Construction block - has ribs along upper face and projections on end faces for even spacing

摘要

The block has two ribs (1) along its upper face, two projections (2) on one of its end faces, and a single central projection on the other end face. When the blocks are laid in courses on top of one another the ribs and projections act as spacers, ensuring equal vertical and horizontal gaps between the blocks for a mortar. In variants the ribs can be located along the bottom of the bloc rather than the top, and the block can be made from various materials. ADVANTAGE - Even block laying and spacing with no need for line or plumb-bob, quick and simple to lay.