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Thread: Interior / exterior / foundation / retaining / soffit / core-shaft

  1. #1
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    Interior / exterior / foundation / retaining / soffit / core-shaft

    Hello again forum

    As the title says, i have some questions about the type properties of the walls that one have to change if the wall is interior, exterior, retaining, etc.
    In advance, many thanks for your help, I really REALLY apreciate it, you are great!

    Interior / exterior / foundation / retaining / soffit / core-shaft-interior-exterior-foundation-etc.jpg

    1. Do I have to select each wall and choose one of that options?
    2. For what is good that? Only for filters? isnt it better that those options be as an "instance" options and dont a "type" option?
    3. When do I have to use it and when not?
    4. Please explain me what is a CORE SHAFT WALL??? are they the structural walls of the elevators?? (I am an architect from Per˙, so here is other language, but the translator cant explain me what is a core shaft wall)
    5. When do I have to use the wall type propertie foundation wall?? isn't better to use the "structural foundation wall" buton?

    and for last

    6. the instance property "structural usage", is that really necesary to use? or only for analityc use?

    Interior / exterior / foundation / retaining / soffit / core-shaft-bearing-shear-structural-combined.jpg


    I know that are a lot of questions... so I will be really gratefull.

  2. #2
    Senior Member rkitect's Avatar
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    1. No, this is a type property, so all instances of this wall type will retain that "function"
    2. Filters, schedules, anything the information can be used in. Also, when exporting to gbXML the different functions produce different results. So if you don't want to be thought of as silly 40 years down the road when an intern architect has to export your as-built model for some renovations and needs a gbXML file, then you want to set these correct.
    3. Always. >_>
    4. My understanding with my wee non graduate brain is that core shaft walls are constructed differently from partition walls due to the nature of needing to be able to sheath the side of the wall that is in a shaft opening. This would be difficult to do in a 10 story elevator shaft. See if this document helps any (sorry it's in engrish) http://www.usg.com/rc/system-catalog...g-en-SA926.pdf
    5. Foundation walls behave differently with their top and bottom constraints from non foundation wall types. They rely on depth, instead of height. The only difference between using the wall tool and the structural wall tool is that by default when you place a foundation wall with the structural wall tool, the "Enable Analytical Model" is checked. (correct me if I'm wrong)
    6. See above. This parameter is set by default to Non-bearing when you use the architectural wall tool, and to Bearing by default when you use the structural wall tool.. well, that's not technically correct. Technically it is set to the default structural usage value, which I believe is defined somewhere in the structural settings in Revit.

    Hope that clears some things up.
    Last edited by rkitect; May 22nd, 2013 at 08:50 PM.

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    Thanks Revittotd that have been very helpfull

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    Moderator cellophane's Avatar
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    Quote Originally Posted by revittotd View Post
    4. My understanding with my wee non graduate brain is that core shaft walls are constructed differently from partition walls due to the nature of needing to be able to sheath the side of the wall that is in a shaft opening. This would be difficult to do in a 10 story elevator shaft. See if this document helps any (sorry it's in engrish) http://www.usg.com/rc/system-catalog...g-en-SA926.pdf
    I've always wondered why Revit called them Core Shaft Wall and not just Shaft Wall.

    But yes, shaft walls (trash chute, linen chute, HVAC chase) must have sheathing on both sides of the stud in order to be rated (UL U415 or similar.) I've not seen an elevator shaft constructed this way but we rarely work on buildings that are more than three or four stories (and use masonry more often than not.) The U415 mentioned above is a 1" shaft liner, a metal C-H stud and a 5/8" type X GWB and gives 1-4 hours of protection.

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    So the shaft wall is really a cover to protect from fire... uhmmm really revit was built for the USA construction system, here, the walls of the shafts are like any other wall, maked with masonry, so I asume I dont make them shaft walls

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    The Moderator with No Imagination MPwuzhere's Avatar
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    I'm not sure as I never have looked....but I wonder if a wall is selected as a core shaft it may show up differently on a MEP view? Kinda like a stud wall needs to be marked as structural to show on a Structural View...

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    Senior Member rkitect's Avatar
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    Maybe this will clear up what you are looking for:

    When you export analytical surfaces to gbXML, the Function type parameter affects walls, floors, and building pads as follows.

    Interior surfaces
    If its function is Interior or Core Shaft, a wall is displayed as an interior surface, regardless of the number of adjacent spaces.
    from: Function of Walls, Floors, and Building Pads - WikiHelp

  8. #8
    Autodesk TheViking's Avatar
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    The difference between the "Wall" tool and the "Structural Wall" tool is the Structural parameter value. It is set to checked when the Structural Wall tool is used. The analytical model is not required for a wall to be considered Structural.

    Erik

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