D. Secure Offset/Return
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 eilin esto
eneve i ne enet ates
eilin / oo
• Ma an ut an o enin in eilin as s o n in i u e 6 6
•
a e t e o enin it t e sa e si e lu
e use in
t e eilin oists
• Nail t e eilin esto to t e otto o t e eilin oists
en t e e is a oo a ove
•
se an atti insulation s iel i t e eilin is insulate
T e eilin esto a t en e atta e a ove o elo
t e oists
R O O M A B O V E ( no n- ins u l a t e d c e il ing )
A T T I C A B O V E ( ins u l a t e d c e il ing )
B
A
C e il ng f ir e s t o p
a t t a c h e d t o b o t t o m
o f f r a m ing
C e il ing f ir e s t o p
a t t a c h e d t o t o p o f
f r a m ing
N ote:
U s e s a m e d im e ns io na l l u m b e r f o r f r a m ing
c e il ing f ir e s t o p a nd j o is t s .
2 in. ( 5 1 m m )
c l e a r a nc e
2 in. ( 5 1 m m )
c l e a r a nc e
Catalog #
A
B
in.
mm
in.
mm
S338
14-1/2
368
14-1/2
368
S33
14-1/2
368
18-3/8
46
S340
14-1/2
368
23
584
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).
Figure 6.6
Installing the Ceiling Firestop
en o sets an etu ns a e oine to st ai t i e se
-
tions t e ust e lo e into osition it t e s e s
ovi e oute onl usin t e e ille oles To e
-
vent avit o ullin t e i ne se tions a a t t e
etu ns an t e i ne sta ili e s ave an e st a s o
se u in t ese a ts to oists o a te s See i u e 6 5
se 6 o 8 s eet etal s e o la e no lon e
t an 1/2 in 13
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.
C e il ing
F ir e s t o p
S t r a p s
O p t io na l
A d d it io na l
S u p p o r t
J o int
B a nd
( O p t io na l )
Figure 6.5
Secure the Chimney
28
Heat & Glo • NORTHSTAR • 480-2360 Installation Manual • Rev D • 05/30/13
