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OS doesn't assign construction to reversed surfaces

asked 2017-11-03 08:15:44 -0600

Dinosaver gravatar image

updated 2017-11-04 07:16:39 -0600

While OS imports gbXML files it creates 2 surfaces: an original from gbXML with assigned construction, and a reversed one as Energy Plus requires. To that reversed surface OS doesn't assign any construction, why? OS 2.3 So, here is the test file.

  1. OS does not recognize underground walls.
  2. In SketchUp there are no constructions assigned to generated reversed surfaces: image description

  3. Some of surfaces have constructions with unreadable names: image description

  4. In OS application horizontal surfaces are recognized incorrectly: image description

As you see, it doesn't assign all of them to floors or to ceilings, but do it randomly, so it is impossible to automate reassignment. 5. As a consequence, constructions for horizontal surfaces are also wrong: image description

  1. And the last but not least - adjacent spaces. Again, constructions to SOME reversed surfaces are not assigned: image description

  2. But if you check the same surface in its space, you'll see assigned construction in green and it is wrong: image description

Last time when we discussed here the problem with gbXML import, there was an opinion, that the file itself was exported incorrectly from Revit. But as I see now, the problem is actually in OS. @macumber, please respond to this post, as I remember OS announced a kind of certification in working with gbXML, may be I do smthg wrong..?

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answered 2017-11-03 13:35:24 -0600

@Dinosaver OpenStudio has logic to dynamically create reversed constructions for matched surfaces, or to apply existing construction if it is symmetrical. This works for when one construction is missing, but it an also override defaults. For example if you have a construction set for the entire building that has a default interior ceiling construction, and then you have an attic space with a custom attic floor construction; a reversed attic floor construction will be generated and applied to the ceiling of the space just below it.

Here is an example of what that looks like in the OS app. Note that after making changes to boundary conditions, you ma y have to leave and come back to this tab to see constructions update. The green color below is an indication of an inherited construction. This particular model has no construction set, so the plenum floor is inheriting from the matched surface.

image description

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Thank you for the respond, a detailed report about the issue is added to the original post.

Dinosaver gravatar imageDinosaver ( 2017-11-04 07:12:48 -0600 )edit

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Asked: 2017-11-03 08:15:44 -0600

Seen: 91 times

Last updated: Nov 04 '17