Stair stringer assembly, system, and method

A bilateral bracket for steps to be fixed on a stringer having a number of steps and risers, the bilateral bracket comprising:

• a generally flat body defining a framing edge having a riser edge and a tread edge;
• the riser edge having a riser flange perpendicularly extending therefrom in a first direction;
• the tread edge having a tread flange perpendicularly extending therefrom in the first direction, wherein the tread extends between a distal end and a proximal end;
• the riser and tread edges defining an acute angle relative to each other, wherein the flat body does not project beyond a profile defined between two lines orthogonally drawn from each of the distal and proximal ends;
• and
• a stringer edge along the body, opposite the framing edge, wherein the stringer edge has an array of holes for selectively attaching to either side of the stringer in one of a plurality of orientations so as to adjust an elevation of the tread edge relative to said stringer.