Overcutting the Stairway Stringer

Notching dimension lumber to build cut stringers (see illustration below) is a common practice that takes into consideration only the depth of wood beneath the tread-riser notches as effective in resisting the applied load. For cut stringers, care should be taken not to overcut the limits of the notch. Overcutting notches in stringers is a major defect.
Notching dimension lumber to build cut stringers (see illustration below) is a common practice that takes into consideration only the depth of wood beneath the tread-riser notches as effective in resisting the applied load. For cut stringers, care should be taken not to overcut the limits of the notch. Overcutting notches in stringers is a major defect.

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