EXPANSION JOINT SYSTEM FOR OPEN AIR STRUCTURES.

摘要

An expansion joint system for bridging an expansion joint gap between two spaced-apart underlying stair structures. The expansion joint system includes a movable plate that is connected to a fixed plate through a hinge. The hinge connection permits the movable plate to move in response to a seismic or thermal event that causes the width of the expansion joint to open to a greater width or close to a smaller width. Following the seismic or thermal event, the hinge connection automatically returns the movable plate to its original position.