Seismic Roof Curb Requirements

Curbs solidly braced or bolted directly to the building structure without vibration isolation.

Seismic roof curb requirements. Curb adapters retro mate. The additional requirements are detailed on each stamped submittal drawing. 1 3 density fiberglass as required fully welded mitered corners. All welds coated after fabrication.

For these applications esr s andmegacurb s are required. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. Icc es ac 156. The york curb uses only un treated wood.

Furnish and install prefabricated seismic roof curbs as required to meet seismic requirements. It is suitable for units in the 5 000 lb to 12 000 lb 40 ft long class for most seismic and wind conditions. 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. As the sizes increase beyond 12 000 lb and 40 ft of length attachment to a sheet metal roof curb becomes impractical.

Seismic curbs are manufactured by thycurb fabricating division of thybar corporation or approved equal. 16 gauge galvanized steel. Catwalk service platforms. Roof curbs insulated roof curbs.

Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb. 07 72 00 thy buyline 3055. Equipment mounting supports. For installation on flat membrane built up roofs requiring seismic rating.

Flange screwed to 15 32 osb roof deck 8 2 7 24 x 24 curb with exhaust fan fan screwed to curb 2 5 8 36 x 36 curb with exhaust fan fan screwed to curb 3 3 9 5 9 x 3 8 curb with 2 8 high hvac unit hvac unit screwed to curb 4 5 10 5 9 x 3 8 curb with 2 8 high relief air hood hood screwed to curb 35 6. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. Meets seismic code requirements. 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 curb should provide a minimum clearance of 10 inches between the top of the fi nished roof surface and the top of the wood nailer continuous around the curb. Non insulated roof curbs.