Tan(Δ/2) in the Alignment Grid View details

[gaurkarv9]

Dear community members,

I 've copied the details of horizontal alignment using the "Alignment Grid View" option. Thus I created my MS excel file of horizontal alignment attributes. The excel file is attached herewith. My question is, how can I find ready-made Tan(Δ/2) value. I have to find Ts for the horizontal alignment curve box. 

Thanks in advance.

[KirkWM]

If I understand the situation, T (stated as RTan(Δ/2)) should be the same as the "External Tangent" column in the alignment data panorama.

[KirkWM]

OH wait, are you talking about spirals?

[gaurkarv9]

Yes...Its about spirals

Ts=((Radius+Shift)*Tan(Δ/2))+k...

Any solution to find Tan(Δ/2) quickly from that excel file ?

[wfberry]

Why not explain what you are wanting to do.  Are you trying to draw this layout or what?

Bill

[gaurkarv9]

I have drawn the alignment. I want to create the horizontal curve boxes (which I have to give to draftsman). The details like super elevation, speed, radius, shift, deviation angle etc. have been done. The remaining thing is Tan(Δ/2). If I go to find it out manually, its going to consume much time. So I am asking (with the help of excel file), how to find this Tan(Δ/2) with minimum time and effort ?

[wfberry]

If you have drawn everything, the easiest way to find "delta" is to label the deflection angel at the main P.I.

Bill