Roof Curb Weight

Specify roof curbs in section 07720.

Roof curb weight.

Looking for dayton roof curb fixed nonventilated type 12 in curb height in 17 1 2 in curb square o d. Roof top unit weight will not allow thermal movement of the standing seam roof system if the units were placed on standard curbs attached to the roof. Heights to be 8 above finished roof deck or as detailed. 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.

Roof support the roof must be capable of adequately supporting the weight of the rooftop unit as well as that of the curb. Weight of roofing materials. Refer to figure 17 and tables 1 and 2 for specific center of gravity corner weight information and accessory weights. This curb system is typically used when the roof top unit weight cannot be supported by purlins alone and loads must be transferred to the main frames with i beams.

Units may be set either lateral or. Internally insulated with 1 1 2 thick 3 lbs. The following table. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer.

Last updated july 22 2020. Top of all roof curbs shall be level with pitch built into curb when deck slopes.