To provide a support which is prevented from slipping out of hang bolts at the time of mounting the support on the hang bolts, and allows smooth and good insertion of the hang bolts into slots formed therein.

The support 1 is formed like a long plate for supporting cables, a pipe, a conduit pipe, a cable rack, a cable tray, or a duct. The support has apertures 5 formed therein at regular intervals, into which the hang bolts 2 pairing each other and hung from a ceiling at a predetermined interval, are inserted, and an inner peripheral edge of the slot 5a of each aperture 5 is pinched from above and below, by means of a pair of nuts 3 screwed onto each hang bolt 2, and a pair of washers 4 fitted onto the hang bolt 2, whereby the support is horizontally mounted on the hang bolts 2. Herein each aperture 5 is formed of the slot 5a into which the hang bolt 2 is insertable, and a large-diameter hole 5b extending from one edge of the slot 5a in a manner deviating from a center line L of the slot 5a, and having a diameter larger than the width of the slot 5a, so as to insert the nuts 3 and the washers 4 therein.