Patent ID: 8745953

Claim:
A retaining wall building block for receiving fill material during construction of a retaining wall, the block comprising: a cast cement body having a base, a generally upright face wall extending upward from the base, two generally upright side walls extending upward from the base and generally rearward of the upright face wall, the base, upright face wall, and side walls each having an inner and an outer surface, the side walls each having a top and a rearward most end, an elongate slot in the base, the elongate slot having a length, L s , measured in a direction parallel to the face wall and perpendicular to the side walls and a width, W s , measured in a direction perpendicular to the face wall and parallel to the side walls, with the ratio of L s to W s being at least about 5:1, respectively, the elongate slot being centrally located between the inner surfaces of the side walls, and a fill receiving cavity defined by the base inner surface, side wall inner surfaces and face wall inner surface for receiving fill material, the fill receiving cavity having a fill receiving volume wherein the ratio of the fill receiving volume to the volume of the retaining wall building block is at least 1.1:1, respectively.