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QTO item area question

4 REPLIES 4
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Message 1 of 5
el.Topo
330 Views, 4 Replies

QTO item area question

hi everybody,

I've been studying the QTO and pay items and reports stuff in c3d

and I realised that while for linear the reports return back the real 3D quantities

for areas they return the projected area and not the 3D one.

 

I created an assembly and attached a lane

I assigned a linear m pay item to the crown (corridor length)

and an area m2 pay item to the top link (pave area)

 

I created a profile which was horizontal (and parallel to a hypothetical ground) and everything returned as expected

when I changed slope to the profile (not changing the station value) the linear updates correctly but the area remains the same reflecting the projected area

 

am I missing something (see attached file)

 

 

MacBook Pro, Intel Core i7 CPU M 620@2.67GHz, 8GB RAM
W7Pro SP1, 64-bit / Civil3D 2016
4 REPLIES 4
Message 2 of 5
fcernst
in reply to: el.Topo

You're not missing anything.

 

I identified this last May when working on a road project. Dave Simeone got on the thread about it. Later one of his senior staff contacted me by email and acknowledged that the quantity should be the true surface area, not projected. He called it the 3D area.

 

He told me then they were working on a solution now to help me out on my project, but I never heard anything back from them on it.



Fred Ernst, PE
C3D 2024
Ernst Engineering
www.ernstengineering.com
Message 3 of 5
el.Topo
in reply to: fcernst

ok thank you,

so I guess the only workaround

regarding areas

is to build surfaces from the corridor links

and regarding volumes the compute materials procedure

...???

 

and the pay items apply correctly to linear and pieces ...

MacBook Pro, Intel Core i7 CPU M 620@2.67GHz, 8GB RAM
W7Pro SP1, 64-bit / Civil3D 2016
Message 4 of 5
fcernst
in reply to: el.Topo

No, the compute materials routine is also confirmed defective in C3D 2014.



Fred Ernst, PE
C3D 2024
Ernst Engineering
www.ernstengineering.com
Message 5 of 5
el.Topo
in reply to: fcernst

what about in c3d 2013?
MacBook Pro, Intel Core i7 CPU M 620@2.67GHz, 8GB RAM
W7Pro SP1, 64-bit / Civil3D 2016

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