HSS shape callouts

[Anonymous]

I have noticed Revit uses decimals is the thickness is square and rect. HSS's. However it uses fractions for the diameter in HSS pipes. In our office we call out square and rect. HSS thicknesses with fractions, which is the standard in AISC, example HSS4x4x1/4. We also call out pipe sections per AISC using decimals to the third place ex. HSS4.500x.237 I assume Revit did it this way because of the transferring of files with the analytical software. i was just wondering if other structural firms were sending out drawings in Revit using it's HSS designation or are you changing the tags to read per AISC. If you are changing the designations than how? And does it cause any problems with the transferring of information between the analytical programs.

[KSI_Thor]

We have issued drawings using the Revit designations for HSS shapes. I was going to place dumb text to replace the tags, but the sizes were changing too much and it was much easier to leave the tags.
There are a number of issues Autodesk has to address for the next version of Revit. I am still having problems with Revit mitering concrete beam joints and it makes the drawings look terrible.

[Anonymous]

Revit actually uses 3 place decimals for HSS-Round Hollow Structural
Sections; example: HSS16X.500. In this they are closer to the AISC standard
designation, but not quite. Notice the capital "X" they chose while AISC
chose lowercase "x" as you noted.
The way Revit makes these members, it pulls data from a text file,
\Revit\Imperial Library\Structural\Framing\Steel\HSS-Hollow Structural
Section.txt, or
\Revit\Imperial Library\Structural\Framing\Steel\HSS-Round Structural
Tubing.txt,
which can be easily edited to produce correct nomenclature (I have done this
and it works). There is a separate text file for each of the shape families,
as well as another set of text files for columns which have different
parameters than framing members. The rub is that all said text files would
be overridden when the next release gets installed so you would need to
re-name families and text files to preserve your editing.
How very arrogant of Autodesk to reject industry standard nomenclature in
the first place!
I've heard that the decimals for the square/rectangular HSS's have been
corrected to fractions in the latest release, but haven't seen it yet. We
can only hope that they corrected the "X"s as well. This is an easy fix that
Autodesk should rightly do, we shouldn't have to.

wrote in message news:5819909@discussion.autodesk.com...
I have noticed Revit uses decimals is the thickness is square and rect.
HSS's. However it uses fractions for the diameter in HSS pipes. In our
office we call out square and rect. HSS thicknesses with fractions, which is
the standard in AISC, example HSS4x4x1/4. We also call out pipe sections
per AISC using decimals to the third place ex. HSS4.500x.237 I assume Revit
did it this way because of the transferring of files with the analytical
software. i was just wondering if other structural firms were sending out
drawings in Revit using it's HSS designation or are you changing the tags to
read per AISC. If you are changing the designations than how? And does it
cause any problems with the transferring of information between the
analytical programs.

[Joe.Charpentier]

Don't forget that renaming the member sizes in the Revit content can affect import/export with Analysis packages.
Check with your analysis link provider if you have problems after renaming sizes.

Joe

[Anonymous]

Joe
That is why i was hesitant to change the first parameter in the .txt file. Right now we plan to added another parameter to the .txt file called "altname". Then we would make a new tag that would read this new shared parameter.

[Anonymous]

Jim
Yes Revit does use the 3 place decimals for the rounds for the thickness but they use fractions for the outside diameter. We call out HSS4.500x.237 whereas Revit would call this 4 1/2x.237.

[Anonymous]

I actually did quite a bit of experimenting with this (RS 2008 > RevitLink > Ram 11.x) and am very confident that changing the X to x in the txt files works in this case. The fractions still do not. Even worse than HSS callouts are angles! L2-1/2X2-1/2x1/4 is impossible to read.

I first created a new TTF with real fractions, changed the txt files to read as these actual fractions, ran a quick Revit model and exported to Ram. None of my fractions survived the translation. They showed up fine in Revit on screen and in element properties but in Ram it was HSS4x4 both on screen and in any "show size" windows. Oddly, a straight Revit fraction HSS6X6X.500 will automatically translate to HSS6x6x1/2 in Ram. Bentley tells me it simply can't be done.