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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 24 - Top Vent - THREE ELBOWS
V
H
1
H
V
1
Ceiling
Firestop/Spacer
(SV8BF)
Wall
Firestop/Spacer
(SV8HF)
Table B
H + H
1
Maximum
V Minimum
feet (meter) feet (meter)
10 (3.1) 2.5 (0.762)
15 (4.65) 3.5 (1.06)
20 (6.2) 4.5 (1.37)
H + H
1
= 20 feet (6.2 m) Max.
V + V
1
+ H + H
1
= 40 ft. (12.4 m) Max.
V + V
1
= 11 feet (3.3 meters) Min. for LSM40-2
V + V
1
= 10.5 feet (3.2 meters) Min. for LSM45-2
H
V
V1
Ceiling
Firestop/Spacer
(SV8BF)
Table A
H Maximum
V Minimum
feet (meter) feet (meter)
10 (3.1) 2.5 (0.762)
15 (4.65) 3.5 (1.07)
20 (6.2) 4.5 (1.37)
V + V
1
+ H = 40 feet (12.4 meters) Max.
V + V
1
= 11 feet (3.3 meters) Minimum for LSM40-2
V + V
1
= 10.5 feet (3.2 meters) Minimum for LSM45-2
Figure 23 - Top Vent
TWO 90 DEGREE ELBOWS
VERTICAL VENT FIGURES/TABLES (continued)