STEP BOLT FOR ASCENDING TO AND DESCENDING FROM STEEL TOWER AND THE LIKE

摘要

PROBLEM TO BE SOLVED: To rapidly attach a tower base of a steel tower into a through-hole by employing a structure in which a nut can be easily sandwiched by a step bolt, and to easily detach it in an ascending and descending manner to and from the steel tower.

SOLUTION: A step 3 for placing a worker's foot is formed on the one side of a rod-like step bolt body 2, an insertion portion 4 on which a screw thread 4a is formed as in the case of a bolt for being inserted into the through-hole H is formed on the other side of the step bolt body 2, a positioning nut 5 is fastened to the insertion portion 4, and a come-off prevention member 7 for detachably engaged with a pair of split nuts 6 split in a half-arc shape is sandwiched in the insertion portion 4.

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