We're planning a snack shack building (600sf) - first floorwill be the kitchen. The seating will be on an open roof deck directly above (flat roof). There will be a hood and the kitchen exhaust duct will go to a KE fan on the roof deck. Code requires 10' ht. from a walkway. Does the roof deck seating count as a walkway? Apart from smell issues, I'm just trying to clarify the code requirement for the height of this fan. Thanks in advance.