Abstract: This invention describes foundations for buildings and like structures employing steel reinforcement. The invention describes a hook leg having an elongate member bifurcated at each end longitudinally of the member to form a pair of extensions with a slot therebetween, the distal portions of the extensions being bent into a curved form extending transversely of the member to form hooks adapted to resiliently engage a pair of reinforcing rods in the reinforcement, the slots in the unbent portions of the extensions being adapted to receive a second pair of reinforcing rods extending transversely of the first pair, whereby to fix the rods in spaced alignment. The invention minimizes movement or collapse of the reinforcement and makes it much easier to assemble the foundation cage thereby saving in labor and material.