Adjustable bolted steel plate connection

An adjustable structural connection assembly comprising:

• a plurality of adjustable structural connections, each comprising:
• a top plate bent along a first longitudinal centerline by a first initial angle forming a first end and a second end, wherein the top plate includes a front hole at the first end and a front hole at the second end;
• and
• a bottom plate bent along a second longitudinal centerline by a second initial angle forming a first end and a second end, wherein the bottom plate includes a hole at the first end and a hole at the second end, wherein
• when the first longitudinal centerline and the second longitudinal centerline are substantially aligned along a vertical axis,
• the front hole at the first end of the top plate vertically overlaps the hole at the first end of the bottom plate, and
• the front hole at the second end of the top plate vertically overlaps the hole at the second end of the bottom plate, and
• wherein tightening bolts placed through each of the vertically overlapping holes of the top plate and bottom plate, when tightened around a joint having a joint angle that is different from the first initial angle and the second initial angle, cause the top plate to bend along the first longitudinal centerline by the joint angle and cause the bottom plate to bend along the second longitudinal centerline by the joint angle;
• wherein each adjustable structural connection is operable to be fitted to joints within a respective range of angles that includes angles above or below the respective initial angle by a threshold amount.