Dacheng comb steel plate expansion joint Specifications: Bridge expansion joint separate the structural elements above the basic, and set apart appropriate gap between both sides in order to ensure the structural elements on both sides of expansion joint free flexible in horizontal direction. The wide of sew is always 20_40mm. And then fill in thermal insulation materials. Rubber expansion joint is the flexible transformation when using high elasticity to adapt the change of temperature. And it got good reputation of bridge engineering by its convenient installation, stable running, waterproof, dustproof, little noise, light weight, and low cost and other features. Function: Prevent buildings or bridges appear some cracks because of climate change.