Steel profile (structural framing) volume/mass differs from internet/book table data up to 5-7% (in medium detail level!)

[roman.hruljov]

Hi! 
I have found that steel profile (structural framing) volume/mass differs from table data. 
This is because Revit calculates volume only by medium detail level of cross section. For example, if it is closed section like rectangular hollow section (RHS), then in medium detail level cross section is box without radii - volume is apox. 5-7% bigger. 

If it is open beam section (H, I or U), then in medium detail level cross section is like welded plates without radii - volume is apox. 5-7% smaller.
In small projects mass difference of 5-7% is not significant, but in big project Customer offen checks total mass by table data from internet/book. For example 7% from 500 000kg is 35 000kg!
Taking volume from Schedule Material takeoff is not a good idea i think, if we need to do Structural Framing Schedule with steel beam dimensions, count and mass.
In short - please let us do volume/mass count by FINE detail level cross section.

[piotr_pysz]

Hi @roman.hruljov , thanks for the feedback. 
Please note that your Idea is part of the project that we are currently working on.
Please check the public roadmap - In progress tab. There is a card called 'Enhanced weight & length parameters for steel design, estimation, and procurement'.