I always use elevation to choose the BCR...water flows downhill so naturally the curve begins where the flowline is higher. My co-worker says it doesn't matter but that he puts the BCR on the more northerly of the 2. Maybe he's right that it doesn't matter, but surely on this forum someone has an opinion.
What do you mean by BCR? Is it back of curb?
jdoswald, post: 326034, member: 8620 wrote: I always use elevation to choose the BCR...water flows downhill so naturally the curve begins where the flowline is higher. My co-worker says it doesn't matter but that he puts the BCR on the more northerly of the 2. Maybe he's right that it doesn't matter, but surely on this forum someone has an opinion.
We generally use the flow of traffic, even if it is uphill. That is, the beginning of a right hand turn = BCR. With one-way streets, YMMV.
Oh - we are talking Begin Curb Return, right?
Steve Gilbert, post: 326040, member: 111 wrote: What do you mean by BCR? Is it back of curb?
I'm referring to the begin or end of curb return.
What would you do if there was a high point in the middle of the return?
report this in the direction you are going. it does not really matter, its just the way I do it
I think what matters is that you're consistent. My boss goes clockwise which would generally follow the flow of traffic method. Works for me. And I'll go with the guy who writes my reviews.
I was taught the BCR is on the main street and the ECR is on the side street.
The plat and/or lath should clarify the situation if a grade sheet with stationing only is provided..
jdoswald, post: 326074, member: 8620 wrote: My boss goes clockwise which would generally follow the flow of traffic method. Works for me. And I'll go with the guy who writes my reviews.
I was going to suggest that you call both ends BCR on some of the returns, and both ends ECR on some of the other returns, deciding randomly, just to mess with the CAD guy who has to process your work. But your method sounds more prudent.
Where I work now it doesn't matter..... But what I was taught was this:
If standing in the middle of the intersection, looking at the curb, it begins on the right, and ends on the left.
You got me thoroughly confused with this comment.
" My co-worker says it doesn't matter but that he puts the BCR on the more northerly of the 2."
That's just crazy. It would make just as much sense to go from the street name starting closest to "B" and ending on the other street that is further from "B".
What would he do if one end was directly east of the other?
It depends on which way I'm walking. The curve begins when I encounter it and ends at the tangent.
I just use PC and PT, sometimes POC. I dont think it matter, as long as you can draw the curve in CAD.
Scott Ellis, post: 326155, member: 7154 wrote: I just use PC and PT, sometimes POC. I dont think it matter, as long as you can draw the curve in CAD.
True for design topo. Naming BCR/ECR comes into play when designing the curb return. When staking, and preparing notes and cut sheets, I use whatever is on the plans.
Is there a civil engineering message board we can ask this question of?
What happens if you reverse BCR/ECR? Do los manos build the curb upside down? :snarky:
Norman Oklahoma, post: 326159, member: 9981 wrote: True for design topo. Naming BCR/ECR comes into play when designing the curb return. When staking, and preparing notes and cut sheets, I use whatever is on the plans.
Is there a civil engineering message board we can ask this question of?
When staking out for construction we give them the ER's and then a Radius Point
Scott Ellis, post: 326163, member: 7154 wrote: When staking out for construction we give them the ER's and then a Radius Point
That's fine if a) the radius is not great and b) the grade is uniform from BCR to ECR. Neither is commonly the case in PDX. Staking 1/4 deltas is the common practice. Also need to account for w/c ramps.
- Surveyors prerogative for topo. Whatever is traditional to your locale.
- Check city/county for plat requirements - different according to each town. Some have a prescribed method.
- The CE will change it anyway.
