Mechanical Roof Curb Detail

Use tack welding or other suitable fastening.

Mechanical roof curb detail.

Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer. Instructions supplied with the unit curb. Roof curb and curb adapter specialists serving north america.

This guide does not address roof penetrations. Mechanical contractors should not be asked to supply or install roof curbs for roo fi ng systems. Roof curbs should be supplied by the hvac manufac turer to the general contractor or building manufacturer and installed by an experienced erector. Become familiar with the roof curb installation procedures.

As a general rule the curb should be placed directly on the roof support members. 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. Internally insulated with 1 1 2 thick 3 lbs. 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.

Specify roof curbs in section 07720. When you install adapter curbs welded rtu rooftop unit curbs or equipment supports for your rooftop hvac package unit going with the wrong curb adapter company can cost you big money and time.