Page text

Sheet
Drawing No.
HILTI, Inc.
Date
Scale
WL
1441b
1 of 1
3/16" = 1"
Aug. 22, 2014
UL/cUL SYSTEM NO. W-L-1441
F-RATING = 1-HR. OR 2-HR.
T-RATING = 1/2-HR. OR 3/4-HR.
WL1441b.082214
METAL PIPE THROUGH GYPSUM WALL ASSMEBLY
A
A
SECTION A-A
FRONT VIEW
Tulsa, Oklahoma USA (800) 879-8000
1
2
3
NOTES : 1. MAXIMUM DIAMETER OF OPENING = 2-1/2" (FOR 2" DEVICE) OR 4-1/2" (FOR 4" DEVICE).
2. ANNULAR SPACE BETWEEN DEVICE AND PERIPHERY OF OPENING = MINIMUM 0".
3. [OPTIONAL] AS AN ALTERNATE TO SMOKE GASKET, MINIMUM 1/2" DEPTH HILTI FS-ONE
INTUMESCENT FIRESTOP SEALANT OR HILTI CP 606 FLEXIBLE FIRESTOP SEALANT FLUSH WITH
BOTH SURFACES OF WALL WITH AN ADDITIONAL 1/4" BEAD APPLIED AT POINT OF CONTACT.
1. GYPSUM WALL ASSEMBLY (UL/cUL CLASSIFIED U300, U400 OR V400 SERIES) (1-HR. OR 2-HR.
FIRE-RATING) (2-HR. SHOWN) TO INCLUDE THE FOLLOWING CONSTRUCTION FEATURES :
A. [NOT SHOWN] WOOD STUDS TO CONSIST OF NOMINAL 2" x 4" LUMBER (SPACED MAXIMUM 16" OC).
STEEL STUDS TO BE MINIMUM 3-1/2" WIDE (SPACED MAXIMUM 24" OC).
B. NOMINAL 5/8" THICK GYPSUM WALLBOARD. TYPE, NUMBER OF LAYERS, AND SHEET ORIENTATION
AS SPECIFIED IN THE INDIVIDUAL UL DESIGN.
2. PENETRATING ITEM TO BE ONE OF THE FOLLOWING :
A. MAXIMUM 3" NOMINAL DIAMETER STEEL PIPE (SCHEDULE 5 OR HEAVIER).
B. MAXIMUM 3" NOMINAL DIAMETER CAST OR DUCTILE IRON PIPE.
C. MAXIMUM 3" NOMINAL DIAMETER STEEL CONDUIT OR EMT.
3. HILTI CP 653 SPEED SLEEVE (2" OR 4") SLID INTO AND CENTERED WITHIN WALL. DEVICE FLANGES SPUN
CLOCKWISE ONTO DEVICE THREADS OVER SMOKE GASKET, BUTTING TIGHTLY TO BOTH SIDES OF WALL.