Abstract: A concrete forming system includes a plurality of forms each comprising a planar upper wall having curved shoulders extending along each edge thereof and side walls comprising upper outwardly tapered portions which facilitate withdrawal of the forms following a concrete forming operation and lower portions extending perpendicularly to the upper wall. The lower portion of each side wall has longitudinally spaced sets of holes formed therethrough with each set comprising a plurality of vertically spaced holes. The forms have open ends, with one end of the form having an outwardly extending lip for receiving the opposite end of an adjacent form to position the exterior surfaces of the form in alignment across the joint therebetween. End caps are provided for receiving the upper walls and the side walls of the forms to close the otherwise open end.