HP 32S-II Vertical Curve Program

[Ron Cardwell]

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?

[Eddie W. Shore]

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.

[Thomas Klemm]

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

Kind regards

Thomas