Johnson-level-tool-mfg RAS-1 Manual do Utilizador descarregar pdf (Página 35)

Theoutsidestepcornersshouldnowbemarkedo(again

seeFigure18).Startingfromthebottomplumbline,mea-

sure up along the top edge of the stringer the distance of

a step incline. Repeat this for each step corner, until you’ve

reached the stringer incline length. Make another step

incline mark for a top plumb line.

Now draw the riser plumb lines for all the steps, using

the square as you did for the bottom plumb line. Finally,

draw a top plumb line. Using the same procedure as you

did for the bottom ﬂoor line, draw all the step tread lines

(seeFigure19).Besuretomeasuredowntheriserplumb

line the distance of the step rise only. Make the last tread

line which will be the top ﬂoor line. If the stringer is to go

below the top ﬂoor boards, add the ﬂoor board thickness

to the step rise when measuring down the top plumb line

todrawthetopoorline(thisistobedonewhenthe

bottom ﬂoor line was found by not taking into account

the tread thickness). If the tread thickness was used, add

the dierence between the ﬂoor board thickness and the

tread thickness.

STEP 3. CUTTING STRINGER PATTERN: The stringer

patternshouldbereadytocut,exceptforanyspecialal-

lowances for anchoring the top of the stringer. Once that

is laid out, you may want to clamp both stringers together

before cutting to be sure the stringers are identical.

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Johnson-level-tool-mfg RAS-1 Manual do Utilizador Página 35