Hvac Roof Curb Detail

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Hvac roof curb detail.

Roof curbs should be supplied by the hvac manufac turer to the general contractor or building manufacturer and installed by an experienced erector. For anyone new to the hvac industry this is a valid question. Refer to figure 17 and tables 1 and 2 for specific center of gravity corner weight information and accessory weights. 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.

Do not cut out the entire roof deck within the curb area. Roof curb and curb adapter specialists serving north america. This guide does not address roof penetrations. Roof support the roof must be capable of adequately supporting the weight of the rooftop unit as well as that of the curb.

The roof curb is designed to support the weight of the unit and to offer a means for contractors to. Roof curbs for standing seam metal roofs pick the proper material. Instructions supplied with the unit curb. Heights to be 8 above finished roof deck or as detailed.

The slightest inefficiency or mismatch in design or engineering can create blow back. A galvalume coated roof doesn t mean that a galvanized steel roof curb is the best thing to use in fact galvanized roof curbs are known to rust corrode and leak particularly along weld joints as soon as a year after installation. Hvac curbs provide structural support for rooftop ac units and other roof mounted equipment. What is a curb adapter.

Specify roof curbs in section 07720. Through a comprehensive approach combining attention to detail with a constant flow of information rcs provides the most innovative and complete roof curb systems in the industry. 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.

They also serve as a location for roof penetration to allow cooled air to flow into the building and return air to flow out. Top of all roof curbs shall be level with pitch built into curb when deck slopes. Let s start with a new installation. We ve built more curbs than anybody relying on years of experience and libraries filled with hvac equipment data.

Commercial ac manufacturers all have proprietary specs for their curbs. Units may be set either lateral or. 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.