FILE REINFORCEMENT APPARATUS AND FILE STRUCTURE AND METHOD OF THE FILE STRUCTURE

摘要

The present invention is a hollow reinforced body portion inside; A reinforcing wing portion formed to extend outwardly from an outer circumferential surface of the reinforcing body portion and resisting at least a lateral load; And, it is formed so as to protrude in an inner direction than the inner circumferential surface of the reinforcing body portion, and a space maintaining portion for maintaining a space between the reinforcing body portion and the file disposed inside the reinforcing body portion; provides a file reinforcement comprising a do.