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to avoid obstructions such as rafters, ridgepoles, or joists, use no more than
two 30° offsets in any one chimney system.
1. Attach Elbows: Attach Elbow to Chimney Section or other Elbow. Please
be noticed that the female end of the elbows are not lanced, in order to ensure
proper alignment of the chimney system can be maintained. Locking bands
must be used at all chimney joints. Attach one Elbow to the Chimney Section
below, and align it for the offset. Refer to Table 2 to determine the required
offset length and attach an appropriate length (or lengths) of Chimney
Section(s) above the Elbow. The maximum length of chimney pipe between
elbows is not to exceed 72" (maximum of two chimney sections only). Attach
the second Elbow above the Chimney Section to complete the offset (Fig 13).
2. Secure Offset: Place the Elbow Strap's band around the angled portion of
the top Elbow, then tighten the nut and bolt until the clamp is firm. Wrap the
Elbow Strap end over an adjacent joist or rafter and secure it with at least (2)
8-penny nails or (2) #8, 1-1/2 screws. Do not add more Chimney Sections until
the Elbows are supported. Be sure that the chimney remains vertical. If there is
more than one Chimney Section between the Elbows, install a second Elbow
Strap around the joint of the two Chimney Sections (Fig 13).
ROOF BRACE INSTALLATION
If the chimney extends more than 5 feet above the roofline, a Roof Brace must
be installed at every 5-foot increment of chimney height above the roofline,
Fig 13
leaving no more than 5 feet of chimney extending above the last Roof Brace.
The Roof Brace consists of the Pipe Band, the Adjustable Legs, and the Roof
Brackets.
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