A method for constructing a reinforcing bar structure by a length-determined standardized reinforcing bar integrated with a butt joint device, the method comprising:
- a) determining a reference length of the reinforcing bar to be butt-jointed;
- b) selecting a length-determined standardized reinforcing bar used as a reference reinforcing bar based on the reference length;
- and
- c) performing a construction by repeatedly using one or more length-determined standardized reinforcing bars used as the selected reference reinforcing bar,
- wherein the step c) comprises:
- (i) installing a first length-determined standardized reinforcing bar for a first floor, wherein a first butt joint device of the first length-determined standardized reinforcing bar is positioned at least 150 mm from a bottom surface of the first floor;
- (ii) butt jointing a second length-determined standardized reinforcing bar to the first length-determined standardized reinforcing bar, wherein the second length-determined standardized reinforcing bar is for a second floor, and a second butt joint device of the second length-determined standardized reinforcing bar is positioned from at least 150 mm from a bottom surface of the second floor;
- and
- (iii) repeating the steps (i) to (ii) to reach a n-th floor, and
- the butt joint device is any one selected from the selection group of:
- a case where a male screw part is formed only in one end portion;
- a case where a female screw part is formed only in one end portion;
- a case where the male screw part is formed in both end portions;
- a case where the female screw part is formed in both end portions;
- and
- a case where the male screw part is formed in one end portion and the female screw part is formed in the other end portion,
- wherein the male screw part and the female screw part are a cylindrical screw coupling structure, a conical screw coupling structure, or a cylindrical-conical integrated screw coupling structure,
- wherein the reference length in the step a) comprises a reserved section of joint work ranging an area where the butt joint device is positioned on the length-determined standardized reinforcing bar, and
- in the step (iii), when an n-th butt joint device deviates from the range of the reserved section of joint work, the n-th butt joint device is returned into the range of the reserved section of joint work by butt-jointing a joint position adjustment reinforcing bar to a n−1th butt joint device before the n-th butt joint device,
- wherein the joint position adjustment reinforcing bar has a different length from the length-determined standardized reinforcing bar used as the reference reinforcing bar.