36
Vertical Installation Roof Termination
Clearance plates are used to maintain 2” clearance to combustibles for 2R HT Chimney Systems. They
may be used with grease ducts (2R, 3R, 3Z) to help center grease duct when going through a floor/ceiling.
A high temperature gasket is used to seal the transition plate to the exhaust fan/vent cap. The transition
plate is secured to the curb using 1/4”-20 x 1-1/2” zinc plated self-drilling screws. The fan is secured to the
vented curb using 1/4”-20 x 2” zinc plated self-drilling screws.
Figure 24 - Roof Termination Installation Details
1. Exhaust Fan
2. High Temperature Gasket
3. Transition Plate - Welded to inner duct/chimney
4. Vented Curb
5. Clearance Plate Mounting Screws - Secures
clearance plates to combustible surface.
6. Double Wall Duct/Chimney
7. Vertical Wall Support Assembly
8. Double V-band
9. 2” Clearance Plates
10. Substrate - Wood, Concrete or Steel
11. Inner Duct/Chimney
12. Substrate Hardware, refer to Table 7.
13. 1/4”-20 x 1-1/2” Zinc Plated Self Drilling Screws
14. 1/4”-20 x 2” Zinc Plated Self Drilling Screws
A. Refer to Table 8 for grease duct or Table 9 for
chimney.
B. Edge Distance, refer to Table 7.
10
B
1
11
10
9
12
13
14
2
1
2
3
4
5
6
7
8
9
10
A
11
12
3
4
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