Roof Curb Details

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 seams joined by continuous water and air tight welds.

Roof curb details.

Free cad detail download of a prefabricated roof curb to be used in your architectural section cad drawings. As a general rule the curb should be placed directly on the roof support members. Roof curbs are support structures for fans and ventilators. Roof curb shall be internally reinforced with angles 48 on center and factory installed wood nailer.

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. Use tack welding or other suitable fastening method to secure the roof curb in place. All roof curbs equipment rails pipe and duct mounting pedestals and pipe penetration systems to be specified together bought by one contractor and installed by one contractor. They can be selected to fit the specific type of roof such as flat pitched or ridged.

Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. All curbs to be provided by one roof curb manufacturer. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer.