STUD WITH EXTENSION NUT AND USE METHOD THEREFOR

PROBLEM TO BE SOLVED: To provide a stud with extension nut capable of improving deviation rigidity and strength of the stud for a load support member such as a bridge beam and steel girder of a high level road which support precast concrete floor board and steel beam of an architecture structure, reducing the influence of support pressure stress acting on a filler for preventing deviation, and improving the workability when the floor board is constructed. SOLUTION: This stud B has a stud basic member 1 which is directly welded on a base member M and forms a male screw 13, a stud with head 3 which is connected with the stud basic member 1 to form a male screw 32, a nut part 2A forming a female screw 23 which is screw-fitted in the male screw 13 formed in the stud basic member 1 and the male screw 32 formed in the stud with head 3 to connect the stud basic member 1 with the stud with head 3, and a collar part 2B covering outer periphery of a welded part 11 of the stud basic member 1. An end face 24 is divided by a connection member 2 brought into pressure-contact with a surface of the base member M.