Room Tag Width x Depth Parameters generating question mark

[rstewart]

At the following Revit support link there are instructions on how to use calculated values to set up the room tag to publish the calculated width and depth of a room based on the room's perimeter and area: Revit 2017: How to create Room tag including Width x Depth parameters.  However, if the room is square and has width and depth values in the range of 11'-11 7/8" x 11'-11 7/8" up to 12'-11 3/4" x 12'-11 3/4" it will generate a question mark.  Any suggestions on how to resolve this dilemma.  Thanks!

[jeromemaceachern3284]

Under your Manage tab, click on the project units button in the settings section. For the length, you can change the rounding there to whatever you'd like. 

[MarissafBB]

1) Under "Edit Label" click on the parameter 1 Length then at the bottom click the # with the finger pointing to it. If you hover over the button it says "edit the parameter's unit format." Click.

2) The next window says format. Uncheck the box "use project settings". Revise the rounding to be "To the nearest 1". Update the units to "Feet and fractional inches." Press Okay. 

3) Do the same thing for width parameter. 

Hope that helps. 

[jljonesGBHUC]

You can change the precision of the units by opening the "Edit Label" dialog in the tag family and changing the parameter's units ( attached image provided). Select the length parameter crated using the "Fx" button and then click the "Edit Parameter Units" button  at the bottom of the dialog. Repeat this step for the Width parameter. 

[solvdesigns]

I recognize that this is an old thread.  While searching for a better answer to the whole "room tag with length and width" quandary, I thought I would at least share the best solution I have come up with so far.  If anyone has a better solution I would love to hear it!

I am specifically responding to post #7 where a.crawford asks about tags using the formula from ToanDN always returning the smallest room dimension first thus resulting in tags that sometimes list the "length" first and sometimes list the "width" first.  (By the way, thank you ToanDN for adding the if statement to that formula to address square rooms!)

So far, my solution to a.crawford's question has been to create a tag with some overlapping labels that are turned on or off with visibility parameters.  All of these are in ONE tag family with multiple "types" inside of it.  I call the family "Room Tag - ALL"

First, I have a tag type called "RT Size H" with a label for horizontal rooms that uses the formula "Area / RmShort" as the first calculated formula to return a value I call "RmLong".  Then it uses the "if(Area = (Perimeter / 4) ^ 2, Perimeter / 4, ((Perimeter / 2) - sqrt((Perimeter / 2) ^ 2 - 4 * Area)) / 2)" formula for the second calculated parameter to return a value I call "RmShort".  The label for this "size" is turned on and off with a parameter I call "Show Size H".

Next I have a second tag type called "RT Size V" for vertical rooms with a second overlapping label where the same formulas are used but their order is reversed so that the short value is first and the long value is second.  That  label is turned on and off with a "Show Size V" visibility parameter.

That hopefully answers a.craford's question.  So far so good.

Here is where it gets a bit more messy.  There are obviously rooms that are not rectangular.  For those, I have additional overlapping labels (turned on and off by more visibility parameters) that allow me to show the room square footage or a manually entered width and length.  I have the manual labels in a different color until printing to remind me to make sure that it is up to date.  I may start using a schedulable bounding box something like ml offered in post #12 and a scheduled "Manual Size" parameter so that I can use a schedule to quickly check and update manual room sizes.

Ok, still not too messy (other than wishing there was a better way to avoid the manual sizes), but there is more...  You find that sometimes you only want the room name and no size, so I have a type for that scenario.  Then you find that sometimes the name is too wide and you need to have a name label that forces wrapping so I have a type for that.  Then you realize that you need the wrapping version for when the room size is shown for the horizontal rooms and the vertical rooms and for when square feet or a manual size are shown.  You guessed it... I have types for those too.  Then what if you need a name label in a smaller font for small rooms like closets?  Now you need a type for each variant with that smaller font.  Heaven forbid you also need smaller font that wraps...  Ridiculous!  I really wish Revit allowed a better way to control wrapping or allowed instance parameters (instead of just type parameters) for tags.  That would make for a LOT less tag types!

All of that is to say nothing of room tag types to show room numbers, or floor finishes, or ceiling heights!  Yep, I have visibility parameters and types for those too.  Anyone feeling over-TYPED yet?

Hopefully I at least offered a possible solution to getting tags to consistently show the room "width" first.

Anyone have a better solution to avoid all the tag types??  Please!!!

[ToanDN]

I would define L x W as the longer dimension x the shorter dimension of a rectangle. Why is it necessary to bring the orientation of the room on plan to the equation? What if the room rotated 45 degree? What if you look at the building from a view rotated 90 degree?

I have no solution for non-rectangular rooms, nor I think it is worth trying to make one. The dimensions of such rooms should be on the plan.

[kpBAI]

I followed all the steps for this procedure, including copying and pasting the formula.  However, I noticed only about half my rooms are displaying the correct dimensions.  If I click on one wall, and begin to nudge it in either direction, both dimensions are changing with each nudge, even though the room size is only changing in one direction.  

[RDAOU]

@kpBAI 

You shouldn't copy something if you are not certain what it does or where it came from lol

That formula ONLY works for Rectangular/Square shaped spaces. It does not work for trapezoidal/rhombus shaped or L Shaped rooms. When a Quadratic Equation is used on trapezoidal/rhombus shaped quadrilaterals it will return the dimensions of the Rectangle with the area equal to that of the Rhombus or Trapizoid.

For a reliable formula for quadrilaterals in general it should be based on BRETSCHNEIDER's equation and not the Quadratic Equation.

[adarshguptah199]

https://youtu.be/6Ay757asNCM                         VIDIOO ENOUGHH

[Seychellian]

This is great thanks. i complain a lot about Revit but this is where it really comes into its own. Does anyone know how you can schedule the Length and Width values in the main project?

[christine]

I know this is an old post, but has anyone else noticed that the formula doesn't seem to work when your room is bound by two different wall types? If so, any solutions for the issue? 

[BigPicture045]

Edit: Nevermind, I found that it indeed is only for rectangles. 

Does this Room Tag only work with perfect rectangles? 

You can see from the image below that Room #1 works with this tag whereas Room #2's dimensions are way off.

[Anonymous]

hello Sir ,Have you got Answer,i am Also facing same problem

[Anonymous]

Is there a way to limit dimensions to whole inches?

77' - 6" vs. 77' - 6 153/256"

[Anonymous]

any idea for a non rectangular room ?? 

[marksam97]

I have problem with this formula

if(Area = (Perimeter / 4) ^ 2, Perimeter / 4, ((Perimeter / 2) - sqrt((Perimeter / 2) ^ 2 - 4 * Area)) / 2)

It is not accurate as it shown in photos below 

so anyone have solution ? or why it is not accurate?

[Noe.Organista]

Edit Label
Select the Parameter
Edit parameter's units format (icon in between "Move parameter down" and "Edit calculated parameter")

[fireflyglowup]

Need to know this too!! Hoping someone answers, because you can't edit it afterwards. 😕

[sudarshan_biranje]

this only works for rectangular rooms it's not working for different shapes like L shape room or c shape room, where we need the longer length to display. is there way for that?

for example, see living room dimensions 

[ToanDN]

How do you determine width and length of non rectangular rooms and does it even make sense?

[nhingorany]

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