For the Salsbury 3316SAN-U, the appropriate anchoring hardware depends on whether you are mounting to new or existing concrete: New concrete: Salsbury mounting kit 3394 uses four 1/2" diameter × 8" high J-anchor bolts. Existing concrete: Salsbury kit 3393 uses four 5-1/2" expansion wedge anchor bolts. So, for a new concrete installation, the anchor bolts are 1/2" diameter × 8" long. The 3316 pedestal uses four anchors.