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HP Forum Archive 21

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HP 32S-II Vertical Curve Program
Message #1 Posted by Ron Cardwell on 15 May 2013, 1:27 p.m.

I new a guy from many years ago who wrote a program to solve for the elevation on a vertical curve, given station, elevation at BVC. Grade in and grade out, if you enter station to solve for, the elevation would be given. I forgot his name (its been 15 years and I live in a different state now) Does anyone have a program that they have written?

      
Re: HP 32S-II Vertical Curve Program
Message #2 Posted by Eddie W. Shore on 15 May 2013, 4:02 p.m.,
in response to message #1 by Ron Cardwell

If you know the horizontal length of the curve:

LBL E
INPUT I
INPUT G
INPUT H
INPUT X
*
+
INPUT H
RCL- G
2 
/
INPUT L
/
RCL X
x^2
*
+
RTN

Where: LBL E for elevation I = initial elevation (BVC) G = grade in as a decimal X = location of the station H = grade out as a decimal L = total horizontal length of the vertical curve

Hope this helps, Eddie.

            
Re: HP 32S-II Vertical Curve Program
Message #3 Posted by Thomas Klemm on 20 May 2013, 7:54 a.m.,
in response to message #2 by Eddie W. Shore

  • Why do we have to INPUT H twice?
  • Did you ever run that program?
  • I think the correct formula to use is: E= I + GX + H(L - X)

Kind regards
Thomas


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