Seismic Roof Curb

These curbs come fully assembled with return and supply duct supports unit wind restraints and fiberglass as required and gasket material included for airtight rtu installation.

Seismic roof curb.

Seismic roof curb detail. Steel shall be at least. Heavy duty complete vibration isolation roof curb and rail for over 20 ton packaged rooftop units. The goal is to match or exceed the seismic roof curb design value referred to as the ss value.

Seismic roof curbs isolation roof curbs also protect the occupants inside the building by preventing the rooftop packaged unit from jumping off the curb during a seismic event and potentially falling through the roof structure. Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb. Bolts should be with nuts and washers. The conclusive value will be between 0 and 3 73 highest value in california.

Ss is the mapped maximum credible earthquake five percent dampened spectral response acceleration parameter at short periods as defined in asce 7 10 section 11 4 1. For buildings seismic requirements our seismic factory roof curbs are new construction curbs for hvac units on flat membrane or built up roofs requiring seismic rating. Additional roof curb anchoring and methods of securing equipment to the curb are also a requirement and must be adhered to for the certification to be valid. As wide as the base plate of the curb.

Vibration isolation roof curb and rail. The additional requirements are detailed on each stamped submittal drawing.