Expansion joint covers are designed to cater for areas that experience regular movement within a structure. Buildings are designed to allow movement in response to various forces including; thermal expansion and contraction, long-term shrinkage of structures, as well as seismic activity in some cases. The joint covers are installed over these areas to accommodate for such movement while still ensuring the integrity of the structure. These joints are also sometimes referred to as; movement joints, structural joints, isolation joints, control joints, or seismic joints
