Seismic Roof Curb Detail

The conclusive value will be between 0 and 3 73 highest value in california.

Seismic roof curb detail.

Curbs solidly braced or bolted directly to the building structure without vibration isolation. 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. Kinetics esr features high frequency noise isolation pads code compliant seismic and wind restraint and access ports for each isolator to inspect level or change springs after equipment placement. Bolts should be with nuts and washers.

The width of the supporting structural steel shall be at least as wide as the base plate of the curb. The goal is to match or exceed the seismic roof curb design value referred to as the ss value. Heavy duty complete vibration isolation roof curb and rail for over 20 ton packaged rooftop units. A minimum of one cross brace will be provided with each curb.

The additional requirements are detailed on each stamped submittal drawing. 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. The maximum spacing between cross braces is 90. 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.

Roof curb must be square level prior to setting equipment. The curbs should be anchored to structural steel concrete as fallows. Seismic roof curb seismic roof curb detail. Insignia is shown on curb and unit detail drawings.

A sheet metal curb with nailer pre manufactured curb go to page 50 directly connected to a wood roof curb wood curb go to page 56 any rooftop unit connected to a manufactured vibration isolation curb on a post and beam isolation curb on a post and beam go to page 57 roof mounted on a post and beam post and beam go to page 47 large rooftop unit. See fi gure 6. Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb.