Mechanical Roof Curb Detail

This guide does not address roof penetrations.

Mechanical roof curb detail.

If the roof curb will be mounted on a new building it can be assembled at any convenient location and installed as soon as the roof support members are in place. Top of all roof curbs shall be level with pitch built into curb when deck slopes. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer. Mechanical contractors should not be asked to supply or install roof curbs for roo fi ng systems.

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 prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer.

Become familiar with the roof curb installation procedures. As a general rule the curb should be placed directly on the roof support members. 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. Use tack welding or other suitable fastening.

Specify roof curbs in section 07720. Roof curb and curb adapter specialists serving north america.