Thank you for the response,
The building I am working on falls under 1996 NFPA # 13 since phase one and phase 2 were permitted in 1996, OSHPD has kept both building under that code evan though only phase 1 was built then and phase 2 is being built now
My question is, do you know what code...
The unit sits on the roof and is a prefabricated metal unit with a door, the unit is 20' x 10" and there are 4 of them on the roof, the unit has a wall made of filters that brings in the air and sends it the HVAC system