21
Transition Plate
The transition plate is designed to connect to a roof curb. The duct section is welded to the underside of
the plate. The plate is formed to provide a slope to allow grease deposits to flow back towards the duct.
When connected, the plate mounts on top of the fan curb that supports the fan housing. The plate may be
positioned off-center within the curb provided that the minimum distance to combustibles is maintained. In
the event that the plate is positioned off-center, trim off excess plate material to allow for fan placement.
Secure the plate to the curb using a minimum of three fasteners per side. A suitably sized fastener
provided by others is used. The plate can be used to maintain distance to combustibles and also for
vertical support.
See “Double Wall Adjustable Duct, Chimney and Transition Plate” on page 12 for adjustable duct
section assembly. The top collar is installed upside down to seal the insulation at the fan termination /
transition plate. A maximum of 24’ can be supported by the curb and transition plate combination. Refer to
Table 6 on page 25 for vertical support spacing.
Figure 13 - Transition Plate
1. Exhaust Fan
2. Ceramic Gasket
3. Vertical Support
4. Adjustable Duct Section
5. Vented Curb
6. Transition Plate
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