Placed in stud cavities, any min. 3-1/2 in. thick glass fiber insulation bearing the UL Classification Marking as to Surface Burning Characteristics and/or Fire Resistance.

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BXUV.V438 - Fire Resistance Ratings - ANSI/UL 2632

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Use these instructions to create your UL Product iQ account and search the certification database for UL fire-rated assemblies, designs or systems.

Nov 29, 2021 · At first glance I presumed it was protection from 1 side. But after review it indicates several places the design protects for fire from both sides. This seems contrary to other designs I have seen and my experience. Have others seen this design? Does it in fact protect from fire form both sides. See page 11. I appreciate any input. Brief edit.

Fire resistance assemblies and products are developed by the design submitter and have been investigated by UL for compliance with applicable requirements. The published information cannot always address every construction nuance encountered in the field.

Find UL Design U438 - 2 Hour Wall Assembly with a complete list of qualifying products on BuildSite. Download product data and MSDS here.

Here we present the components of fire rated UL Designs for wood framed floor/ceilings and the requirements needed for meeting sound control per Section 1207 of the International Building Code® (IBC®).