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Structural roof curb detail.
Stamps are available for all 50 states if needed.
Curbs should be sloped to avert water ponding.
Heights to be 8 above finished roof deck or as detailed.
Top of all roof curbs shall be level with pitch built into curb when deck slopes.
Structural curbs are individually designed to span the existing bar joist at the base transitioning to match specific unit dimensions at the top.
Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer.
In many cases florida building code fbc compliant roof curbs also feature seismic protection as well.
Section 07721 prefabricated hvac structural roof curbs part 1 general 1 01 summary a.
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.
A structural engineer predetermines the seismic requirements of a building.
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.
The general contractor shall provide all labor material and equipment to completely install the prefabricated hvac roof curbs.
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 a minimum of eight inches above the finished roof and factory insulated to reduce condensation.
Internally insulated with 1 1 2 thick 3 lbs.
This is dictated by the international building codes ibc and california building codes cbc based upon requirements set by the american society of civil engineers asce.
Curbs should be sloped to avert water ponding.
Free cad detail download of a prefabricated roof curb to be used in your architectural section cad drawings.
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.
Below are links to all our products downloadable roof details and drawings.
Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation.
Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer.
The prefabricated hvac roof curbs must be installed in accordance with instructions and as detailed on drawings.
