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Framing

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  • Introduction to Framing
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There's a Better Way Video Tips

Lay Out Accurate Stair Stringers With This Custom Tool

A slotted shop-made fence on a framing square takes the place of stair gauges for a more reliable layout on rough-edged lumber.

By Official Fine Homebuilding Post

If you’re framing a staircase, you could hope that the stair gauges on your framing square bear against the edge of a nice straight board, but they may not—in that case, there’s a better way.

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If you’ve got to make a really accurate cut with your sliding compound saw, you could sneak up on that cut to get exactly where you want to be, but there’s a better way.

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Framing Stairs

View Comments

  1. MikeWise | Oct 14, 2013 09:22am | #1

    Nice tip; quick and very practical! I'd like to add another level to this for those that like to be even more precise with a challenging board. What if the board you're cutting has a crown and you want your stringer to be perfectly straight? You know, so straight that you can lay a long straight edge on the nosing of all the treads and just ride them up and down with zero rocking of the straight edge due to that crown? AND, you don't want to take the time to straight-line rip the board with your Festool or plane it to create that perfectly straight edge? Here's what I do: Measure in, say 3/4", from the edge at each end of the board and snap a a nice, crisp chalk line to register your framing square to. It works great and, if the underside of the stringer doesn't require a perfect finish the reverse of that crown doesn't matter. You can use boards you would normally reject and you won't necessarily be sizing up to wider boards unless the crown is really excessive. You can snap a line and true up the bottom edge too if desired. I also use this method with rafter patterns sometimes.

  2. charles3 | Oct 14, 2013 09:55pm | #2

    I don't understand why the straight edge is kerfed. Why can't you just clamp a straight 1 x 2 or 2 x 2 under the square without trying to trap the square in the kerf?

  3. Artworks54 | Oct 15, 2013 06:48am | #3

    I built mine in apprentaceship back 20 yrs. ago out of 2 pieces of hard maple. Instead of clamps, I used 3 small bolts , washers & wingnuts. I still have my stair gauges, just incase.

  4. rwotzak | Oct 15, 2013 09:23am | #4

    charles3,
    My guess would be that the kerf helps hold the straightedge in place while you're positioning and clamping it, but I'm sure it would function just as well if you just clamped a plain board on the side of the square that you wanted to bear on the stringer.

  5. ronbudgell | Oct 15, 2013 10:18am | #5

    Mine is getting close to 30 years old now. I lock it on a square with machine screws and wing nuts which pass through elongated slots. What makes the slotted/kerfed version better than a board clamped on the face of the square is the ability to flip the square or use both sides of the fence without messing about. I couldn't count the number of stairs and rafters I've laid out with that tool. The pattern for mine came from an English book on the steel square dating from about a century ago.

  6. User avater
    jeremiahschwenger | Oct 20, 2013 11:15am | #6

    I used this one this weekend on some finicky trim pieces and it works great! Simple and effective! Thanks again chuck! Cheaper than the sonic stop!

  7. nwinther | Oct 24, 2013 11:25am | #7

    Test

  8. BobboMax | Oct 27, 2013 09:33pm | #8

    John Carroll, the originator of this tip, wrote a book, Working Alone, which is worth a read- he's gotta be the laziest guy on the face of the earth- he's come up with more ways to save time and effort than any three normal people. Another of his books, Measuring, Marking and Layout, A Builder's Guide, is also worth owning and reading.

  9. Justinthecarpenter | Nov 26, 2020 01:51pm | #9

    Can't you just layout on the opposite face ? Or save a nicer piece of lumber for the stringer?

  10. cmascolo | Nov 26, 2020 02:55pm | #10

    But who would use a crappy piece of lumber like that for a stair stringer?

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Framing

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Introduction to Framing
  • House Framing Concepts, Tips, and More
Framing Tools, Techniques, and Materials
  • Tools
  • Techniques
  • Framing Lumber
  • Steel
Framing Floors
  • Floor Framing
  • Engineered Floors
  • Floor Sheathing
Framing Walls
  • Wall Framing Basics
  • Layout
  • Wall Assembly
  • Raising and Straightening Walls
  • Framing Rough Openings
  • Blocking
Framing Stairs
  • Stair Layout
  • Building Stairs
Framing Roofs
  • Roof-Framing Basics
  • Roof Design
  • Laying Out and Cutting Rafters
  • Framing Valleys
  • Working with Trusses
  • Dormers
  • Special Situations
Efficient Framing Methods
  • Advanced Framing
  • Double-Stud Walls
Timber Framing
  • Timber-Frame Construction
  • Timber-Frame Design

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