Heat & Glo • Soho-CE • 2111-900 Rev. i • 10/10
15
B. Wall Penetration Framing
Combustible Wall Penetration
Frame a hole in a combustible wall for an interior wall
shield fi restop, (Figure 6.2) whenever a wall is penetrated.
Use same size framing materials as those used in the wall
construction. The wall shield fi restop maintains minimum
clearances and prevents cold air infi ltration. A wall shield
fi restop must be placed on each side of an interior wall.
A minimum 4cm overlap of attached heat shield must be
maintained. See Figure 6.3.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by noncombustible
materials such as concrete, a hole with diameter 2.54
cm greater than the pipe is acceptable. Whenever
a non-combustible wall is penetrated, the wall shield
fi restop is only required on one side and no heat shield
is necessary.
Figure 6.2 Exterior Wall Hole
A
B
* Shows center of fl ue framing hole. The center of the hole is
2.54 cm above the center of the horizontal fl ue pipe.
Fire Risk.
Explosion Risk.
Maintain fl ue clearance to combustibles as
specifi ed.
• Do not pack air space with insulation or other
materials.
Failure to keep insulation or other materials
away from fl ue pipe may cause fi re.
Figure 6.1 Pipe Clearances
7.62 cm TOP
CLEARANCE
2.54 cm CLEARANCE
AROUND VERTICAL
SECTIONS
2.54 cm SIDE AND
BOTTOM CLEARANCE
WARNING
A*
B
97.1 cm
94.6 cm
A. Pipe Clearances to Combustibles
6
6
Flue Clearances and Framing
Figure 6.3 Heat Shield, Interior & Exterior Wall Shield Firestops
TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
WALL SHIELD
FIRESTOP
(INTERIOR)
HEAT SHIELD
WALL SHIELD
FIRESTOP
(EXTERIOR)
