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Valued Mentor
fcernst
Posts: 1,006
Registered: ‎01-07-2011
Message 11 of 14 (138 Views)

Re: shoulder slope subassembly

01-23-2013 06:15 AM in reply to: KMercier_C3D

Right, that figure he posted, you may not have seen it, shows the OP's shoulder slope criteria is not a simple direct relationship to lane slope.

 

 

Ernst Engineering
Fred Ernst, PE
C3D 2014 SP1
W7x64; i7 8gb; Radeon HD 5700
www.ernstengineering.com
Distinguished Contributor
Posts: 423
Registered: ‎11-17-2005
Message 12 of 14 (137 Views)

Re: shoulder slope subassembly

01-23-2013 06:16 AM in reply to: KMercier_C3D

thanks for all the input.

no, the shoulder doesn't match the lane slope all the time, only in certain instances where the lane slope is greater than 6%. between -1% and 6% the shoulder stays at 6%. from -1% to -5% the shoulder varies in relation to the lane slope. if the lane slope is -3.2% then the shoulder slope is 3.8%. at -6% and greater it becomes crowned. it is a pita. like i said, i've got a profile for the shoulder but any change in alignment or profile really becomes time consuming.

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KMercier_C3D
Posts: 223
Registered: ‎12-14-2010
Message 13 of 14 (134 Views)

Re: shoulder slope subassembly

01-23-2013 06:19 AM in reply to: fcernst

I stand corrected. I had missed the *.png that was posted. Definitely an ideal situation for SAC and really a rather simple one at that. I'd still use Parameter References though and have the shoulder SAC have an input parameter of the lane slope and then the shoulder is calculated and generated from there. 

Kati Mercier, P.E.

Co-author of "Mastering AutoCAD Civil 3D 2013"
AutoCAD Civil 3D 2013 Certified Professional and AutoCAD 2013 Certified Professional
AU2012 Speaker::: CI3001: Reverse Engineering with Subassembly Composer for AutoCAD Civil 3D
AU2011 Speaker::: CI4252: Create Subassemblies That Think Outside the Box With Subassembly Composer for AutoCAD® Civil 3D®
Valued Mentor
fcernst
Posts: 1,006
Registered: ‎01-07-2011
Message 14 of 14 (128 Views)

Re: shoulder slope subassembly

01-23-2013 06:25 AM in reply to: KMercier_C3D

Yes, that would work through most of the criteria range, except for those steep lane slopes at the top of the criteria range, where it looks like he has a crowned shoulder that is smoothed with a fillet, which SAC could easily handle.

Ernst Engineering
Fred Ernst, PE
C3D 2014 SP1
W7x64; i7 8gb; Radeon HD 5700
www.ernstengineering.com

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