This Architectural Drawing is AutoCAD 2d drawing of Details of Contraction Groove. Contraction/Control Joints. Contraction/control joints are placed in concrete slabs to control random cracking. A fresh concrete mixture is a fluid, plastic mass that can be molded into virtually any shape, but as the material hardens there is a reduction in volume or shrinkage. The principal function of vertical contraction joints is to control cracking due to foundation restraint, foundation geometry, and thermal volume change. Contraction joints also have been used as formed construction joints that divide the dam into independent work areas or monoliths. For more details and information download the drawing file.
