Roof Curb Installation Detail

The maximum spacing between cross braces is 90.

Roof curb installation detail.

Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday. Roof curb must be square level prior to setting equipment. Find out why architects building manufacturers general contractors and erectors prefer rcs for our proven solutions.

Include a footnote in the mechanical and skylight sections that reads all roof curbs are specified in 07720 curb installation should be a part of the roof deck not on top of insulation or roofing materials. Specifications prefabricated roof curb to be manufactured of prime galvanized steel construction 20 18 16 or 14 gauge as required meeting astm a653 653m with welded corners and with. The primary function of the curb is to keep weather out while supporting flashing the equipment on it. Use tack welding or other suitable fastening method to secure the roof curb.

See fi gure 6. Pre fabricated fully assembled roof curbs will reduce installation time and costs by ensuring compatibility between the rooftop unit curb and roof openings. Insignia is shown on curb and unit detail drawings. As a general rule the curb should be placed directly on the roof support members.

If the roof curb will be mounted on a new building it can be assembled at any convenient location and installed as soon as the roof support members are in place. A minimum of one cross brace will be provided with each curb.