Structural Roof Curb Detail

Section 07721 prefabricated hvac structural roof curbs part 1 general 1 01 summary a.

Structural roof curb detail.

Roof curbs also protect the occupants inside the building by preventing the rooftop packaged unit from blowing off the curb during a wind event and potentially falling through the roof structure. Curbs should be sloped to avert water ponding. We try to help our clients in anyway possible. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer.

Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. Heavy gauge galvanized steel actual thickness determined by unit weight and full height internal dividers add the strength necessary to support the unit without additional framing. Typical roof curbs the curb should be structurally capable of supporting intended loads and designed such that drains power lines etc do not penetrate roof fl ashing. In many cases florida building code fbc compliant roof curbs also feature seismic protection as well.

If you have any questions about a product please don t hesitate to call us we will help you get your roofing job done right the first time. Seismic calculated curbs are available as reinforced metal curbs or vibration isolation curbs. Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. The general contractor shall provide all labor material and equipment to completely install the prefabricated hvac roof curbs.

Below are links to all our products downloadable roof details and drawings. The curb should be furnished with a wood nailer which provides a minimum of 3 5 of nailer surface mounted at the top of the curb to permit mechanical attachment of. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. Curbs should be sloped to avert water ponding.

The prefabricated hvac roof curbs must be installed in accordance with instructions and as detailed on drawings. Stamps are available for all 50 states if needed. Heights to be 8 above finished roof deck or as detailed. Structural curbs are individually designed to span the existing bar joist at the base transitioning to match specific unit dimensions at the top.

Free cad detail download of a prefabricated roof curb to be used in your architectural section cad drawings. Internally insulated with 1 1 2 thick 3 lbs. A structural engineer predetermines the seismic requirements of a building.