Fire Protection · E-RXHSV

UL Firestop System W-L-1252

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This drawing outlines UL System No. W-L-1252, classified by Underwriters Laboratories, Inc. in accordance with ANSI/UL 1479 (ASTM E814) and CAN/ULC S115 standards. It establishes F, T, FT, FH, and FTH ratings spanning one to four hours, alongside ambient and 400-degree Fahrenheit air leakage ratings of less than one cubic foot per minute per square foot. The schedule details performance criteria matched to specific assembly items and components shown in the associated penetration detail.

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