Johnson-level-tool-mfg RAS-1 Manuel d'utilisateur télécharger pdf (Page 30)

STAIR LAYOUT EXAMPLE

With our square, stair layout can be done simply and

eciently. The layout can be done without hours of calcula-

tions.Basicmathandtheuseofacalculatorwithasquare

root function are all that are needed.

STEP 1. FIND STEP MEASUREMENTS: We start with the to-

talrise(seeFigure17)tondthenumberofstepsrequired.

If the rise is not known, measure the vertical distance

between the lower ﬁnished ﬂoor and the upper one. When-

ever a quantity is known, use it instead of calculating it.

NOTE 1Beforestartingyourlayout,checklocalandstate

codes for tread width, length and step rise requirements.

Many states have stairway construction regulations.

NOTE 2 It’s a good idea to check your layout on paper or

cardboard before cutting out the wood steps.

FIG. 17 Stair Layout.

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 66 67

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Johnson-level-tool-mfg RAS-1 Manuel d'utilisateur Page 30