ROAD AUXILIARY FACILITY, ITS CONSTRUCTION METHOD, NUT AND MANAGEMENT DEVICE FOR ROAD AUXILIARY FACILITY

摘要

PROBLEM TO BE SOLVED: To enable a nut fastening confirmation to be carried out with high accuracy, enable a miss of human error of a worker to be positively prevented and further enable a nut fastening confirmation to be carried out under labor saving within a short period of time.SOLUTION: This invention relates to a road auxiliary facility comprising an upper stage nut part 11; a lower stage nut part 12; and a connecting part 13 for connecting the upper stage nut part 11 and the lower stage nut part 12 by a groove part 14 between the upper stage nut part 11 and the lower stage nut part 12. The lower stage nut part 12 of a nut 10 in which a connecting part 13 is broken through fastening more than a prescribed fastening torque is engaged in thread with a bolt 51 inserted into facility construction material such as a base plate 203, fastened in more than a prescribed fastening torque, an outer appearance of this fastened state is changed from an original shape of the nut 10 under a state in which the upper stage nut part 11 is removed and the lower stage nut part 12 is left, this changed outer appearance can be visually acknowledged from its overall view from a position spaced apart more than a prescribed distance.