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Sheet
Drawing No.
HILTI, Inc.
Date
Scale
1. GYPSUM WALL ASSEMBLY (UL/cUL CLASSIFIED U300, U400, V400, OR W400 SERIES) (1-HR. OR 2-HR.
FIRE-RATING) (2-HR. SHOWN).
2. WOOD STUDS TO CONSIST OF NOMINAL 2" x 4" LUMBER. STEEL STUDS TO BE MINIMUM 2-1/2" WIDE.
OPENING TO BE COMPLETELY "FRAMED-OUT" WITH ADDITIONAL FRAMING MEMBERS.
3. MAXIMUM 24" WIDE x 4" DEEP, ALUMINUM OR STEEL, OPEN LADDER OR SOLID BACK, CABLE TRAY.
4. CABLES TO BE ANY COMBINATION OF THE FOLLOWING :
A. MAXIMUM 300 PAIR NO. 24 AWG TELEPHONE CABLE.
B. MAXIMUM 750 KCMIL SINGLE CONDUCTOR POWER CABLE.
C. MAXIMUM 1/2" DIAMETER FIBER-OPTIC CABLE (24 FIBER).
D. MAXIMUM 3/C NO. 12 AWG METAL-CLAD CABLE.
5. HILTI CFS-BL FIRESTOP BLOCK (2" THICK x 8" WIDE x 5" DEEP, REFERENCE : FRONT VIEW) FIRMLY
PACKED AND CENTERED WITHIN WALL.
NOTES : 1. MAXIMUM SIZE OF OPENING = 900 SQ. IN., WITH A MAXIMUM DIMENSION OF 30".
2. ANNULAR SPACE [FOR STEEL STUD WALLS] = MINIMUM 0", MAXIMUM 26".
3. ANNULAR SPACE [FOR WOOD STUD WALLS] = MINIMUM 1", MAXIMUM 26".
4. CABLES TO FILL MAXIMUM 45% OF CROSS-SECTIONAL AREA OF CABLE TRAY BASED ON
A MAXIMUM 3" CABLE LOADING DEPTH.
5. APPLY HILTI FS-ONE INTUMESCENT FIRESTOP SEALANT, CP 618 FIRESTOP PUTTY STICK,
OR CP 620 FIRE FOAM, IN ANY VOID THAT MAY EXIST (INTO INTERSTICES OF CABLES,
BETWEEN CABLES AND CABLE TRAY, AND ANY VOIDS TO MAXIMUM EXTENT POSSIBLE.
6. FOR WALLS CONSTRUCTED OF STEEL STUDS LARGER THAN 3-5/8", FIRESTOP BLOCKS
SHOULD BE INSTALLED 8" DEEP. FIRESTOP BLOCKS MAY BE RECESSED MAXIMUM 1/2"
FROM SURFACE OF WALL.
7. WHEN ANNULAR SPACE EXCEEDS 12", A NOMINAL 1" HEXAGONAL STEEL WIRE MESH (20
GA. OR HEAVIER) OR NOMINAL 2" x 2" STEEL WIRE MESH (16 GA.) SHALL BE ATTACHED TO
BOTH SIDES OF THE WALL BY MEANS OF 1/4" HILTI TOGGLER BOLTS WITH 1-1/2"
DIAMETER FENDER WASHERS (SPACED MAX. 8" C/C) OR ATTACHED TO STEEL STUDS WITH
STEEL SCREWS AND 1-7/16" DIAMETER FENDER WASHERS (SPACED MAX. 6" C/C). STEEL
WIRE MESH SHALL BEGIN MAXIMUM 2-1/2" FROM THE PENETRANT AND OVERLAP MINIMUM
3" BEYOND THE PERIPHERY OF THE OPENING.
8. [NOT SHOWN] AS AN ALTERNATE TO WIRE MESH, STEEL PLATE (MIN. 22 GA.) MAY BE
USED. STEEL PLATE SHALL BE ATTACHED TO STEEL STRUTS (13/16" DEEP x 12 GA.) WITH
1/4" DIA. STEEL NUTS (SPACED 8" C/C). STRUT SHALL BE SECURED TO BOTH SURFACES
OF THE WALL ASSEMBLY WITH 1/4" DIA. TOGGLER BOLTS OR ATTACHED TO STEEL STUDS
WITH STEEL SCREWS AND WASHERS (SPACED MAX. 12" C/C).
WL
2 of 2
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UL/cUL SYSTEM NO. W-L-4081
F-RATING = 1-HR. OR 2-HR.
T-RATING = 0-HR.
CABLE TRAY THROUGH GYPSUM WALL ASSEMBLY
Tulsa, Oklahoma USA (800) 879-8000
4081b
Dec. 11, 2012
WL4081b.121112