Deck Stair Layout and Stringer Cut Calculator

Change the inputs, then print the two drawing sheets. The diagrams use equal finished risers, a concrete bottom landing, and a standard drop stringer mount.

Finished concrete pad to finished deck surface.
Actual rise is adjusted so every riser is equal.
Physical tread depth is run + nosing.
For this mount, this must equal tread nosing.
192 in = 16 ft.
Set by the responsible designer or local requirements.
Use the tread manufacturer's limit.
Equal risers
Actual rise
Treads
Total run
Stair angle
Blondel

Deck Stair Layout and Stringer Cut Diagram

Calculated concept drawing. Verify the final field measurements, structural details, product instructions, and permit requirements before construction. NTS.

1 Side elevation, complete stair
2 Top detail, standard drop mount
3 Bottom detail, stringer on concrete
4 Typical tread and stringer notch
5 Key dimensions
6 Notes
    SCALE: NTS
    DATE:
    DRAWING: CALCULATED LAYOUT REFERENCE
    SHEET: 1 OF 2

    Stringer Marking and Cutting Plan

    Use the framing-square dimensions shown below. Make and test-fit one stringer before using it as the template for the remaining stringers. NTS.

    7 Full stringer cut profile
    8 Framing-square setup
    9 Cutting sequence
      Inside corners: stop the circular-saw kerf at each layout-line intersection, then finish the corner with a handsaw or jigsaw. Do not overcut past the corner.
      10 Layout stations for field cross-check
      Stations are measured horizontally from the first tread nose and vertically from the finished concrete pad. The stringer seat begins one nosing projection behind each tread nose.
      SCALE: NTS
      DATE:
      DRAWING: CALCULATED STRINGER CUT REFERENCE
      SHEET: 2 OF 2