Existing 3 story 12 inch thick brick bearing wall, wood framed- mixed use - 2 floor residential over commercial space under going change of occupancy Mercantile to Business.
Under IEBC, change to lower hazard, the existing rating of exterior walls is ok.
Low roof rating?
The first floor goes from side to side property lines. 2nd and 3rd have inset 5x10 courts to give light to windows.
Would like to run grease and make up air duct work from 1st floor thru the roof/floor of one of those courts up side of building to new equipment on roof.
Existing parapet is 12 inches high.
How to figure out the fire rating of that roof?
Thanks
Under IEBC, change to lower hazard, the existing rating of exterior walls is ok.
Low roof rating?
The first floor goes from side to side property lines. 2nd and 3rd have inset 5x10 courts to give light to windows.
Would like to run grease and make up air duct work from 1st floor thru the roof/floor of one of those courts up side of building to new equipment on roof.
Existing parapet is 12 inches high.
How to figure out the fire rating of that roof?
Thanks