room areas

[dedaguanno]

I'm having trouble with Revit calculating room areas. It doesn't seem to want to be consistent. Sometimes it grabs to walls, sometimes to room separation lines. It will also calculate differently depending on the orientation of separation lines to each other. Is this typical?

[janunson]

Are you working in an Area plan, or with room tags in a floor plan? Can you post a picture or the problem file?

Generally for room areas, the program starts at the room tag and progresses outward until it hits a room-bounding wall or room separation line, then follows all of those connected objects until it closes a shape. If items cross or overlap, you could get difficult-to-predict results. be sure all corners join correctly, and lines and walls don't cross or overlap. Also make sure that the walls you're relying on to bound the room are in fact room bounding, and that they extend in section high enough and low enough to be caught by the tag.

Revit may appear 'intelligent' at times, but remember it doesn't really 'want' to do anything, it just follows built in rules. It takes a while to get to understand those rules, and once you do, you'll have much more control over what is happening.

[Dimitri Harvalias]

If you are using Room Tags then keep in mind that there are new 8.1 options in the Settings/Area Settings/Room Calculations allowing you to choose where you want the room boundary calculated for the room tag. This is an all or nothing setting and applies to all the room tags in the project.

If you need more control or accuracy than this provides you need to use area plans.

[zulu5d]

Actually, this raises an interesting question about how areas are calculated. When calculating floor space ratios we often push the limits of how they are calculated.

So we calculate area 1500mm from the floor right up to the glass line. We usually use Autocad for that and trace using a polyline. BTW in Australia BOMA standards require tenant areas be calculated 900 mm of the floor.


Other times we need to calculate to the finished surface including the plasterboard or whatever the finish is.

So you can see that there are many ways. Never tried in Revit...can you control the way area is calculated?

[bowlingbrad]

Double check your room bounding properties of the walls in question. Maybe some embedded walls might not need to be room bounding. I've run into this issue before and the room bounding property of a wall is usually the culprit.