Autodesk Revit MEP

[#1]

Hi all. Can anyone here help me with a family creation problem ?

I am starting from the out-of-the-box "Tee Reducing - Threaded - MI - Class 150" and am trying to get this to resemble the welded reducing tee fittings shown in the first sheet of the following PDF (http://www.tfes.com/pdf/flangeSheetMetric.pdf). I am namely trying to create the 2" - 12" reducing tees. After removing the bands and all associated parameters from the existing family, I am running into trouble reconciling the "Center to End" parameters with the C and M dimensions shown in the PDF table.

Replacing the values in the CSV file isn't coming close to the sizes given and I don't seem to be able to edit the following :

text_file_lookup(Lookup Table Name, "CtE1", 0.29 * Nominal Diameter 1 - 0.05 * Nominal Diameter 2 + 0.52 * Nominal Diameter 3 + 0' 0 181/256", (Nominal Diameter 1), (Nominal Diameter 2), (Nominal Diameter 3))

without ending up with an "invalid number of arguments".

After a protracted struggle I have to admit defeat here so any help is welcome.


Many thanks.

Jean-Fred

[#2]

Nevermind I figured it out

[#3]

Good to hsee you figure it out Can you show me how?!

[#4]

In deed i am also interested to know.Please add some link where i can access the learning material

Regards

Syed 

[#5]

It is rediculous that RevitMEP does not provide a good generic family for a reducing tee.  I mean come on Autodesk, this is a fitting that gets used in EVERY Single mechanical/plumbing design. 

After paying some tall coin for this program, I still find myself spending hours on end tinkering with families to get them to work the way I'd like them to. 

It is time that Autodesk hires some Mechanical Engineers with real life design experience to help guide the program designers at Autodesk! 

[#6]

I agree. There are still a lot of holes in this software as far as content is concerned.

Meanwehile I have to say, I am very sorry. I completely forgot about this old post and committed the sin of not posting my solution at the time. I even went and said I had found it. (Neener, neener...)  I don't know why I didn't get notice that others were looking for answers (Or maybe worse ... ignored it..) Anyway, Mea Maxima Culpa.

I am attaching the families that I built along with the associated lookup tables here. Again that's based on the Taylor Forge table in the original post. These families sometimes needed some real massaging in the model to get them to work properly. I don't know if I left something major out while building them. 

NOTE: I am an architect, NOT an MEP engineer. I'd be happy to take criticism from any MEP engineers who look at my families posted here and tell me a better / more accurate way to do it.

So anyway, I learned all I know about lookup tables from this source :

https://projectpoint.buzzsaw.com/_bz_web/MartinSchmid/_PUBLIC/InsideTheSystemContent/Download.dwn?Si...3Fpublic

From there I was able to build my own family for a reducing welded tee instead of trying to modify the flanged one like I attempted originally. I also added Long Radius Elbows, and Concentric and Eccentric Reducers.

I used in Advanced Grapher ( http://www.alentum.com/agrapher/ ) to graph the size table for the fittings which then allowed me to get the function of the curve using regression analysis. That function is what Revit needs in order to approximate the size of the fitting when size data which is not in the lookup table is entered. Otherwise one wrong keystroke and your family explodes. In this case I went  and told it to approximate a linear function. This explains the  (0.98 * Nominal Diameter 3 + 0'  0 17/32")   part in the "Fitting Outside Diameter 3" parameter  in the Tee Reducing - Welded family, for example.

Anyway I hope this helps someone, even if it's late in the game.

Best of luck.

JF

[#7]

any copper reducing tees, or long radius steel welded elbows out there? I think I've looked at every site known to man and no luck.  Trying to get some spool drawings done for a mechanical room and I noticed that REVIT is lacking more than I would have imagined in the actual representation of numerous objects.  Any help is appreciated.  Thanks.

[#8]

How do I get the revit families you posted to show up double line?  It carries the dimension but disappears when going to realistic view or fine/hidden wire frame.  Thanks.