Cable Tray width in Revit is inconsistent with standard industry sizing

[brady.harkonen]

I'm a bit confused as to why Revit is designed in such a way that the uneditable system family for cable tray draws the width from the outside dimension but most vendors list their cable trays by rung width which is the inside dimension...

I'm not sure if I am missing something here. Is it standard practice to oversize the tray in the model by the rail thickness so you know it will fit properly and can properly size the wall and floor penetrations?

[Tom_Kunsman]

I just modeled some OoTB cable tray in Revit 2023 and it's dimensions were correct (inside to inside)

Which version or revit are you using where you noticed this dimensional error? 

[brady.harkonen]

Interesting, I just tried in the 2023 default "Metric Systems Template" and it's drawing outside to outside. I thought for a moment it might be a legacy bug from dragging our template from year to year and they fixed it along the way at some point, but this still seems to be doing it.

[brady.harkonen]

Just looking for some further insight on this as I never found a solution. Except to oversize this tray and use an if statement to manually override the tag so it shows the proper width number.