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B. Wall Penetration Framing/Firestops
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield firestop(s). The wall shield
firestop maintains minimum clearances and prevents cold
air infiltration.
These clearances are maintained by using an SLP-WS
(SLP pipe) or DVP-WS (DVP pipe). See Figure 5.2 for
framing instructions.
•
For external walls: The wall shield firestop is included
with the termination cap assembly.
•
For internal walls: A wall shield firestop must be pur-
chased and installed.
• The opening must be framed on all four sides using
the same size framing materials as those used in the
wall construction.
• SLP pipe - A wall shield firestop must be placed on
each side of an interior wall. A minimum 1-1/2 in. (38
mm) overlap of attached heat shields must be main-
tained.
• DVP pipe - A wall shield firestop is required on one
side only on interior walls. If your local inspector re-
quires a wall shield firestop on both sides, then both
wall shield firestops must have a heat shield (refer to
Section 12.A.) attached to them.
• See Section 7.F. for information for regarding the in-
stallation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by non-com-
bustible materials such as concrete, a hole with diameter
one inch greater than the pipe is acceptable.
Whenever a non-combustible wall is penetrated, the wall
shield firestop is only required on one side and no heat
shield is necessary.
Majestic • QUARTZ32, QUARTZ36, QUARTZ42 Installation Manual • 2412-980 Rev. Q • 3/19
10 in.
10 in.
10 in.
12 in.
A*
B*
Inches
QUARTZ32IN/IL
Millimeters
Inches
QUARTZ36IN/IL
Millimeters
Inches
QUARTZ42IN/IL
Millimeters
* Shows center of vent framing hole for top or rear venting.
The center of the hole is one (1) inch (25.4 mm) above the
center of the horizontal vent pipe.
Figure 5.2 Wall Penetration - DVP and SLP Pipe
C
D
A*
B*
C
37-7/16
24-3/8 36-7/16
23-3/8
951
619
926
41
27-7/8
40
26-7/8
1041
708
1016
43
29-7/8
42
28-7/8
1092
759
1067
D
594
683
733
35
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