B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
72/122, 25/75
B28B 21/60 (2006.01) B28B 23/04 (2006.01) E02D 5/58 (2006.01)
Patent
CA 1050242
ABSTRACT A method for producing a concrete member comprises the steps of: in- serting the threaded portion of a tensioning steel member into a guide metal piece of a cylindrical shape and having inwardly projecting top surface, said tensioning steel member having at the other end an anchor plate secured there- on, and said guide metal piece being formed on one of the opposing panels of a mold in inwardly projecting relation; holding said anchor plate secured to said tensioning steel member tightly in contact with the top or innermost surface of said guide metal piece; placing the anchor plate in a manner to face a fixing metal piece inwardly projecting from the inner surface of a panel opposing to said one panel; fastening the anchor plate to said the other panel with a bolt to thereby set said anchor plate on the top or inner- most surface of the fixing metal piece; threading a nut member on the threa- ded portion of the tensioning steel member; placing a concrete in a mold in the condition thus defined; and removing the panels from the concrete member when hardened, together with the guide metal piece and fixing metal piece; whereby a prestress is introduced to the tensioning steel member and then a nut is tightened to fix said tensioning steel member in tensioned condition. This method enables the production of a concrete member in which ends of a tensioning member and anchor plate are completely buried in a concrete mem- ber, facilitating the joining of one concrete member to another and saving the space for molds by stacking same vertically, with other various advan- tages in producing concrete member.
225587
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