Johnson-level-tool-mfg RAS-1 Manual de usuario descargar pdf (Pagina 31)

1.Findtheapproximatenumberofstepswiththefollowing

formula:

TOTAL RISE (inches)

APPROXIMATE NO. OF STEPS = 7"

 Forexample,let’sassumea8'6"rise=102”

102"

APPROXIMATE NO. OF STEPS = 7"

= 14.57"

NOWTHEACTUALNUMBEROFSTEPSWOULDBETHE

WHOLENUMBER,IGNORINGANYFRACTION,i.e.,14STEPS.

Next,ndtheactualsteprisebyusingthefollowingcomputation.

TOTAL RISE (inches)

ACTUAL STEP RISE =

NO. OF STEPS

Inourexample: 102"

ACTUAL STEP RISE = 7.29"

2.Nowndthesteprun(ortreadwidth)bysubtracting

thesteprisefrom171/2":

STEP RUN = 17.5" - ACTUAL STEP RISE

= 17.5" - 7.29"

= 10.21"

Thus the total run is:

TOTAL RUN = STEP RUN x (NO. OF STEPS – 1)

= 10.21" x (14 – 1)

= 10.21" x (13)

= 132.73"

Finallywecalculatetheinchrise(similartotherafterinchrise):

ACTUAL STEP RISE (inches) x 12

INCH RISE =

ACTUAL STEP RUN (inches)

7.29" x 12

10.21"

8.57"

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Johnson-level-tool-mfg RAS-1 Manual de usuario Pagina 31