Bent-bar anchors, which include the customary J and L bolts, are threaded steel rods with hooks on the end embedded into the masonry. … Headed anchors include conventional square head or hexhead threaded bolts, but also include plate anchors(where a steel plate is welded to the end of the bolt).

J-bolts are J-shaped fasteners, threaded on the flat side. They are often used in structural applications like securing walls to concrete foundations. The bent end hooks around rebar for support, and may be cast in concrete for use as an anchor bolt.

Every bottom plate needs a minimum of 2 bolts. There must be an anchor boltwithin 12 inches of each end. And the maximum spacing between any bolts on a single bottom plate is 6 feet.