Building block

A building block for dry wall construction comprising a body having front and rear faces, opposite end faces and top and bottom faces, one end face having a laterally projecting vertically extending rib with an arcuate outer surface, the other end face having an arcuate recess to receive the rib of a laterally adjacent like vertically extending block in a manner permitting limited relative swivelling movement of two blocks about a vertical axis, one of the top and bottom faces having at least one projection, the other of the top and bottom faces having a laterally extending groove to receive the at least one projection of a vertically adjacent like block in a manner to permit relative lateral adjustment of vertically adjacent blocks and prevent relative forward or rearward movement thereof, and the at least one projection being further from one of the front and rear faces than the groove to cause vertically adjacent blocks to be staggered in an upward and rearward sense, the at least one projection comprising two laterally spaced projections each with a circular periphery.

A building block for dry wall construction comprising a body having front and rear faces, opposite end faces and top and bottom faces, one end face having a laterally projecting vertically extending rib with an arcuate outer surface, the other end face having an arcuate recess to receive the rib of a laterally adjacent like vertically extending block in a manner permitting limited relative swivelling movement of two blocks about a vertical axis, one of the top and bottom faces having at least one projection, the other of the top and bottom faces having a laterally extending groove to receive the at least one projection of a vertically adjacent like block in a manner to permit relative lateral adjustment of vertically adjacent blocks and prevent relative forward or rearward movement thereof, and the at least one projection being further from one of the front and rear faces than the groove to cause vertically adjacent blocks to be staggered in an upward and rearward sense, the front face having a first portion adjacent one end of the block which is rearwardly staggered with respect to a second front face portion adjacent the opposite end of the block.

A building block for dry wall construction comprising a body having front and rear faces, opposite end faces and top and bottom faces, one end face having a laterally projecting vertically extending rib with an arcuate outer surface, the other end face having an arcuate recess to receive the rib of a laterally adjacent like vertically extending block in a manner permitting limited relative swivelling movement of two blocks about a vertical axis, one of the top and bottom faces having at least one projection, the other of the top and bottom faces having a laterally extending groove to receive the at least one projection of a vertically adjacent like block in a manner to permit relative lateral adjustment of vertically adjacent blocks and prevent relative forward or rearward movement thereof, and the at least one projection being further from one of the front and rear faces than the groove to cause vertically adjacent blocks to be staggered in an upward and rearward sense, the rear face having a re-entrant groove extending to at least one of the top and bottom faces shaped to receive and retain a complementarily-shaped anchor member.