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Sound Transmission Control |
 Tested per ASTM E90 & E413. Available in STC ratings of 40, 42, 43, 47, 48, 50, and 52 |
 Tested and labeled per UL752. Available in 8 levels of bullet resistant protection. |
 Approved door and frame components and assemblies for areas with windstorm force winds.
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 Tested and approved in accordance with FEMA 320 and 361 guidelines for storm shelters.
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