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Sheet
Drawing No.
HILTI, Inc.
Date
Scale
Saving Lives through Innovation and Education
Hilti Firestop Systems
Plano, Texas USA (800) 879-8000
NOTE : ANNULAR SPACE = MINIMUM 0", MAXIMUM 1/2".
1. GYPSUM WALL ASSEMBLY (UL/cUL CLASSIFIED U300, U400, V400, OR W400 SERIES) (1-HR. OR 2-HR.
FIRE-RATING) (2-HR. SHOWN) TO CONSIST OF THE FOLLOWING FEATURES :
A. MINIMUM 6" WIDE STEEL STUDS SPACED A MAXIMUM 24" O.C. VERTICAL FRAMING MEMBER TO BE
LOCATED WITHIN 3/4" TO EACH SIDE OF STEEL BOX. AN ADDITIONAL FRAMING MEMBER SHALL BE
USED BELOW THE STEEL BOX TO FORM A SHELF WITHIN THE WALL CAVITY TO SUPPORT THE STEEL
BOX.
2. STEEL BOX (18 GA. OR HEAVIER) WITH MAXIMUM DIMENSIONS OF 20-1/8" WIDE BY 42" HIGH BY 5-3/4"
DEEP AND WITH INTEGRAL STEEL HINGED DOOR. BOX TO BE FLUSH MOUNTED AND PROVIDED WITH
MOUNTING TRIM THAT OVERLAPS ONTO GYPSUM WALL BOARD. SECURE STEEL BOX ON BOTH SIDES
TO VERTICAL STUDS WITH FOUR TOGGLE BOLTS (TWO AT TOP AND TWO AT BOTTOM) LOCATED WITHIN
12" FROM TOP AND BOTTOM OF BOX.
3. BOTTOM AND/OR TOP OF BOX MAY BE PENETRATED BY UP TO NINE (9) OF THE FOLLOWING ITEMS,
WITH EACH ITEM CONNECTED TO BOX WITH CONDUIT FITTINGS :
A. MAXIMUM 2" NOMINAL DIAMETER STEEL CONDUIT (MAX. QTY. = 5).
B. MAXIMUM 1" NOMINAL DIAMETER FLEXIBLE STEEL CONDUIT (MAX. QTY. = 4).
4. HILTI CFS-PA FIRESTOP PUTTY PAD INSTALLED IN ONE LAYER TO COVER THE TOP, SIDES, AND BACK
OF STEEL BOX FOR 1-HR. AND 2-HR. CONDITIONS. FOR 2-HR. CONDITIONS ONLY, AN ADDITIONAL LAYER
OF PUTTY PAD (TWO TOTAL LAYERS) SHALL BE INSTALLED ON THE BACK OF THE STEEL BOX. NO
PUTTY INSTALLED ON BOTTOM OF BOX. HILTI CFS-PA FIRESTOP PUTTY PAD SHALL OVERLAP A MIN. 1/2"
ONTO STEEL CONDUIT/FITTINGS. HILTI CFS-PA TO BE BUTTED TIGHTLY TOGETHER AT ALL MATING
EDGES.
5. MINIMUM 1/2" DEPTH HILTI FS-ONE MAX INTUMESCENT FIRESTOP SEALANT OR HILTI CP 618 FIRESTOP
PUTTY STICK TO BE INSTALLED WITHIN EACH OPEN END OF THE CONDUITS WHICH TERMINATE WITHIN
THE BOX.
6. ANY UL/cUL LISTED R19 GLASS FIBER BATT INSULATION OR MINERAL WOOL INSULATION TO FILL STUD
CAVITY WHERE STEEL BOX IS INSTALLED, AND ADJACENT STUD CAVITIES. PIECES OF INSULATION TO
BE INSTALLED TO FILL VOIDS AROUND STEEL BOX AND ANY PENETRANTS.
WL
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2 of 2
-
Aug. 16, 2018
UL/cUL SYSTEM NO. W-L-7277
F-RATING = 1-HR. OR 2-HR.
T-RATING = 1-HR. OR 2-HR.
tiTOTT~KMUNSNU
METALLIC BOX THROUGH GYPSUM WALL ASSEMBLY