Seismic Roof Curb Requirements

Base shall be constructed complete with all welded corners and wood nailers.

Seismic roof curb requirements.

07 72 00 thy buyline 3055. 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. 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.

Icc es ac 156. Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb. Roof curbs insulated roof curbs. It is suitable for units in the 5 000 lb to 12 000 lb 40 ft long class for most seismic and wind conditions.

Seismic curbs are manufactured by thycurb fabricating division of thybar corporation or approved equal. 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 york curb uses only un treated wood. Meets seismic code requirements.

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. 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. Catwalk service platforms. Curb adapters retro mate.

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. 1 3 density fiberglass as required fully welded mitered corners. For installation on flat membrane built up roofs requiring seismic rating. 16 gauge galvanized steel.

The additional requirements are detailed on each stamped submittal drawing. All welds coated after fabrication. As the sizes increase beyond 12 000 lb and 40 ft of length attachment to a sheet metal roof curb becomes impractical. The goal is to match or exceed the seismic roof curb design value referred to as the ss value.

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. Equipment mounting supports.