriers for the several sizes of hailstones and permitted one size barrel to be used for all of the hailstones . Carriers with recesses for 112 ( 3.8 cm ) , 2 ( 5.1 cm ) ...
Page 5
A hailstone of the desired travel immediately in front of the test specimen size was taken from the freezer , cleaned ... limits for the hailstone sizes used : of ice spheres falling at about their free - fall terminal velocity [ 9 ] .
A hailstone of the desired travel immediately in front of the test specimen size was taken from the freezer , cleaned ... limits for the hailstone sizes used : of ice spheres falling at about their free - fall terminal velocity [ 9 ] .
Page 6
All of the results reported are based on hailstones of a given size traveling at velocities within + 10 percent of the terminal velocities reported in table 1 for hailstones of that size . The results are reported under the types of ...
All of the results reported are based on hailstones of a given size traveling at velocities within + 10 percent of the terminal velocities reported in table 1 for hailstones of that size . The results are reported under the types of ...
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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 |