Patent ID: 8429873

Claim:
A modular construction panel, comprising: a panel having a height, opposed first and second faces, and opposed ends, each end being generally vertical; a keyway receiver integral with the panel adjacent one of the panel ends; and a keyway spline integral with the panel adjacent another of the panel ends; wherein the keyway receiver includes: a generally planar proximal face extending generally vertically and having opposed ends; a first offset face extending from one of the proximal face ends, the first offset face being generally vertical and being angled relative to the proximal face to form an opening of more than ninety degrees between the first offset face and the proximal face; and a second offset face extending from another of the proximal face ends, the second offset face being generally vertical and being angled relative to the proximal face to form an opening of more than ninety degrees between the second offset face and the proximal face, the angle of the opening between the second offset face and the proximal face being at least thirty percent greater than the angle of the opening between the first offset face and the proximal face; wherein a generally vertical wall extends from the keyway receiver first offset face and another generally vertical wall extends from the keyway receiver second offset face; the wall extending from the keyway receiver first offset face, the wall extending from the keyway receiver second offset face, and the proximal face being generally parallel; the wall extending from the keyway receiver second offset face being inset toward the proximal face from the wall extending from the keyway receiver first offset face; wherein the keyway spline includes: a generally planar distal face extending generally vertically and having opposed ends; a first offset face extending from one of the distal face ends, the first offset face being generally vertical and being angled relative to the distal face more than ninety degrees and less than one hundred and eighty degrees; and a second offset face extending from another of the distal face ends, the second offset face being generally vertical and being angled relative to the distal face more than ninety degrees and less than one hundred and eighty degrees, the angle between the second offset face and the distal face being at least thirty percent greater than the angle between the first offset face and the distal face; and wherein a generally vertical wall extends from the keyway spline first offset face and another generally vertical wall extends from the keyway spline second offset face; the wall extending from the keyway spline first offset face, the wall extending from the keyway spline second offset face, and the distal face being generally parallel; the wall extending from the keyway spline second offset face being outset toward the distal face from the wall extending from the keyway spline first offset face.