Seismic Roof Curb Requirements

Roof curbs insulated roof curbs.

Seismic roof curb requirements.

Base shall be constructed complete with all welded corners and wood nailers. 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. Curbs solidly braced or bolted directly to the building structure without vibration isolation. Curb adapters retro mate.

For installation on flat membrane built up roofs requiring seismic rating. Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb. Seismic curbs are manufactured by thycurb fabricating division of thybar corporation or approved equal. 16 gauge galvanized steel.

All welds coated after fabrication. The goal is to match or exceed the seismic roof curb design value referred to as the ss value. It is suitable for units in the 5 000 lb to 12 000 lb 40 ft long class for most seismic and wind conditions. The york curb uses only un treated wood.

1 3 density fiberglass as required fully welded mitered corners. 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 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. Equipment mounting supports.

07 72 00 thy buyline 3055. Icc es ac 156. The additional requirements are detailed on each stamped submittal drawing. Catwalk service platforms.

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. For these applications esr s andmegacurb s are required. As the sizes increase beyond 12 000 lb and 40 ft of length attachment to a sheet metal roof curb becomes impractical. 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.

Furnish and install prefabricated seismic roof curbs as required to meet seismic requirements. Meets seismic code requirements.