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Access requirements for roof mounted kitchen exhaust fan

Question asked by jbraun on Jun 22, 2019
Latest reply on Jun 24, 2019 by jbraun

NFPA 96-2011 A.7.8.2.2 (1) states " ... All roof exhaust fans (whether through the roof or to the roof from outside) should have ready access to all sides from a flat roof surface without a ladder, or they should be provided with safe access via built-in stairs, a walkway, or a portable ladder to a flat work surface on all sides of the fan."

 

I am looking for guidance on the following:

 

1. How far on each side of the fan must the flat roof surface/flat work surface extend? 

2. Does flat imply horizontal, or does it imply the opposite of bumpy/uneven

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