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13369-1-0203 Page 19
DVS-30 FRAMING AND FINISHING
Installing Support Brackets (Figure 29)
A horizontal pipe support MUST BE used for each 3 feet of
horizontal run. The pipe supports should be placed around 8 inch
diameter pipe and nailed in place to framing members. There
MUST BE a 3 inch clearance to combustibles above 6 5/8 inch
diameter pipe and elbows and 1 inch clearance on both sides and
bottom of 6 5/8 inch pipe to combustibles on all horizontal pipe
sections and elbows.
Vertical runs of this vent systems must be supported every 4
feet above the appliance flue outlet by wall brackets attached
to the 6 5/8 inch vent pipe and secured with nails or screws
to structural framing members.
Figure 29
Installing Firestops (Figures 30, 31, 32 and 33)
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 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 10 inch x 10 inch hole,
previously cut. Secure with nails or screws. The heat shields of
the firestops MUST BE placed towards the top of the hole.
Continue the vent run through the firestops. (Figure 30)
Figure 30
Vertical runs of this system which pass through ceilings require
the use of ONE (1) ceiling firestop at the hole in each ceiling
through which the vent passes.
Position a plumb bob directly over the center of the vertical vent
component and mark the ceiling to establish the center point of
the vent. Drill a hole or drive a nail through this center point and
check the floor above for any obstructions such as wiring or
plumbing runs. Reposition the appliance and vent system, if
necessary, to accommodate ceiling joists and/or obstructions.
Cut a 10 inch x 10 inch hole through the ceiling, using the center
point previously marked. Frame the hole with framing lumber the
same size as the ceiling joists. (See Figure 31) If the area above
the ceiling is NOT an attic, position and secure the ceiling firestop
(SD-963) on the ceiling side of the previously cut and framed
hole. (See Figure 32) If the area above the ceiling IS an attic,
position and secure the firestop on top of the previously framed
hole. (See Figure 33)
NOTE: Remove insulation from the framed area in the attic
before installing the firestop and/or vent pipes.