Abstract: A power sanding machine (10) has three circumferentially spaced cogged belts (40) to drive three discs (52) rotatably mounted to an inner bowl (30) which is rotatably mounted to a housing (12), which in turn is connected to an operating handle (14). Mechanical lock can rotationally affix the inner bowl (30) to the housing to circumferentially position a pulley at the left or right edge (326, 322) of the sanding machine or at the front end (330) of the sanding machine. Power cleaning and sanding machines (412, 500, 600) incorporate the three disc (52) arrangement or a direct-drive one disc arrangement (572, 672). The machines (412, 500, 600) include multiple floor finishing units (420, 514, 614) ganged together in unique arrangements.

Abstract: A support post for use in construction mounted to the floor with a base collar which is provided with spacer rings for height adjustment. The spacer rings are inserted into the base collar before the support post is in order to provide additional height for the support post as needed in the field.

Abstract: An improved ledger beam is provided which securely forms a load transferring connection with joist members without the need for separate material connectors which must be welded or fastened to the ledger beam. The ledger beam has a series of shear tabs integrally formed from the ledger beam's parent material which serve as points of fastening between the ledger beam and the joists. Also provided is a method of transferring loads from joist members to ledger members in a structural floor arrangement without the need for separate material connectors which must be welded or fastened to the ledger beam.