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Forums >> Revit Structure >> Technical Support >> Weight and Volume Inaccuracy for Steel Beams in Framing Schedule
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Joined: Tue, Nov 28, 2006
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If you notice that the precision of the calculation for Volume and Weight for a Steel beam is slightly out, this is becuase the calculation in revit does not take the fillet radius into consideration. If you edit the family for the beam and delete the medium detail solid from the family then select the beam again, and go into 'visibility' and turn ''medium' on, resave the beam out and load back into the project. You will notice that the schedule will now calculate those values more correctly.
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Joined: Wed, May 9, 2007
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We noticed also an innacuracy in the wall area also... We tested it down to 2 walls intersecting, if you allow join, then both walls account for the length which they share in common, thus creating more area than they really occupy. (this was in 2008, haven't verified in 2009 yet). But it seems to me that you'd be better off calculating your own amount of steel as a parameter in your family, then you can use valid equations to calc. your true area. I highly recommend always verifying the numbers that Revit tells you, as they seem to be "off" some, usually due to rounding, or conceptual errors that the designers flat out missed. Any other innacuracies out there? + work arounds?
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Joined: Tue, Oct 9, 2007
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 Re: Math/Unit/Parameter Errors
I actually sent in a support request for this and found out: A) Is a defect, it has been noted. C) This is a confusion of how Revit calculates units. The "base" unit for temperature is apparently in Kelvin, so when you have something like that in Fahrenheit you get a funky number. For example, 1 degree F is around 256K, however 2F is ~257L So if you have 30F / 1F you essentially have 272K / 256K = 1.0625, not 30 with no units. So I wouldn't say this is so much a bug with the software, rather an unexpected functionality in regards to how things are calculated. Apparently there are quite a few issues with MEP and math errors. Check out the above thread on AUGI. Nick
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37183_Weight_and_Volume_Inaccuracy.doc