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Thread: How to a material weight parameter to a Piece Tag

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    Angry How to a material weight parameter to a Piece Tag

    Hello,

    This is my first post to this forum. I just started using revit about a month ago and am in need of help with a specific issue.

    I've been able to figure out a lot on my own through watching youtube videos and reading. However, there is one thing that I have been unable to figure out. And that is how to create a piece mark tag that not only tells you the mark number, but also applies the material weight to it. I've been able to create a material takeoff schedule where I've created a formula that multiplies the volume by the pounds per cubic foot, divided by 2000 to get the weight in tons. But now I'm wondering if it is at all possible to link that field from the material takeoff schedule that tells me the weight to the piece mark tag I've created? I feel like there should be a way to do this. Maybe I'm going about it all wrong. Any help would be greatly appreciated.

    Thanks!

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    Member duende123's Avatar
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    You need to create a parameter for the weight inside the family.
    That parameter must be a shared-parameter to be able to use it in the tag
    You must assign to that parameter the formula to calculate it from the volume
    You must create a tag with that shared-parameter

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    Quote Originally Posted by duende123 View Post
    You need to create a parameter for the weight inside the family.
    That parameter must be a shared-parameter to be able to use it in the tag
    You must assign to that parameter the formula to calculate it from the volume
    You must create a tag with that shared-parameter
    Thanks for your reply. So did exactly what you said and it worked. The problem I'm running into now is that the family I need to calculate the weight for is comprised of 2 different types of materials (concrete and insulation). We typically don't account for the insulation since it doesn't really weigh much. Is there a way that you can think of that will only calculate the weight of the piece based on the volume of the concrete alone? Thanks again.

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    Member duende123's Avatar
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    How are you calculating the volume?
    what kind of family is it?
    Last edited by duende123; September 24th, 2020 at 02:35 PM.

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    The family is a piece mark tag for precast concrete. It contains a label for the Mark number and a label for the piece weight.

    The volume is a shared parameter and is derived from the model of each piece, so I'm not calculating it. My formula for the weight in tons is volume*4185/2000. The unit for volume is set to cubic yards, since that's what we work with. The weight of concrete is 4,185 pounds per cubic yard. My problem is that the formula I've created is applying the 4,185 pounds per cubic yard to the volume of the rigid insulation as well as the concrete, which gives me a heavier/incorrect weight.

    Is there a way to exclude the volume of the insulation from my formula somehow? Like could you somehow give the insulation a zero value for volume? The only way I can think to solve this is to just get rid of the insulation out of each piece all together. But that would just leave an empty space in the middle of the wall panel, and I can't have that.

    Quote Originally Posted by duende123 View Post
    How are you calculating the volume?
    what kind of family is it?

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    Hi,
    Instead of one combined foundation family, I would make two: a concrete foundation without insulation and a separate insulation. Then there will be no problems with tags, schedules and filters. Combine them later into an assembly if necessary.
    Another option is Dynamo, of course, but this is not for beginners IMHO.
    Last edited by Nurlan; September 25th, 2020 at 07:35 AM. Reason: ps

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    That's kind of how I was thinking about it. But that is going to take a lot of rework to achieve this, which is what I was trying to avoid. Luckily, my job right now is to learn Revit. So I have time to work through all of these things. Thanks for your reply.

    Quote Originally Posted by Nurlan View Post
    Hi,
    Instead of one combined foundation family, I would make two: a concrete foundation without insulation and a separate insulation. Then there will be no problems with tags, schedules and filters. Combine them later into an assembly if necessary.
    Another option is Dynamo, of course, but this is not for beginners IMHO.

  8. #8
    Member duende123's Avatar
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    You need to calculate the volume of insulation to subtract it from that of concrete.
    so you could calculate the correct weight.
    That must be done within the family.

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