Staircase Cut Out

If you ve done the math it s grade school stuff and the layout right the tread cuts will be level and the riser cuts plumb.

Staircase cut out.

Cut a notch along the bottom of each stringer for space to position it over a pressure treated 2 in. In a set of stairs 36 inches wide there are typically three stringers one on each end and one in the middle. You use a framing square to draw the stair s notches on the stringer then you cut them out. Stringer the stringer is the structural part of a set of stairs.

They are cut from 2x12s or larger material the uncut portion of the stringer should not be less than 5 inches 127 mm see diagrams below. Expert carpenter shows you how to measure out mark and cut a stair stringer. Seven inches is a common rise and 11 1 2 a common tread depth. The strength of the stringer weakens if the tread and riser lines are overcut.

Use the first stringer as a template to cut the subsequent stringers. The essence of laying out stair stringers is straightforward. First determine the tread depth and riser height. In the notches at all the tread riser intersections stop cutting when the blade reaches the line.

With these dimensions cut a template with the riser height and the tread depth minus one inch as 2 legs of a right triangle. Use common joist hangers to attach the stringer securely to the upper tier. Pre cut stair stringers are available in a variety of sizes to make this part of the project a bit easier.