A server rack seismic restraint includes a rear restraint assembly configured to attach to a support surface that is operable to support a data center server rack. The rear restraint assembly includes at least one lateral member positioned to receive the server rack and restrain the server rack against lateral movement based on a force applied to the server rack; and an angled bracket positioned to receive the server rack and restrain the server rack against vertical movement based on the force applied to the server rack. The server rack seismic restraint also includes a front restraint assembly configured to attach to the support surface and engage the server rack to restrain the server rack against vertical movement based on the force applied to the server rack.