Secure Offset/Return; Install Ceiling Firestops - Vermont Castings BE36 Installation Manual

D. Secure Offset/Return
When offsets and returns are joined to straight pipe sec-
tions, they must be locked into position with screws. To pre-
vent 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 5.3.
* Use # 6 or # 8 sheet metal screw, or larger, no longer
than 1/2 in. (13 mm).
WARNING! Risk of Fire!
• Secure offsets with screws (not to exceed 1/2 in./13 mm
In length).
• Secure returns with strapping.
• Straight chimney sections may be secured with screw
(not to exceed 1/2 in./13 mm In length) at the joints.
• Keep chimney sections from separating or twisting.
Straps
Optional
Additional
Support
Figure 5.3 Secure the Chimney
E. Install Ceiling Firestops
CAUTION! Risk of Fire! Ceiling firestops must be used
whenever the chimney penetrates a ceiling/floor.
• Chase construction requires ceiling firestops at each
floor or every 10 ft. (3.05 m) of clear space.
• The ceiling firestop slows spread of fire and reduces
cold air infiltration.
• Install a ceiling firestop whenever chimney penetrates
ceiling/floor.
• Mark and cut an opening in ceiling as shown in Figure 5.4.
• Frame the opening with the same size lumber used in
the ceiling joists.
• Nail the ceiling firestop to the bottom of the ceiling joists
when there is a room above.
• Use an attic insulation shield if the ceiling is insulated.
The ceiling firestop may then be attached above or below
the joists.
20 VCG Royalton Series • BE36/42 • 4044-197 Installation Manual • Rev A • 02/18/15
Ceiling
Firestop
Joint
Band
(Optional)
ROOM ABOVE (non-insulated ceiling)
B
Ceilng firestop
attached to bottom
of framing
ATTIC ABOVE (insulated ceiling)
Ceiling firestop
attached to top of
framing
2 in. (51mm)
clearance
Note:
Use same dimensional lumber for framing
ceiling firestop and joists.
Catalog # in.
FS338 14-1/2
FS339 14-1/2
FS340 14-1/2
Figure 5.4 Installing the Ceiling Firestop
WARNING! Risk of Fire! DO NOT seal area between
firestop opening and chimney pipe except where they en-
ter the attic or leave the warm air envelope of the home
(use 600° F sealant).
A
2 in. (51mm)
clearance
A B
mm in. mm
368 14-1/2 368
368 18-3/8 467
368 23 584