A laterally cutting saw blade assembly includes a plate that has a pair of opposed faces, a center and a peripheral edge having a plurality of shoulders attached thereto. Each of the shoulders has a pair of opposed faces. The shoulders each have a distal edge with respect to the peripheral edge. The distal edge of each of the shoulders extends between a tailing edge and a leading edge of each of the shoulders. A plurality of teeth is provided. Each of the leading edges has one of the teeth attached thereto. The teeth extend laterally away from each of the opposed faces. The teeth form a plurality of cutting surfaces extending continuously from the distal edge toward the center a distance equal to at least equal to 1.90 cm. The plate is mounted to a cutting assembly and rotated to cut lateral to the opposed faces.