ASCEND Ring locks Ledgers are horizontal members of the ring lock scaffolding that are used to provide horizontal support for the load and steel planks. It consists of a steel pipe with a ledger head welded on both ends and two wedge pins. The wedge pin is used to fix the ledger head onto the ring plate firmly by inserting it into the ring plate through the hole on the ledger head. The ledger head is produced by cast steel wax molds.