Volume of a room with plinths - Volume doesn't Subtract the Plinth

[Anonymous]

I'm trying to calculate volumes for tank bunds which have concrete plinths inside 1m Sq x 400mm high plinths inside. When i use the tag room command to give me volume on a tag, the volume is the same whether the plinths are there or not, so the volume function is not subtracting the plinths.

I am using a floor slab to create the plinths and just set them on the overall floor - these plinth slabs are 'room bounding'

Any ideas on how to get the volume function to recognize these plinths 

[baniabdelwaheb1]

Hi,

In the Area and volume computations, make sure to select Area and volumes for volume computations.

Cheers

Abdelwaheb BANI

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If it solves your problem, feel free to click Accept Solution.

[Anonymous]

thanks for the reply

Yeah I had that option turned on alright - but still no luck

[baniabdelwaheb1 · Accepted solution]

In section view Check for the room upper and lower limit and verify that it overlay the slabs,

Can you send a section snap shot with color fill legend to verify.

[Anonymous]

ok I've found a solution, with help from your suggestion

I needed to use the create room command from the top down  - so I needed to set limits differently. .

Thanks again

I also got some inspiration from here http://blogs.rand.com/architectural/2012/10/unique-volume-calculations-in-revit.html