SAG MEASURING APPARATUS FOR SAFETY CHECK-UP OF BRIDGE IN WHICH LIGHT BULBS ARE INSTALLED TO INDICATE SAG OF BRIDGE

摘要

PURPOSE: A sag measuring apparatus for safety check-up of a bridge is provided to quickly and safely prevent an occurrence of a large accident by previously detecting an abnormal state of an upper plate of the bridge through light of a bulb installed at an upper part of the bridge when the upper plate of the bridge is extremely sagged. CONSTITUTION: A coupling plate is installed at an upper end between bridge structures(100). A switch and a bulb are attached to the upper end between the bridge structures(100). A coupling pin is welded and fixed to a lower end of the upper plate of the bridge. The coupling pin operates a switch attached to a coupling member so as to light a bulb when a slag state of the bridge is beyond allowance, thereby detecting problems of the bridge.