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Smoke Duct, Intumescent Coating and Shaft Enclosure

Smoke Duct, Intumescent Coating and Shaft Enclosure

Smoke Duct, Intumescent Coating and Shaft Enclosure

(OP)
Greetings

I encountered a design that has a the shaft exhaust duct riser sharing the same fire-rated enclosure with other ducts. I know this is not allowed by code. There is no space to provide a partition. The duct will be coated with an inumescent coat. I am not sure if this will provide enough insulation and how far I have to keep all the other ducts (polyisocyanurate foam panel) away. Any suggesstions?

Much obliged for all information.

RE: Smoke Duct, Intumescent Coating and Shaft Enclosure

(OP)
CORRECTION [line 1]: smoke shaft exhaust duct riser

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