Mechanical Unit Roof Curb Detail

Roof curb must be square level prior to setting equipment.

Mechanical unit roof curb detail.

A roof membrane but should in some manner be lifted from the ground onto the curb or support framework. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. Unit curb orientation is critical. The primary function of the curb is to keep weather out while supporting flashing the equipment on it.

Units may be set either lateral or. Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer. 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. A minimum of one cross brace will be provided with each curb.

See figure 6 3. Heights to be 8 above finished roof deck or as detailed. Condensate drain piping diagram draw thru unit detail. Refer to figure 17 and tables 1 and 2 for specific center of gravity corner weight information and accessory weights.

And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer. Do not cut out the entire roof deck within the curb area. Electric conductivity water panel controller.

Electric water heater non circulating piping. Roof support the roof must be capable of adequately supporting the weight of the rooftop unit as well as that of the curb. Specifications 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. The slightest inefficiency or mismatch in design or engineering can create blow back.

Duct thru roof detail. Lmcurbs has the capabilities to design roof curbs for the most challenging standing seam roof applications and can correctly match your roof system. Roof curb and curb adapter specialists serving north america. The air flow insignia is shown on curb and unit detail drawings.

See fi gure 6. Duct support on roof. Constant volume mixed air unit point identification. Top of all roof curbs shall be level with pitch built into curb when deck slopes.

When setting the unit onto the curb the installer should ensure that a sealing material is positioned between the unit and curb to provide a continuous watertight connection. 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. Dual steam control valve assembly.