Values of thermal contact resistance are reported for two types of joints: (1) the joint between two blocks of laminated steel, either in direct contact or separated by cement or shims of steel, aluminum, or aluminum foil; (2) the joint between two blocks of cold-rolled steel with various surface finishes. The resistance as measured amounts to 0.3 to 8 in. of additional material, depending upon the configuration. Results are also given in terms of contact resistance.