This statement was developed by the Public Health Nursing Definition Document Task Force. under the direction of the leadership of the Public Health Nursing Section of the American. Public Health Association. The statement was adopted by the Public Health Nursing Section.
GIMBAL EXPANSION JOINT. A gimbal Expansion joint is an assembly designed to absorb angular movement in any plane. The gimbal hardware consists of two sets of hinges, connected to a common floating gimbal ring, which is designed to absorb the pressure thrust of the Expansion joint assembly.
An expansion join is installed when pouring against a vertical surface (garage slab), and at roughly 20' to 25' intervals. A control joint is scribed into the slab with a Scoring Tool or a concrete saw, at 10' to 12' intervals.====edit2==== A correction in termonology: An expansion joint is a peice of felt that you place between old concrete and new concrete (or between concrete and brick). You install it before you pour. I believe that you were really taliking about control joints.