Construction layout block

A construction layout block comprising a triangularly shaped body having a triangular bottom;

• a base wall and two side walls extending up from said bottom;
• base wall junctures formed about intersections of said base wall and said side walls, and an apex juncture formed about intersections of said side walls;
• a top;
• a first artifice capable of holding a chalk line positioned inclusively from a first of the base wall angle junctures to the apex juncture, and at least one second artifice capable of holding a chalk line positioned from a second of the base wall angle junctures and up to but excluding the apex juncture;
• a laser target notch located at the apex juncture;
• a ruler scale, and a contrivance for holding a tape measure by its distal end—wherein the block has relative immovability to resist a force of pulling on a chalk line with the same attached to the block during layout.

A construction layout block comprising a substantially prismatically triangularly shaped body, having a triangular bottom surface;

• a base wall and two side walls extending up from said bottom;
• base wall junctures formed about intersections of said base wall and said side walls, and an apex juncture formed about intersections of said side walls;
• a top surface, which is separated from by a substantial distance, opposes, and is substantially the same size and shape as the bottom surface, which is substantially planar, and which intersects with and spans substantially completely among said walls, such that the block is generally in the form of a triangular prismatic block having five major external surfaces to form a wedge shape for the block body;
• and at least one of the following features:
• an artifice capable of holding a chalk line;
• a top carrying handle;
• a laser target notch;
• a rear reference system;
• a top alignment system;
• a ruler scale;
• an intrinsic level;
• and
• a contrivance for holding a tape measure by its distal end;
• wherein the block has relative immovability to resist a force of pulling on a chalk line with the same attached to the block during layout.