Designed to be installed into concrete slab at the time the concrete is poured. Concrete must be a 2500 psi minimum slab. Concrete slab must allow 4725 lb of vertical tension on anchor without lifting. This assumes that the concrete weighs 150 lb/cu-ft. Slab must be 8 in minimum thickness at location under any anchor to allow 5 in embedment of anchor J rod. Black color.