Seismic Roof Curb Detail

The maximum spacing between cross braces is 90.

Seismic roof curb detail.

Roof curb must be square level prior to setting equipment. Bolts should be placed in every hole provided in the base plate of the curb. Bolts should be with nuts and washers. 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.

As a point for reference the york solution unit has a front rear left right and top and bottom sides. 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. 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. Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb.

A minimum of one cross brace will be provided with each curb. The curbs should be anchored to structural steel concrete as fallows. Heavy duty complete vibration isolation roof curb and rail for over 20 ton packaged rooftop units. Insignia is shown on curb and unit detail drawings.

Seismic roof curb seismic roof curb detail. The width of the supporting structural steel shall be at least as wide as the base plate of the curb. 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. See fi gure 6.

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