The earthquake loads due to movement of the table and payload are transferred into the concrete floor by eight (8) anchor bolts per Earthquake Restraint. The anchor bolts (Hilti HIT RE500 SD per ICC ESR2322, 3/8 in. diameter bolts and HIS-N inserts embedded 4-3/8”) are designed for use in concrete floors at least 6 inches (150 mm) thick constructed of 2,500 psi (17.3 megapascal) minimum normal-weight concrete in an uncracked condition. If any of these conditions are not met, additional analysis and detailing by a structural engineer will be required. The earthquake loads are distributed into the optical table bottom skin by eight (8) M6-1.0 socket head cap screws pre restraint.

The ERSW2010 earthquake restraints are intended to work in conjunction with Newport OTS/INT table systems and VIS workstations. Each ERSW2010 is rated for seismic forces generated by a maximum of 2000 pounds (908 Kg) of the combined table and payload weight per restraint. The ERSW2010 is designed to withstand the earthquake loads corresponding to, or lower than, the 2018 IBC seismic accelerations Ss=2.50, S1=1.00 (for example, Hayward, CA). The design of the Restraint is in compliance with 2018 International Building Code (IBC) and 2019 California Building Code (CBC).