Forums >> General Discussion >> Revit Project Management >> Spotting "Negative Clashes"

amitdayan

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Joined: Tue, Dec 25, 2012
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Our buildings trend is to become more and more efficient. every cubic inch has it's cost and our owners are demanding the best use for these spaces. The "doorkeeper" in this battle is naturally the architect. Unfortunately for those architects, our buildings also become a puzzle of complex geometries then ever before. yet, requirements from the architect remains the same "control every cubic inch". During construction documentation it is accustomed that the architect checks and approves the structural engineer's drawing for correspondence with his design intent. Most relevant check would be to make sure that the framing and bearing components do NOT take any additional space which wasn't defined for that matter in the architect's design. fair to say those checkups are very time consuming and error prone. as both architectural and structural models are available - those checkups should get automated. all we are seeking for are "negative clashes", meaning volumes in the structural model which do not exist, or exceeding those in the architectural model. I've tried using Navisworks "compare" function for this purpose, though concluded it doesn't serve it well. Any sharing of previous experience or alternative practices would be appreciated.

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dgcad

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What about a regular Navisworks Clash run between the struct and Arch model setting the tolerance to '0' ?

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amitdayan

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in concrete construction you would get tons of clashes. they should be there as the structural engineer, for instance, would always place his shear walls right on the walls that appear on the architectural design.

architectural and structural columns would also "clash" that way.

what we are interested in are the spaces where those shear walls (modeled my the engineer) are exceeding the spaces defined for them in the architectural model.

automating this pretty simple check may save architects tramendous amount of working hours.

hope i'm clearer now..

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teafoe5

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There is no way that I am aware of to tell if your walls are taller/shorter than the architectural walls.

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changing the "family" and "type" names

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