MEASURING INSTRUMENT OF EXPANSION JOINT GAP FOR NARROW SPACE

摘要

It is possible for the inspector to easily measure the expansion and contraction flow formed in the narrow space between the alternation of the bridges and the girder and the bridge and to easily measure the expansion and contraction of the narrow space by moving one vertical bar between the expansion / In addition, a stretch erosion measuring device for a narrow space, which can be easily adjusted in length by using a multi-stage vertical rod, is provided.