Seismic Roof Curb Detail

The goal is to match or exceed the seismic roof curb design value referred to as the ss value.

Seismic roof curb detail.

Curb rather than anchored to the roof deck. The width of the supporting structural steel shall be at least as wide as the base plate of the curb. It is comprised of fully welded galvanized steel and ships ready for jobsite installation. Use tack welding or other suitable fastening.

Curbs solidly braced or bolted directly to the building structure without vibration isolation. Seismic curbs see figure 12 seismic curbs are available on a special quoted basis. Curb must be capable of supporting seismic loads of two options. If ductwork is installed on the roof it is recommended that the gauge of.

To avoid wind and windborne debris damage to rooftop ductwork it is recommended that ductwork not be installed on the roof see figure 5. We ve built more curbs than anybody relying on years of experience and libraries filled with hvac equipment data. The src is a seismic wind load rated roof curb engineered for installation in earthquake prone and or high wind areas. The curbs should be anchored to structural steel concrete as fallows.

This curb is designed to mate perfectly with the rooftop equipment and comes with a wood nailer to facilitate the attachment of. Flat or sloped. Founded in 1959 and with 5 factories across the country thybar is the oldest and largest roof curb manufacturer in the world. Bolts should be placed in every hole provided in the base plate of the curb.

Become familiar with the roof curb installation procedures. 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. The additional requirements are detailed on each stamped submittal drawing. As a general rule the curb should be placed directly on the roof support members.

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. Seismic roof curb seismic roof curb detail. The attachment of the curb itself also needs to be designed and specified. 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.

Front inlet height top bottom rear outlet length. Bolts should be with nuts and washers. Up to 0 75gs up to 2 06gs curb heights vary in increments of 4 00 from 14 00 to 34 00.