Abstract: A device for leveling or aligning adjacent prestressed hollowcore concrete planks includes an insert member that is received between the planks at a grout joint. One end of the insert member supports a first alignment member that is received against one side of the planks. The other end of the insert member cooperates with a second alignment member that is received against an opposite side of the planks. An adjustment member adjusts the spacing between the first and second alignment members to provide a desired alignment between the planks.

Abstract: A safety anchor system provides protection to workers that are working on an elevated platform. The safety harness system preferably includes two anchoring devices that are spaced apart on a concrete slab. An extension member extends between the anchor devices. Each individual has a tether that extends between a safety harness worn by the individual and the extension member. The tether is moveable along the entire length of the extension member, which results in a greatly increased range of available motion to the worker. The anchor devices preferably have latching members with extensions of varying dimensions to accommodate a variety of concrete slab configurations.