Pipe labels 2007

[Anonymous]

I have a label style for pipes that labels 2d length to inside edges. The problem is that the label is giving the wrong length. When i measure the length i get an error of around 0.15 to 0.00, each pipe segment with a unique amount of error. Is this happening to anyone else?

[Anonymous]

how are you measuring the length to double check the software? When I show my lables for pipe I have it round to nearest foot. I wouldn't notice if it was short by 0.15'.

[Anonymous]

I measured with the measure tool first. Then i drew a line and flattened it then list. They both gave the same dist... I usually have them label to the nearest foot also, but i was noticing some weirdness. That's why i started checking it out. Shouldn't the distance be exact?

[Anonymous]

what osnap are you using to get the measurement? your measuring a pipe segment that was created with civil 3d correct?

I normally would pick insertion to insertion so that I got center to center length.

But your trying to get a distance from the inside of the structure to inside of the structure?

Thats a bit tricky since the pipe has to stick into the structure somewhat or there would not be a wateright seal.

so are you trying to measure from the point the outside of the pipe penetrates the inside edge of the manhole?

[Anonymous]

I am using a block to display my inlets. The block shows the inside wall. I am snaping to the midpoint of the line that represents the inside wall of the inlet. I am attaching a screen capture of the block. And yes the pipes were created with civil 3d.

[Anonymous]

What 3d part are you using to represent this structure? If your using a concentric cyndrical structure and using a rectangular block to represent the structure in the plan view. i think this might be the discrepancy.

[Anonymous]

The structure i am using is a

Rectangular Junction Structure NF

24 x 48 inch Rectangular Structure Mat_Reinforced Concrete SF_Standard SG_Standard SC_Standard

If you look closely at the screen capture from the last post you will see red lines that represent the actual 3d structure.

[Anonymous]

Joe and I talked about this today and I contacted Scott Kent at Autodesk to
ask him how pipe lengths were calculated and I think we figured out why it
might be squirrely:

From Scott:
"For 2D center to center, it's just a simple distance between 2 coordinates
calc. For 2D inside edge to inside edge, it's the distance from outer wall
to outer wall, plus wall thickness of structure 1 plus wall thickness 2,
plus a calc for projection into the structures."

The last part about projection into the structures, etc. seems like it might
give you a slightly different measurement every time depending on how you
hit the structure. A few degrees either way, or a different slope or
whatever might just be enough to throw it off.

I don't know the best solution, but at least we aren't imagining it.


--
Dana Breig Probert, E.I.T.
http://www.civil3d.com
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