Volume Computations for Spaces' Boundaries

[loh_eng_chu]

Are Volume Computations in “Area and Volume Computations” calculated to Wall Center instead of “at finish faces”, currently a software limitation? If it isn’t, are there ways to tweak the Space Boundary to Wall Center? So that the Volume includes half of that wall.

[ennujozlagam]

try here? thanks

[loh_eng_chu]

Hi @ennujozlagam ,

Thank you for your help. I've tried that way out before, but it apparently works out for bounded areas on 2D only. 3D volume spaces are not recalculated accordingly when i select that checkbox "At wall center". 

Best Regards,

Eng Chu

[ennujozlagam]

Post screen shot here for better understanding of what you are trying to achieve? Thanks

[RDAOU · Accepted solution]

Room/Space volume is calculated up till the face of the walls/bounding element...ie the net volume of the space.

If you want it calculated to centers, you can do one of the following

1. Derive it from the schedule ... set are to wall centers and add a calculated value area x Limit Offset 
2. Make walls not bounding and use space/room separators

[barthbradley · Accepted solution]

Volumes are ALWAYS computed to/from surfaces.  

About Volume Computations | Revit Products | Autodesk Knowledge Network

...read "Note:Room volumes are computed to the wall finish, regardless of the Room Area Computation setting" in attached Link:

Help | How Room Volume is Computed | Autodesk

[ToanDN]

@loh_eng_chu 

Do any of your spaces have a sloped / stepped floor or ceiling?

[loh_eng_chu]

Hi @ennujozlagam ,

Attached is a sample room space selected (in blue), the boundary is up til its finished wall surface. We wish to extend this space boundary to the red dotted boundary which represents the "center of wall" 

This can be done in area 2D, but not in volume 3D currently

Thank you.

[loh_eng_chu]

Hi @RDAOU ,

Thank you for your help, this is interesting. May i know for point 1. At which setup do you set it to wall centers and what formula settings you use for the calculated value area x Limit Offset, if there is a example for it?

Thank you.

[loh_eng_chu]

Hi @barthbradley ,

Thanks for the help and provided shared links. Previously, i'm pondering whether this is currently maybe a software limitation where there is no straightforward answer to it, this is more clear now.

[loh_eng_chu]

Hi @ToanDN ,

Thank you for the assistance. Yes I believe for certain spaces like the WC and some mechanical rooms/duct/risers would have it. Do you know for these such cases, would the volume be computed based on the gradient of the bottom/top level which is the FFL and FCL for that room?

[barthbradley]

I don't know if this will help you now, but another way you can calculate Room Volume from Wall Center is to use Room Separation Lines, in lieu of Walls, to bound your Room.  Manually place the Room Separation Lines a Wall Center and uncheck Room Bounding in your Walls' Properties .  

[loh_eng_chu]

Hi @barthbradley ,

I see, my team have tried this way before. Apparently, it only affects area computation for room boundaries. Spaces boundaries which computes volume is still computed based on wall finishes.

[barthbradley · Accepted solution]

Not sure what's going on over there, but here looks good.   Are you using Room Separation Lines AND unchecking "Room Bounding" under the Walls' Properties? 

[loh_eng_chu]

Hi @barthbradley ,

I've just did that again and it works. Amazing, i think that solves it. Do you know in any way these spaces can be seen as 3D "objects" in 3D view?

Thank you.

[barthbradley · Accepted solution]

https://www.bing.com/videos/search?mid=BBD60A87C09278443200BBD60A87C09278443200&q=revit+rooms+in+3d&...

https://www.youtube.com/watch?v=9qMOyCoYhH0