Announcement

Collapse
No announcement yet.

Vertical Ladder Help

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Vertical Ladder Help

    I need to place a vertical ladder into one of my projects. The ones that our clients use are slightly different than the ones "out of the box" in RVT. I was editing the family and I noticed that when you change the wall height, the ladder rungs keep the 1'-0" spacing. I would like to have the top rung equal to the top plane of the surface that I am going to access with the ladder, with all of the rungs being equally spaced from the floor to the platform I am accessing. The ladder that Revit uses spaces it out equally with the 1'-0" spacing being the reference dimension and the first step is the step and the last step is where it uses the extra space if my wall height isn't an even number.
    Any help on this would be greatly appreciated.

    TIA

    #2
    You will need to use a formula (probably 2) for the spacing. Something along these lines:

    Spacing: 12" (this is the array spacing value)
    Height: 10'-0" (height to top rung)
    SpacingMax: 12" (maximum spacing possible per code)
    SpacingControl: (this is the parameter you use for the array itself)

    SpacingControl = if(Spacing>SpacingMax,SpacingMax,Spacing) i.e. if Spacing is greater than the SpacingMax value, use SpacingMax, otherwise use Spacing

    disclaimer: I'm writing this solely from memory and don't have anything at hand to reference, there may be some errors :hide:
    Revit for newbies - A starting point for RFO


    chad
    BEER: Better, Efficient, Elegant, Repeatable.

    Comment


      #3
      Thanks for the help. I get an error saying inconsistent units. Do you think you missed something from memory??
      Also, will your formula keep the rungs from going above the top reference? That is another problem I am having.
      Bear with me....I am a little green on editing families.

      Comment


        #4
        Originally posted by mvnade21 View Post
        Thanks for the help. I get an error saying inconsistent units. Do you think you missed something from memory??
        Also, will your formula keep the rungs from going above the top reference? That is another problem I am having.
        Bear with me....I am a little green on editing families.
        I wouldn't doubt it :hide:

        When you create your array use the Last option instead of 2nd: https://www.screencast.com/t/ivzmlxGu This will create the array so it spaces between two points instead of at a fixed distance.

        Take a look at the attached family and see if that helps. The formulas can probably be streamlined but I think it will get you what you need.
        Attached Files
        Last edited by cellophane; July 11, 2017, 06:57 PM.
        Revit for newbies - A starting point for RFO


        chad
        BEER: Better, Efficient, Elegant, Repeatable.

        Comment


          #5
          Thanks for your help.
          Like I said, we as a company are starting with the whole BIM products and I am trying to set up our clients needs so it is easier to use rather than the "out of the box" stuff

          Comment


            #6
            Looking further into your family, what is the importance of the spacing control parameter? For how I see it, I really only need every rung from the floor to be equal. So, the RungArrayActual would be the TopRungHeight/RungSpacing.
            I also don't see the need for the BottomRung Parameter if this is the case. The BottomRung parameter should be the equal rung spacing from the rest of the array. I think the Array should start from the Floor to the top rung height.

            Am I way off track or did I lose you?

            Comment


              #7
              Originally posted by mvnade21 View Post
              Looking further into your family, what is the importance of the spacing control parameter? For how I see it, I really only need every rung from the floor to be equal. So, the RungArrayActual would be the TopRungHeight/RungSpacing.
              I also don't see the need for the BottomRung Parameter if this is the case. The BottomRung parameter should be the equal rung spacing from the rest of the array. I think the Array should start from the Floor to the top rung height.

              Am I way off track or did I lose you?
              I've found it easier to build the flexibility in early rather than try to retrofit. The RungSpacingControl is there to ensure that your spacing never goes above or below the requirements in your code. It is bordering on overlkill but if you know there are values that you can't go beyond it is easy to lock them in like that. I do the same thing with ADA clearances & accessories. The rung spacing off the floor can vary by need / code (OSHA & ANSI don't always align) so might as well add it in. If you wanted to you could use the RungSpacing parameter instead, it just removes some flexibility. I just looked at a manufacturer provided family (link below) and their entire array starts at the top run which is probably a better choice in this case since the top rung is required by code to be in-plane with the top surface of whatever the ladder is going to.

              The family I made was just a quick reference for concept. There are multiple ways to get to the end result and what I have might not be the best (it probably isn't )

              Manufacturers Fixed Ladders
              Revit for newbies - A starting point for RFO


              chad
              BEER: Better, Efficient, Elegant, Repeatable.

              Comment


                #8
                cellophane,
                I appreciate all your help you are giving me so far. I think I got the rung spacing where I want it now. I used your formulas as the Manufactured Fixed ladders were way to confusing to figure out.
                I cannot get the rails to align properly to the "floor" level. When I try to align the bottom and test the dimension, I get a whole bunch of alignment constraints errors. Can you try to see what I am missing? I attached the file to this post.
                TIA
                Attached Files

                Comment


                  #9
                  If I'm understanding your question correctly the fix is to change your sweep. Instead of the path being the thickness (SideRailThickness), have the path be the shape the rail follows, and the profile will be your steel shape. I personally would create the ladder so it goes up from the Ref Level instead of down but I can see an argument for the method you used as well.
                  Attached Files
                  Revit for newbies - A starting point for RFO


                  chad
                  BEER: Better, Efficient, Elegant, Repeatable.

                  Comment


                    #10
                    So,
                    I started to make my own rails for my ladder design and I still get the same error. I changed my sweep objects.
                    Attached is the new railing. I see you gave me your correct rail, but I would just like to know what I am doing wrong.
                    Thanks
                    Attached Files

                    Comment

                    Related Topics

                    Collapse

                    Working...
                    X