Gilkey Windows Structural Performance:
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Watertightness is measured by projecting the equivalent of 5 U.S. gallons of water per hour per square foot of window area - the equivalent of 8 in. of rain in 1 hour. Air pressure is increased to simulate winds varying between 35 and 76 mph. Rating indicate the pressure attained without any interior water leakage.
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| * Beyond the scope of the standard The results are from national tests under the following standards: |
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