UNIT SUPPORTING LEG AND METHOD FOR LAYING DOUBLE FLOOR USING THE SAME

PROBLEM TO BE SOLVED: To provide a unit supporting leg, simultaneously enabling the fixation of a supporting bolt to a level adjusting nut, the fixation of the supporting bolt to a floor contacting base, and the fixation of the above base to a foundation floor surface by one-time adhesive injecting work, and an execution method for a double floor using the above leg. SOLUTION: The floor contacting base 10 for rotatably installing a hollow supporting bolt 20 in a standing manner is formed with a hole part 11 for housing the lower end protruding part 21 of the supporting bolt 20 in a substantial penetration state. The hole part 11 is formed with a stepped conformation part 13 for receiving the lower end of the supporting bolt 20, the inner periphery surface of the hole part 11 is formed with at least one groove part 15 from the conformation part 13 to a side part, and the under surface of the base 10 is preferably formed with at least one groove part 16 toward the lower end of the outer periphery surface of the base 10. In the execution of work for the double floor, the unit supporting legs 1 are disposed at a prescribed pitch on the foundation floor, a plurality of floor panels are disposed through prescribed gaps so as to have their edges supported by the legs 1, and an adhesive is injected through the gap between the respective floor panels.