grade line (vignette)

Site Zoning Vignette and Multiple Choice

grade line (vignette)

Postby berkberkberk » Sat Aug 27, 2016 4:47 pm

HI! How do you guys approach drawing the grade line - the NCARB practice exam shows a swale and ridge, but the contours do not cross the cut line. Dorf advises NOT to interpolate the grade and instead to draw it straight across. On several posts here, i've seen examples where some amount of interpolating was graded as a pass. Advice? Experience? What's the rule on this???

EDIT - I rewatched the Dorf video, and realized that his cut line goes through the 120 contour and the 125 contour, but the NCARB example does not. So, it's not apples to apples. Oh well. I still find his advice on the video to be confusing.
berkberkberk
 
Posts: 6
Joined: Tue Aug 23, 2016 9:12 am

Re: grade line (vignette)

Postby little12 » Sun Aug 28, 2016 7:45 am

Are you talking about the sample passing solution in the guide? If so, look again. The section line DOES touch those contours which causes the "swale" and "ridge". They don't interpolate. You shouldn't either.
little12
 
Posts: 259
Joined: Mon Jan 20, 2014 10:25 am

Re: grade line (vignette)

Postby berkberkberk » Mon Aug 29, 2016 11:51 am

little12 wrote:Are you talking about the sample passing solution in the guide? If so, look again. The section line DOES touch those contours which causes the "swale" and "ridge". They don't interpolate. You shouldn't either.


So, if the contour TOUCHES the cut line (even if it doesn't cross), it counts as a point on the grade line, and that is not interpolating. Is that correct? Testing Saturday!
berkberkberk
 
Posts: 6
Joined: Tue Aug 23, 2016 9:12 am

Re: grade line (vignette)

Postby sbyrktct » Tue Aug 30, 2016 6:26 am

berkberkberk wrote:So, if the contour TOUCHES the cut line (even if it doesn't cross), it counts as a point on the grade line, and that is not interpolating. Is that correct? Testing Saturday!


Yes, that is correct.
User avatar
sbyrktct
 
Posts: 1891
Joined: Thu May 24, 2012 9:35 am
Location: http://arehelp.webs.com/

Re: grade line (vignette)

Postby little12 » Tue Aug 30, 2016 12:36 pm

yes. if it's touching it, then it's crossing it.

If it helps, just look at the section line and identify all the places it "touches" contours. Don't think of them as crossing. You're just finding points and dropping them down to the section.
little12
 
Posts: 259
Joined: Mon Jan 20, 2014 10:25 am

Re: grade line (vignette)

Postby berkberkberk » Wed Aug 31, 2016 8:51 pm

Got it. Thanks everyone.
berkberkberk
 
Posts: 6
Joined: Tue Aug 23, 2016 9:12 am


Return to PPP - PROGRAMMING, PLANNING & PRACTICE

Who is online

Users browsing this forum: No registered users and 36 guests

cron