Snyder Industries’ seismic/wind cable restraint systems are available for tanks with molded-in tie-down lugs (contact Snyder for tanks without molded-in lugs). Each seismic/wind cable restraint system is based off of the size of the polyethylene storage tank, the weight of the fluid to be stored and the geographical location of the tank. Materials used are galvanized steel (GS) with options for either 304SS or 316SS.
The anchor base plates and cable clips confine the tank to the surrounding area during an earthquake to prevent overturn and lateral movement and are based off of International Building Code (IBC) and California Building Code (CBC).
Tanks using Snyder’s seismic/wind cable restraint system are required to be located on a concrete pad designed for the size of the tank and local conditions but must have thickness greater than the anchor bolt embedment depth and diameter that allows a minimum edge distance (distance from the sidewall of the tank to the edge of the concrete pad) to allow for “crack out” as required by code.
Also see Seismic System FAQ for frequently asked questions.
Snyder's Guidelines for Use and Installation (section 8.1, 8.2 and 8.3 cover Seismic Restraint System Installation)
Contact Snyder's Industrial Products Division for any questions or additional details.
Standard (non-site specific) seismic calcs are available by request. If you need site specific calcs quoted, fill out the Site Specific Calc Form and send it to the Snyder Distributor providing you with the quote for your tank(s).