When a building is constructed prior to the installation of the hvac rooftop unit rtu the roof is cut and a metal structure called a roof curb is installed.
Roof curb for ac unit.
The curb was supplied by the the heating and cooling company located in norwalk ct.
We serve pittsburgh monroeville stamford greenwich and white plains ct.
To compliment our curb line canfab has a complete library of seismic calculations and seismic clips addressing the current code for unit to curb isolator to curb vibration isolation curbs and curb to structure method of attachment including wood.
Roof curbs should be supplied by the hvac manufac turer to the general contractor or building manufacturer and installed by an experienced erector.
Mechanical contractors should not be asked to supply or install roof curbs for roo fi ng systems.
The bow tie royale 6 cinema contracted commercial usa to install an air conditioning unit on the flat roof of 542 westport ave norwalk ct.
Commercial ac manufacturers all have proprietary specs for their curbs.
Hvac curbs provide structural support for rooftop ac units and other roof mounted equipment.
Canfab roof curbs are built of heavy gauge galvanized steel to ensure equipment support without curb deflection.
To ensure a perfect fit canfab roof curbs are built to the same specifications as the units they are designed for.
Nail felt into place.
They also serve as a location for roof penetration to allow cooled air to flow into the building and return air to flow out.
Install 2 inch thick boards or rigid insulation around the curb.
The roof curb is designed to support the weight of the unit and to offer a means for contractors to connect the supply return air duct work.
Secure the curb to the roof support members.
Does not address roof penetrations.
Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer.
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.
Heights to be 8 above finished roof deck or as detailed.
Remove any twist within the cu rb due to roof supports and square the curb.
Specify prefabricated roof curbs and related products by a roof curb manufacturer not with or by the equipment manufacturer.
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.
A good penetration requires more than supplying just any roof curb.
Bring field supplied roofing felt up to the top of the curb nailing strips.
Flat roof curb installation for an air conditioner in connecticut.
Curbco builds hvac curbs to suit anymake and model of commercial ac.
Install cant strips around the curb.
