Abstract: A film material is used to create a concrete control joint. A thin plastic film creates a plane of weakness in the concrete to control or induce cracking at desirable locations and directions. A tool for installing the film inserts the film material into fresh concrete.

Abstract: A load transfer device, adapted to be grouted into a core hole drilled vertically through the joint between adjoining concrete slabs, includes a hollow diamond-shaped member and anchoring blades attached to opposite sides thereof. The device permits efficient transfer of shear across the joint while maintaining the necessary flexibility to permit expansion and contraction of the joint. A resilient shield is fitted over the faces of the diamond-shaped member to prevent binding of the grout to the faces and to minimize corrosion. The interior hollow space of the diamond-shaped member is filled with a resilient core to eliminate contamination with road debris and other foreign matter.