Forums >> Revit Structure >> Technical Support >> Spot Elevation Relative to Floor

ndb110

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Joined: Fri, Apr 22, 2011
3 Posts

I have a plan with multiple slab on grade levels and I want to call out top of steel relative to slab(s).  Can the elevation origin be set to a reference plane in order to accomplish this?

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WWHub

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Joined: Tue, May 16, 2006
13079 Posts

From your HELP <<  Always the best place to start.

Elevation Origin If the origin value is set to Project, then the elevation reported is with respect to the project origin. If set to Shared, then the elevation reported is with respect to the shared origin. If the base value is set to Relative, then the elevation reported is with respect to the level in the Relative Base instance parameter. You can change the shared origin by relocating the project. See Relocating and Mirroring a Project.

Changing Elevation Reporting

A spot elevation can report elevations relative to project origin, shared origin, or a specified level.

1. Place a spot elevation, and then select it.
2. On the Properties palette, click (Edit Type).
3. Under Text, specify a value for Elevation Origin. For more information about the values, see Spot Elevation Type Properties.
4. If you selected Relative, click OK and, on the Properties palette, select the value for Relative Base.

NOTE _ I do not know if the relative base is one location only.  I've not used it this way. and would not.

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ndb110

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Joined: Fri, Apr 22, 2011
3 Posts

Thanks - but I want to use multiple "relative" origins - related to the top of slab in each area.  Not sure if that is possible.

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WWHub

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Joined: Tue, May 16, 2006
13079 Posts

I really don't understand people who don't even try a simple thing like this before posting.  Wow!

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ndb110

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Joined: Fri, Apr 22, 2011
3 Posts

I read the help and I read many threads before posting so I think this response will ultimately help future users if they can ignore the attitude. 

But - for those of you out there just trying to get a handle on Revit -let me re-explain what I learned today despite the meanness of the responder:

It is possible to change the reference plane of a spot elevation from the default base of "current level" to any level you have created BUT

1.  If the spot elevation parameter called "elevation origin" is either "shared" or "project", you need to change it to "relative".

2.  There is a constraint parameter called "relative base" that will look like it is greyed out until you hit the OK button.  (Not just the "Apply" button.)

3.  AFTER you hit OK, you can change that parameter for "relative base".

It is the hitting of the OK button that is critical to the process, otherwise you will just think you have done nothing.

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WWHub

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Joined: Tue, May 16, 2006
13079 Posts

Glad to see you finally tried it.  You will find that hands on experience will get you farther than hand holding.

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caroUK

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Joined: Tue, Oct 28, 2008
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 @ndb110  Your explanation helped me 'make it work' THANK YOU!

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