An electrical metallic tubing penetrates a framed wall assembly consisting of studs and gypsum board. The annular space around the tubing is sealed with a fill, void or cavity material satisfying ANSI/UL1479 and CAN/ULC S115 standards. The assembly achieves one and two hour F and T ratings with specified air leakage ratings at ambient and four hundred degrees Fahrenheit.
1. WALL ASSEMBLY A. STUDS B. GYPSUM BOARD* 2. ELECTRIC METALLIC TUBING (EMT) 3. FILL, VOID OR CAVITY MATERIAL* ANSI/UL1479 (ASTM E814) CAN/ULC S115 F Ratings — 1 and 2 Hr (See Item 1) T Ratings — 1 and 2 Hr (See Item 3) L Rating at Ambient — Less than 1 CFM/sq ft L Rating at 400° F — 4 CFM/sq ft F Ratings — 1 and 2 Hr (See Item 1) FT Ratings — 1 and 2 Hr (See Item 3) FH Ratings — 1 and 2 Hr (See Item 1) FTH Ratings — 1 and 2 Hr (See Item 3) L Rating at Ambient — Less than 1 CFM/sq ft L Rating at 400° F — 4 CFM/sq ft UL SYSTEM NO. W-L-1095 (HILTI) 1A 1B 2 3 SECTION A-A A A 2 3
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