There are two basic forms of construction depending on the number of layers in the expansion joint; single layer construction and multi-layer construction.
An expansion joint formed of one consolidated layer, often constructed from elastomers and reinforcement materials or
fluoroplastics and reinforcement materials:
An expansion joint in which the various plies are of different materials which are not integrally bonded together.
There are three types of clamping configurations that employ one of the two basic constructions.
An expansion joint in which the flexible element is made like a flat belt:
An expansion joint in which the flexible element has flanges formed at right angles.
An expansion joint that utilizes both belt type and flanged configurations.