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Thread: Family elements as "Not a Reference"

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    Moderator DaveP's Avatar
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    Family elements as "Not a Reference"

    You know how you can set a Reference Plane to "Not a Reference"?
    I'd like to do the same to modeled elements inside a family.
    Here's my issue:
    Our Code guys want to make sure our Fire Extinguishers are no more than 75 feet apart.
    We can accomplish that by adding a thin extruded shape to the Extinguisher family on a sub-category that only shows on a Code Plan.

    My problem is that even though that sub-category is turned off on all other Views, Revit still sees those extents and wants to select the Extinguisher any time you click within that 75 foot space.
    So I want to make the family such that the extruded shape is not considered as part of the family for selection.
    I can't make it a Visibility parameter, because I want it ON for the Code plans, and off for all other Views.

    Here's the family. It's a prototype. More proof of concept than finished product.
    Attached Files Attached Files

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    Moderator DaveP's Avatar
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    Oh, and I've tried it with the 75' shape as a Generic Annotation, but I can't make the GA part transparent or "send to back", so it hides the rest of the model.
    Coarse/Medium/Fine doesn't affect it, either.
    Last edited by DaveP; February 19th, 2019 at 09:21 PM.

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    Forum Co-Founder Twiceroadsfool's Avatar
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    I havent opened the family, but im just taking a guess: I hope its not a 75' "circle" you are putting (trying to put) in the FEC. Any code reviewer that is willing to accept that, is not thinking rationally, or logically. Not unless people can walk through walls to get to those FEC's.

    I use Travel Distance Lines (whatever method you use for those) of a different Type, and i draw the path between FEC's. A radius is as if there are no walls in the building, which is just make believe.

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    Moderator DaveP's Avatar
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    Nope. Not a circle.
    It's a square.
    I'm probably explaining it badly, but this is a process that our main code guy has been using for years.
    He made a lunch presentation on it to the office a couple months ago, and I'm trying to make a Revit family that makes what he's already doing simpler.

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    Forum Addict GMcDowellJr's Avatar
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    Yeah, well, heís wrong. Doing it for years doesnít mean squat if itís wrong. But yeah, Iíve seen it that way as well and have gotten them all approved. Still wrong but whatever.

    To answer your question directly, no. If itís there, itís selectable. Use Dynamo to draw your whatever if thatís what youíre going to do.


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    Moderator cellophane's Avatar
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    The 75' value depends on the size & type of extinguisher as well

    https://community.nfpa.org/community...irecodefridays
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    Forum Addict GMcDowellJr's Avatar
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    Truth.


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    jmk
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    I have a detail line circle in my family to help me quickly eyeball initial placement. Since I only use it for a few minutes at a time, I have the diameter tied to a type y/n parameter that changes the radius from 75' (or as otherwise set) to a few inches. That pulls the perimeter back to the family object and prevents it from getting in the way.

    Have you tried using a nested, shared family, turned off with a filter? I had a completely different issue, where I needed to turn off a masking region that wasn't controlled by the subcategory, and found that turning off the shared family with a filter worked well.

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    Moderator DaveP's Avatar
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    That's why the 75 feet is a Type parameter. As I said, it's a prototype.
    I'm still waiting for him to reply with his actual logic, but as I remember his presentation from December, because it's a square, not a circle, the only way to get more than the required distance is if you have to go around multiple corners.
    And if he's wrong, he's been able to fool the Minnesota Code officials. He sis on the board that wrote the latest version.

    I just tried another method, and even Symbolic Lines force the entire thing to be selectable.
    I hate post-processing things because it relies on someone to DO the post-process, but it looks like having Dynamo create something View-dependent is going to be the only way.

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    Forum Co-Founder Twiceroadsfool's Avatar
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    To be clear, im not saying it wont "pass a code review" with the circles or the squares. Im saying if the intent of the *code* is "They shouldnt be more than 75 feet from one another" which can loosely be interpreted as "An occupant is always within 37.5 feet of a Fire extinguisher in an emergency," the simple fact remains that you cant walk through walls.

    I am all about that NOT being the correct interpretation of the 75' radius rule, though. Would love to hear his logic about circle/square and distance, though. Because (personally) i think its wrong.

    But you are quite right: My last company was submitting them for YEARS (and still might be) with the "big circles."

    Personally, id rather tell the client they need way more FEC's, then have to read in te paper someone died in a fire.
    GMcDowellJr likes this.

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