Seismic Roof Curb Requirements

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.

Seismic roof curb requirements.

Meets seismic code requirements. 1 3 density fiberglass as required fully welded mitered corners. Equipment mounting supports. Curb adapters retro mate.

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. Additionally seismic requirements are not fulfilled by just ordering a seismically stamped roof curb. The additional requirements are detailed on each stamped submittal drawing. Curbs solidly braced or bolted directly to the building structure without vibration isolation.

For these applications esr s andmegacurb s are required. The goal is to match or exceed the seismic roof curb design value referred to as the ss value. For installation on flat membrane built up roofs requiring seismic rating. Seismic curbs are manufactured by thycurb fabricating division of thybar corporation or approved equal.

07 72 00 thy buyline 3055. 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. Roof curbs insulated roof curbs. Icc es ac 156.

16 gauge galvanized steel. As the sizes increase beyond 12 000 lb and 40 ft of length attachment to a sheet metal roof curb becomes impractical. It is suitable for units in the 5 000 lb to 12 000 lb 40 ft long class for most seismic and wind conditions. Base shall be constructed complete with all welded corners and wood nailers.

Non insulated roof curbs. 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. 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. Catwalk service platforms.

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