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Page 23
VENTING FRAMING AND FINISHING (continued)
EXISTING CEILING JOISTS
NEW FRAMING
CEILING BELOW
B
A
Vent Size
A
B
6 5/8"
10"
10"
8"
10 1/2" 10 1/2"
Figure 33
A
B
NAILS, 4 REQUIRED
CEILING FIRESTOP
Vent Size
A
B
6 5/8"
10"
10"
8"
10 1/2"
10 1/2"
Figure 34
NAILS, 4 REQUIRED
CEILING FIRESTOP
A
B
Vent Size
A
B
6 5/8"
10"
10"
8"
10 1/2" 10 1/2"
Figure 35
See
Horizontal Termination
Page 25 and
Vertical Termination
Pages 26 and 27.