Stretch fibre cable from the center of the columns in the building location, fixed wire nailed. Measure the distance from the wire through the wall to determine the margin side deviation
Fiber cords stretch from the center of the column at the position of walls, wire nails fixed. Measure the distance from the edge of the wire through the wall 2 to determine deviation
The wall of the edge is determined from the center position with a fixed pin from the center position, and the wire is used to determine the deflection of the side wall of the edge from the line.