Abstract: There are disclosed a method and an apparatus for producing an elongated concrete member of a trapezoid cross section for use as a cross tie, i.e., a prestressed concrete member for fixing rails of railroads.

Abstract: A device for producing a prestressed concrete member adapted to facilitate the joining of one concrete member to another including a mold having a plurality of panels oppositely disposed, one of the panels being provided with a plurality of fixing metal pieces each having a concaved portion in the top surface thereof, another panel of said panels being provided with cup-shaped guide metal pieces at the corresponding positions to said fixing metal pieces, an anchor plate fixedly disposed transversely and adjacently to the top portions of said fixing metal pieces, tensioning steel members coated with an sliding material each having one end connected with said anchor plate and the other end pierced through the top portion of said guide metal piece into the inside of said guide metal piece, one end of tension steel members each having a head portion for engaging with said anchor plate or the projecting portion formed therein in the shape of a crater so as to be fitted in said concaved portion of said fixing metal