41978-1-1220
Page 30
FRAMING AND FINISHING
INSTALLING SUPPORT BRACKETS
Install a horizontal pipe support used for each 3 feet of horizontal
run to framing members. Allow 3 inch clearance to combustibles
above 8 inch diameter pipe and elbows, and 1 inch clearance to
both sides and bottom.
Support vertical runs of this vent systems every 4 feet using wall
brackets attached to the vent pipe, then secured with nails or
screws to structural framing.
TO COMBUSTIBLES
TO COMBUSTIBLES
Figure 33
INSTALLING FIRESTOPS
Firestops are required for safety whenever the vent system passes
through an interior wall, an exterior wall, or a ceiling. These
firestops act as a firebreak heat shield and as a means to insure
that minimum clearances are maintained to the vent system.
HORIZONTAL FIRESTOPS
Horizontal runs in the vent system which pass through either
interior or exterior walls, require the use of wall firestops on both
sides of the wall through which the vent passes.
Position the firestops on both sides of the framed hole, previously
cut.
See Figure 34.
Secure firestop with nails or screws.
Continue the vent run through the firestops.
11”
(297 mm)
MIN.
9 1/8”
(232 mm)
MIN.
OUTSIDE THIMBLE ASSEMBLY
INSIDE THIMBLE ASSEMBLY
EXTERIOR
SHEAVING
Figure 34
STUD WALL
1" MIN.(25.4mm)
TO COMBUSTIBLES
FLUE OUTLET
48"
(1219mm)
PIPE STRAP
11" (297 mm)
MIN.
OUTSIDE THIMBLE ASSEMBLY
EXTERIOR
SHEAVING
INSIDE THIMBLE
ASSEMBLY
9 1/8" (232 mm)
MIN.