All I need to do is intersect from P1 a sideslope (1:1) and from P2 a superelevation slope (-2%) to create point P3. However, the resulting P3 ends up near point P1 for some reason.
I am having troubles understanding why the calculated point P3 is not working properly. Maybe someone here can enlighten me?
This is my 1st real attempt at using SAC and I know I'm missing a small step here.
Attached is the .pkt file and a .pdf of issue.
Solved! Go to Solution.
I've never used the Superelevation type as an Input Parameter. When dealing with superelevation I always make a "Define Variable" at the very start of the flowchart named "SuperShoulderSlopeCalc" (or whatever type of super I am looking at) with the equation:
Where DefaultSlope is an Input Parameter used if there is no superelevation. Note that the SO looks at outside shoulder, you would want to change these to LO if you are wanting to look at outside lane.
Thank you Kati! That worked great. Don't think I would have ever figured out that expression though?
One final NOOB question.
When adding point and link codes do I need to "Define Variable" for each new code? Such as link codes like "Top, Datum, Pave1, etc" and point codes like "EPS, ETW, etc". Do you add every possible code you might need into separate "Defined Variables" and group them all into a "sequence" at the start of the flowchart?
You can hard enter the codes directly into the point codes and link codes as strings if you want (don't forget to use the quotes around them if you do). I think this is the easiest to do when it is a simple subassembly to begin with.
The benefit to adding a sequence with all the codes set as Define Variables is that it allows you to later change all the codes in one place instead of hunting and pecking through the whole flowchart for every instance that you want to change.
Thank you Kati for your great advice.
The SA is working now as is. However, the last piece of the puzzle to make it fully functional would be to allow the user to select the superelevation parameter vs hard coding in the "LeftOutsideShoulder" or "RightOutsideShoulder" super. Sometimes we match our shoulder superelevation to the lane slopes. It would ensure the shoulders really do match the lane slopes. As well, gives more flexibility to be able to use on an Inside Median Shoulder.
The PKT file is attached with a screenshot.
If anyone has any ideas I'd be most greatful.
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