Roof Equipment Curb Details

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.

Roof equipment curb details. Base flange attachments for securing to the building structure. 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. Factory installed wood nailer. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer.

Units may be set either lateral or parallel to the roof support members. Prime g 90 galvanized steel. The slightest inefficiency or mismatch in design or engineering can create blow back resistance that can wear down your climate control fan parts and cause your equipment to waste costly energy. 1 1 2 inch thick 3 pound density rigid insulation.

Allowing the highs to fit under the roof panel on the upslope and over the roof panel on the downslope to create a continuous water flow is critical to the function of the roof curb. The roof must be capable of adequately supporting the weight of the rooftop unit as well as that of the curb. Refer to figure 17 and tables 1 and 2 for specific center of gravity corner weight information and accessory weights. Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer.

Prefabricated roof curbs are available as insulated typetc 1 tc 2 and tc 3. The combined weight of the unit accessories and curb.