Abstract: A system for mounting a partition, the system including a shoe with a slot for receiving an edge of the partition and an isolator that fits within the slot between the partition and a portion of the slot. A clamp assembly fits within the slot opposite the first isolator. The clamp assembly includes a block with a projection on the side thereof facing a shoe sidewall. The shoe sidewall face adjacent to the block has a groove capable of receiving a projection therein so that when the projection is received in the groove, the block is not movable in a partition-withdrawal direction across the shoe sidewall face. The clamp assembly also includes a panel edge receiving pocket adapted to receive and hold the bottom of the panel lower edge and the sides of the panel lower edge.