Rtu Roof Curb Detail

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.

Rtu roof curb detail.

Top of all roof curbs shall be level with pitch built into curb when deck slopes. Installer s guide roof curb packaged rooftop units. Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. Curb installation should be a part of the roof deck not on top of insulation or roofing materials.

See figure 6 6. The roof curb is designed to support the weight of the unit and to offer a means for contractors to connect the supply return air duct work. In no case should the curb be less than 14 inches in height. When a building is constructed prior to the installation of the hvac rooftop unit rtu the roof is cut and a metal structure called a roof curb is installed.

Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer. 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. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer.

Renaud de saint ceran subject. Use tack welding or other suitable fastening method to secure the roof curb in place. Flange screwed to 15 32 osb roof deck 8 2 7 24 x 24 curb with exhaust fan fan screwed to curb 2 5 8 36 x 36 curb with exhaust fan fan screwed to curb 3 3 9 5 9 x 3 8 curb with 2 8 high hvac unit hvac unit screwed to curb 4 5 10 5 9 x 3 8 curb with 2 8 high relief air hood hood screwed to curb 35 6. Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation.

Find out why architects building manufacturers general contractors and erectors prefer rcs for our proven solutions. Heights to be 8 above finished roof deck or as detailed. Internally insulated with 1 1 2 thick 3 lbs. The curb should provide a minimum clearance of 10 inches between the top of the finished roof surface and the top of the wood nailer continuous around the curb perimeter.

Curb installation should be a part of the roof deck not on top of insulation or roofing materials. 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.