摘要:
A method and apparatus for post-tensioning a reinforcing strand disposed within a concrete slab of the character having a plurality of reinforcing members embedded therein. The apparatus includes a yieldably deformable elastomeric body having a longitudinally extending passageway formed therein for receiving the reinforcing strand. The apparatus also includes a removal mechanism for use in expeditiously removing the elastomeric body from the concrete slab after the slab has been poured.
摘要:
A method and apparatus for positioning mild steel reinforcing bars within a precast, moment resisting frame of a building. The apparatus includes a hand-receiving access component that can be installed within the concrete beams that make up the building frame so as to permit convenient access to the reinforcing bars that are slidably carried within bar receiving passageways formed within the concrete beams. Additionally, the apparatus includes a bladder-receiving component that can be installed within the concrete beams that make up the building frame in a manner to permit an expandable bladder to be conveniently positioned within the cable receiving passageways formed in the beam. When in position within a cable-receiving passageway, the expandable bladder spans the interface between the beam and the column and effectively prevents grout from entering the cable passageway during the grouting step. The apparatus also includes a novel joint sealing apparatus for sealing the peripheral portions of the joint formed between the columns and beams that make up the moment resisting frame.
摘要:
An apparatus for positioning high-strength cables within a precast, moment resisting frame made up of interconnected columns and beams in which the columns have an outside face provided with an opening and a cable receiving passageway in communication with the opening. The apparatus uniquely includes a cable routing subassembly for conveniently routing the cables from the interior of the moment resisting frame to the opening in the outside faces of the columns. The cable routing subassembly includes a curved tubular member that permits the cable to be inserted into an opening in the outside face of the column either from a first level within the structure that is substantially coplanar with the opening in the outside face of the column, or from a second level within the structure that is below the first level.