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American Metal
7.6.5 Rafter protection
Rafter protectors, at the roof level, must be installed with this unit, if the chimney is enclosed at
the attic level. Rafter protectors must be made of 22 ga or more galvanized steel and must have
at least the dimension presented on the following diagram:
7.7
Angled wall radiation shield
When passing through a combustible wall with the chimney at a 30
or 45 angle (30 or 45 in Canada and 30 only in the USA), an angled
firestop or wall radiation shield provided by the chimney
manufacturer must be installed. Only one is required. Follow the
chimney manufacturer's installation instructions.
In cold climate locations, it is recommended that you use the
insulated wall radiation shield since it will maintain the home's
A
INSULATED WALL RADIATION SHIELD
B
GYPROCK
C
INSULATED WALL
7.8
Chimney support installation
7.8.1 Universal roof support
This support has three possible uses:
1. It must be used on a roof to support the chimney.
2. It may be used on a floor, ceiling or roof above an offset to support the chimney above the offset.
3. It may be used on a floor, ceiling or roof as a supplementary support.
HORIZON – Installation and Operation Manual
• Chimney cannot be enclosed at the
attic level.
10.44"
2" Solid Pack : Dura Tech
Premium, Dura Plus HTC
AC Triple Wall : Dura Plus
AC Triple wall: HS, HSS
1.530"
5.126"
.512"
thermal barrier.
57
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