The process by which Thybar roof curbs and seismic/wind load restraints are designed can be summarized in three steps.

1. Determine the governing building code for the particular project.
2. Calculate the seismic/wind load design force that the rooftop equipment and roof curb is required to withstand.
3. Determine the requirement for attachment of rooftop equipment to roof curb and roof curb to building structure.

CLICK HERE for a questionnaire that can be used to gather the information necessary for Thybar's licensed Professional Engineer (P.E.) to certify that the roof curbs and restraints meet the requirements of the applicable building code.

Thybar pre-fabricated Seismic equipment bases are available in 2 styles,
A. TC-3(shown in Photo)
B. TC-5

Thybar Pre-fabricated seismic bases are constructed to meet the required local seismic codes.

The standard construction includes: galvanized steel (gauge as required to meet local codes), 14" high, 2x2 or 2x4 woodnailer, angle reinforcement, supply and return duct channels and required insulated pans.

All bases are designed to mate perfectly with the rooftop manufacturers equipment.
Seismic calculations are available upon request.