Patent ID: 6467229
Filing Date: 2002-10-22
Classification: E04B

Abstract:
A building block for stacking with other like building blocks to fabricate a wall, said building block having top, bottom, front, rear and first and second end surfaces, the front and rear surfaces being substantially planar, the top surface having a ridge and the bottom surface having a channel with a width dimensioned to interfit said channel with the ridge on the top surface of another of said building blocks, the channel having a depth and the ridge having a height, the depth of the channel being less than the height of the ridge for forming a gap between the front surfaces of vertically stacked blocks, the first end of the block comprising a first square notch extending from the top to the bottom of said block and being open to the front, the second end of said block comprising a second square notch extending from the top to the bottom of said block and being open to the rear, the forwardly open first square notch of one said block being dimensioned to overlap with the rearwardly open second square notch of another of the blocks, the second end of the block further having a forwardly open square notch to provide a vertical gap between blocks in a course of stacked blocks, wherein the front surface of said block, adjacent said first notch open to the front, extends laterally to form a short flange coplanar with said front surface, overhanging the edge of block.