Mechanical Unit Roof Curb Detail

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 seams joined by continuous water and air tight welds.

Mechanical unit roof curb detail.

Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer. Internally insulated with 1 1 2 thick 3 lbs. Heights to be 8 above finished roof deck or as detailed. Rooftop attachment of lightning protection systems in high wind regions.

Length unit length minus 0 875 outside curb width unit width minus 0 875. Mechanical applications involve exhaust fans rooftop hvac units electrical generators exhaust ducts vent pipes refrigeration lines etc. Top of all roof curbs shall be level with pitch built into curb when deck slopes. Architectural applications include unit skylights structural and monument skylights terminations at walls expansion joints roof hatches heat and smoke vents and satellite dish systems.

Hvac curb systems although rcs does not provide hvac rooftop units we are experts in the field and proudly provide the most critical component the roof curb system that is designed to properly support the weight of the unit and keep the water on the outside of the building where it belongs. The curb can also be mounted on a roof deck. This gooseneck was attached with only two small screws. This 30 x 10 x 8 18 000 pound hvac unit was attached to its curb with 16 straps one screw per strap.

Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer. Specify prefab roof curbs for use with all roof penetrations and roof mounted equipment including and not limited to hvac units duct openings pipe penetrations power roof exhauster intake and relief vents flues or job fabricated items. Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer.

A substantial amount of water was able to enter the building during the hurricane. Curb installation should be a part of the roof deck not on top of insulation or roofing materials. Use tack welding or other suitable fastening method to secure the roof curb in place. Roof curb and curb adapter specialists serving north america.