ALUMINUM EXPANSION JOINTING APPARATUS FOR A BRIDGE

An aluminum expansion jointing apparatus for a bridge is provided to reduce noise and impact generated by vehicles by using aluminum, which gradually decreases a stepped part due to an incline, as material of a finger plate. An aluminum expansion jointing apparatus for a bridge is formed in seams between top plates of the bridge. The aluminum expansion jointing apparatus for the bridge includes a pair of finger plates(100) of aluminum material, a first support member(200), and a second support member(300). The finger plate is installed between the top plates of the bridge so as to connect the seams, and is gradually worn away by contacting with wheels of a vehicle in order to reduce a stepped part due to an incline. The first support member prevents the finger plate from sinking by stably supporting the finger plate at a lower part of the finger plate. The aluminum expansion jointing apparatus for the bridge further includes a guide member of a "U" shape which guides the first support member to move, and a support box(500) which guides the second support member to move.