Civil 3D Expression

[scampymoogin]

Hello - is it possible to create an expression that will add a letter to a slope label, based on the gradient of the surface.

For example, if the surface slope is steeper than 1:20 (let's say it is 1:18), I would want the label to read R18. In this instance I am describing a 'Ramped' entrance.

If the surface slope is shallower than 1:20 (lets say it is 1:58), I would want the label to read G58. 

 

Thanks

[BIGAL]

Dont know about expression but you may be able to replace the label with what you want as say a text and leader. Post a dwg.