F. Double-check the Chimney Assembly
Continue assembling the chimney sections up through the ceiling firestops as needed. While doing so, be aware of the height and unsupported chimney length limitations given un- der Section 5.A. Chimney Requirements.
Check each section by pulling up slightly from the top to en- sure proper engagement before installing the succeeding sections. If they have been connected correctly, they will not disengage when tested.
G. Secure the Chimney
Straps
Ceiling Firestop
Joint
Band
When offsets and returns are joined to straight pipe sections, they must be locked into position with the screws provided* (outer only), using the predrilled holes. To prevent gravity from pulling the chimney sections apart, the returns and the chimney stabilizers have hanger straps for securing these parts to joists or rafters. See Figure 5.9.
*or equivalent #6 or #8 sheet metal screw no longer than 3/4 in. (19 mm).
WARNING
Fire Risk
•Secure offsets with screws (not to exceed 3/4 in./19 mm in length).
•Secure returns with strapping.
•Straight chimney sections may be secured with screws (not to exceed 3/4 in./19 mm in length) at the joints.
Keep chimney sections from separating or twisting.
Optional(Optional)
Additional
Support
Figure 5.9 Secure the Chimney
Heat & Glo • | 21 |
