Daylight

[romanshirshov]

Hi

I am new to AutoCAD Civil 3D. Just wondering if anybody can give me a good definition of the term "daylight" please.

Thanks

[Joe-Bouza]

In civil engineering this term typically means where a proposed feature meets existing ground.

As in where does my cut slope see daylight, or where does the outfall pipe see daylight. A fill slope also daylight but it was never really in the dark so the anecdote doesn't fit quite so neatly.

[fcernst · Accepted solution]

1. Start at a desired beginning point elevation that can be either above or below a certain surface. 
2. Extend a line at whatever desired slope until there is an intesection with the desired surface.
3. The surface intersection point at the end of this desired slope is the Daylight point.

I believe the derivation is from an agricultural origin for draining fields through embankments. "Run this pipe to daylight in order to drain this area".

[romanshirshov]

Fred

You have been very helpfull.

Thanks

Roman Shirshov-Menzel

Graduate Civil Engineer

[romanshirshov]

Thanks Joseph