Peripherally grooved building blocks in a wall construction

A wall construction of concrete blocks assembled without a binder therebetween and comprising a plurality of linear wall segments each comprising a double layer of blocks with the blocks in one layer overlapping the blocks in the other layer both horizontally and vertically,

• said blocks having identical horizontal sections with the inner faces of blocks in one layer having alternate and equal vertically co-extensive dove-tail grooves and ridges slidably interlocked with similar vertical coextensive dove-tail grooves and ridges in the inner faces of the blocks in the other layer,
• a corner wall segment comprising corner blocks having a plurality of angularly extending block portions joined to the linear wall segments,
• the corner block portions each having an identical half groove and half ridge interlocked in a running fit with the inner faces of end blocks of the linear wall segments,
• two spaced linear wall segments having a beam supported between them at points normally provided for a block in each of said wall segments,
• said beam having end faces formed like the interlocking inner faces of the blocks which they replace at their points of support in the respective wall segments,
• the dove-tail grooves and ridges on said blocks having planar faces which are positioned in face-to-face relationship when interlocked to define a close yet free fit without any noticeable play between interlocked blocks so that the wall is assembled without a binding agent between blocks,
• each block and beam end in said wall construction having a peripheral undercut groove extending completely around its face edges, the edge grooves of adjacent blocks forming undercut double groove channels along the joints, holding non-adhesive resilient packing strips for sealing without binding said joints and providing some frictional sliding movement between load-bearing surfaces of the blocks limited by the lateral clearances between their interlocking faces.