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Sheet
Drawing No.
HILTI, Inc.
Date
Scale
1. CONCRETE WALL ASSEMBLY (2-HR. FIRE-RATING) :
A. LIGHTWEIGHT OR NORMAL WEIGHT CONCRETE WALL (MINIMUM 6" THICK).
B. ANY UL/cUL CLASSIFIED CONCRETE BLOCK WALL.
2. MAXIMUM 100" x 100" RECTANGULAR SHEET METAL DUCT (CONSTRUCTED AND REINFORCED IN
ACCORDANCE WITH SMACNA CONSTRUCTION STANDARDS).
3. MINIMUM 5/8" DEPTH HILTI FS-ONE INTUMESCENT FIRESTOP SEALANT OR HILTI CP 606 FLEXIBLE
FIRESTOP SEALANT.
4. [NOT SHOWN] MINIMUM 1/4" BEAD HILTI FS-ONE INTUMESCENT FIRESTOP SEALANT OR HILTI CP 606
FLEXIBLE FIRESTOP SEALANT APPLIED AT POINT OF CONTACT, PRIOR TO ATTACHMENT OF STEEL
ANGLE.
5. STEEL RETAINING ANGLE (SEE NOTE NO. 3 AND TABLE BELOW).
NOTES : 1. MAXIMUM SIZE OF OPENING = 104" x 102".
2. ANNULAR SPACE = MINIMUM 0", MAXIMUM 2".
3. AFTER SEALING SPACE BETWEEN DUCT AND CONCRETE WALL ASSEMBLY WITH HILTI
FIRESTOP SEALANT, FASTEN STEEL ANGLE (MIN. 18 GA. FOR DUCTS 48" x 24" OR
SMALLER, OTHERWISE MIN. 16 GA.) TO DUCT WITH MINIMUM NO. 10 SHEET METAL
SCREWS (SPACED MAXIMUM 1" FROM EACH END OF STEEL DUCT AND SPACED
MAXIMUM 6" C/C). STEEL ANGLE TO OVERLAP DUCT BY MINIMUM 2" AND CONCRETE
WALL ASSEMBLY BY MINIMUM 1". ANGLE DOES NOT HAVE TO BE FASTENED TO
CONCRETE WALL ASSEMBLY.
4. [OPTIONAL] POLYETHYLENE BACKER ROD, MINERAL WOOL, OR GLASS-FIBER BATT
INSULATION MAY BE USED AS BACKING MATERIAL FOR FIRESTOP SEALANT (EXCEPT
WHERE REQUIRED IN TABLE ABOVE).
WJ
2 of 2
-
UL/cUL SYSTEM NO. W-J-7109
SHEET METAL DUCT THROUGH CONCRETE WALL OR BLOCK WALL ASSEMBLY
Tulsa, Oklahoma USA (800) 879-8000
MAXIMUM
DUCT
DIMENSION
DUCT
THICKNESS
ANNULAR SPACE
MIN. - MAX.
MINERAL WOOL REQUIRED
RETAINING
ANGLE
REQUIRED
24 IN.
24 GA.
1/2" - 1"
MINIMUM 5" THICKNESS MINERAL WOOL
(MIN. 4 PCF DENSITY) TIGHTLY PACKED
NO
(OR HEAVIER)
7109c
June 16, 2014
F-RATING = 2-HR.
T-RATING = 0-HR.
L-RATING AT AMBIENT = LESS THAN 1 CFM /SQ FT
L-RATING AT 400°F = LESS THAN 1 CFM / SQ FT
WJ7109c.061614