(a)

1. (1) Mechanical equipment shall not be located on the roof unless contained in a separate mechanical roof penthouse or submitted for approval in writing to the Design Review Section prior to the first plan review.
2. (2) Refer to 22 CAR § 111-409 regarding unacceptable design configurations.

(b) In those instances where mechanical equipment is approved to be located on the rooftop due to the building budget or design, the following guidelines should be followed:

1. (1)

   1. (A) Rooftop equipment (defined here as self-contained heating and/or cooling package units and associated ductwork) which is elevated above a roof shall be designed with adequate support and clearance.
   2. (B) The larger a piece of equipment is, the more clearance it will require.
   3. (C) Provide a minimum of ten inches (10") of clearance above the finished roof surface and additional clearance as required sufficient to maintain and reroof the building.
   4. (D) Contact or refer to the National Roofing Contractors Association for recommended minimum heights of equipment and support systems above the roof;
2. (2) Rooftop equipment shall be adequately supported and attached to the structural system of the building;
3. (3) Provide vibration isolation, as required;

4. (4)

   1. (A) Legs of equipment (of substantial size and weight) supports should be surrounded by a pitch pan filled with one inch (1") of fast setting gypsum cement and topped off with a commercial pitch pan sealer sloped to shed water.
   2. (B) Lightweight equipment should be set on water-resistant treated wood blocking and secured to the roof structure with metal straps, as needed, for protection and safety;
5. (5) Protect pitch pans and pan sealants by installing watertight aluminum or prefinished sheet metal umbrellas with drawbands attached to equipment support legs; and

6. (6)

   1. (A) Provide support for any piping or lightweight equipment on the roofs.
   2. (B) Piping or equipment shall be supported by treated wood blocking set on an extra layer of loose membrane set in industrial roof cement on the roof surface.
   3. (C) Electrical conduit shall not be surface run on the roof.