Provides a three way 90º corner joint. Used frequently for a top rail 90º turn where a post is present. Compliment this with A20 for a lower rail. Also used for corner joints on structures such as work benches, tables etc.
Provides a structural base plate for the support of a vertical post typically for a guardrail. Two socket set screws give a rigid structural fixing. Recommended that the fixing down bolts be in line with the applied load.(i.e 90º to the rails)