37
Vertical Support Floor and Curb
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 25 - Floor and Curb Support Installation Details
1. Exhaust Fan
2. Vented Curb - Roof Termination
3. Substrate - Wood, Concrete or Steel
4. Riser Cover
5. Through Curb Support with TPDB
6. Clearance Plates
7. Floor Support Assembly
8. Single V-band - Inner
9. Riser
10. 1/4”-20 x 2” Zinc Plated Self Drilling Screws
11. Through Curb Support with TPDB
12. Double V-band
13. Double Wall Duct/Chimney
14. 1/4”-20 x 1-1/2” Zinc Plated Self Drilling Screws
15. Transition Plate - Welded to inner duct/chimney
16. Clearance Plate Mounting Screws - Secures
clearance plates to combustible surface.
17. High Temperature Gasket
18. Substrate Hardware, refer to Table 7.
A. Edge Distance, refer to Table 7.
B. Vertical Support Spacing, refer to Table 6.
1
2
A
3
4
5
6
7
B
9
8
10
11
12
13
1
14
15
3
16
17
13
16
18
7
B
A
3
11
18
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