Seismic Roof Curb Detail

Founded in 1959 and with 5 factories across the country thybar is the oldest and largest roof curb manufacturer in the world.

Seismic roof curb detail.

As a general rule the curb should be placed directly on the roof support members. The curbs should be anchored to structural steel concrete as fallows. Curb must be capable of supporting seismic loads of two options. Seismic roof curb seismic roof curb detail.

Bolts should be with nuts and washers. 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. This curb is designed to mate perfectly with the rooftop equipment and comes with a wood nailer to facilitate the attachment of. The goal is to match or exceed the seismic roof curb design value referred to as the ss value.

Any roof curb rigid or vibration that have been engineered and stamped to meet current ibc 2015 you may also hear this as complying or calculated. Curbs solidly braced or bolted directly to the building structure without vibration isolation. Up to 0 75gs up to 2 06gs curb heights vary in increments of 4 00 from 14 00 to 34 00. The src is a seismic wind load rated roof curb engineered for installation in earthquake prone and or high wind areas.

Flat or sloped. The attachment of the curb itself also needs to be designed and specified. Use tack welding or other suitable fastening. Front inlet height top bottom rear outlet length.

Seismic curbs see figure 12 seismic curbs are available on a special quoted basis. 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. We ve built more curbs than anybody relying on years of experience and libraries filled with hvac equipment data. If ductwork is installed on the roof it is recommended that the gauge of.

Become familiar with the roof curb installation procedures. Bolts should be placed in every hole provided in the base plate of the curb. The additional requirements are detailed on each stamped submittal drawing. It is comprised of fully welded galvanized steel and ships ready for jobsite installation.

Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb. Curb rather than anchored to the roof deck. To avoid wind and windborne debris damage to rooftop ductwork it is recommended that ductwork not be installed on the roof see figure 5.