Seismic Roof Curb Detail

Bolts should be with nuts and washers.

Seismic roof curb detail.

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. The maximum spacing between cross braces is 90. Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb.

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. Roof curb must be square level prior to setting equipment. 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.

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. Curbs solidly braced or bolted directly to the building structure without vibration isolation. A minimum of one cross brace will be provided with each curb.

See fi gure 6. 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. 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. Bolts should be placed in every hole provided in the base plate of the curb. Vibration isolation roof curb and rail.