Revit :: Calculated Wall Type U-Value?
Dec 18, 2013
We usually run our own calculations for U Values using the BRE Calculator (UK Building Research Establishment).
I just carried out an experiment to check the value that appears in the Revit properties of a wall type (Heat Transfer Coefficient - U) for a given wall build up.
The result in Revit does not seem to correlate with the value that our calculator generates.
I have checked through the conductivity values for the materials (under thermal properties) - and using the exact same values the Revit generated figure is far more optimistic.
For a typical cavity wall construction:
Brick (102mm) @ 0.54 W/mK
Cavity/air gap (40mm)
Insulation (60mm) @ 0.020 W/mK
Block CME (100mm) @ 0.51 W/mK
Plaster (12..5mm) @ 0.51 W/mK
The value that appears in the Wall Properties Dialogue box (greyed out - so I assume it is a calculated value) is 0.1935 W/m2K
Our BRE calculation generates a figure of 0.268 W/m2K.
The insulation manufacturer claims around 0.25 W/m2K for the given wall build up.
how we could have such a discrepency ? All the conductivity values are correct for the materials used in the wall build up.
I am beginning to wonder whethe the value in the Wall Type isn't a U-Value, although the units are consistent with it (W/m2K)
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Apr 12, 2012
Any way to get a wall sweep that's set up in the type/structure properties to follow a wall if that walls profile has changed. For example, in the image below, I've split the wall and adjusted it's profile to create some cheesy angled parapet. How do i get my wall cap to follow along? I thought splitting it and changing it's height would work, but no. And if I change the profile without splitting the wall the wall cap just runs right through the wall, as if the profiel was never even changed.
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Oct 31, 2013
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Jun 8, 2010
I am trying to make a schedule and I need to schedule walls, and filter by type. But this option is not available in the view properites/filter options in the schedule.
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Dec 13, 2010
Is there a simple way to change a wall type without deleting the wall and redrawing it in the new style?any time i change the wall type it changes all walls?
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Jul 11, 2012
In the properties drop down list for wall type selection, most of the different wall type are not showing. Also my elevation carmera is not showing when i click on a new drawing. In a previous drawing all walls selection type is there and the elevation camera. Only when i start a new drawing when wall type and elevation camera is missing. I check the interface to make sure the boxes are check.
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Oct 6, 2011
I am having a problem with creating a curtain wall system. After selecting my mass surfaces and choosing "create system" I am unable to change the type of curtain wall system. It just comes up with a regular grid system on the mass, where as before I was able to choose triangles, rhomboids etc under the properties tab. Now however I see nothing except for the current curtain system and recently used files.
I have also created a custom panel which I want to insert into my project but am unable to do so? I have tried loading it into the project, however because of the above problem I am not able to change it to my custom panel system.
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Jan 3, 2012
What kind of an instance paramater needs to be implemented in order to account the host wall type in the door schedule?
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Aug 28, 2013
I'm trying to input the price for the number of fixtures in my schedule. I added "count" in the fields. However, when I try to create a calculated value, I dont see "count" to be inputted into the formula. Why wouldnt "count" be listed for the formula??
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Dec 13, 2013
I created calculated value Plot Ratio (Gross Floor Area/Site Area = Plot Ratio) but it come out result is "0". Any reason why it didnt calculted properly or what is the correct formula to achieve the coreect answers?
Please see Attached.
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Oct 25, 2012
Material takeoff: As paint and other related calculations
I’m wondering why no values where calculated for the field “Material: as paint”! As for the “area” and “volume” calculation, they sound to be false, for example, the area of plaster board should be 0.02*1.84 but not 0.32*1.84! What might be false there?
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Jul 25, 2013
I have to draw a bulkhead wall that connects to a full height wall and a gyp bd ceiling. This causes the entire end of the full height wall to skew in line with the butt joint above the ceiling level. I tried Wall Joins but all the options screw up the bottom half of the wall which needs to remain in line with the paired opposite. I also tried editing the sketch of the wall profile but Revit couldn't keep the elements joined. I tried trimming the two walls back together afterwards but the wall profile dominates and prevents a clean join above the ceiling.
Surely there's a way to have different kinds of joins at different heights?
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Dec 4, 2012
I am trying to align the curtain wall with the edge of the concrete slab/face of wood framed wall (Core). I have tried to align and move however the whole wall moves as well as the edge of the slab. How I can move the Curtain wall leaving the other elements in place?
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Nov 27, 2011
Refer to the attached file. How can I cut the RED part of the Wall 1 (W1) , where Wall 2 is sloped. I also want to cut a hole in wall 2 (W2) by the BLUE rectangle , but why I can't do that .
I also want to add a second floor to my project but I can only see the" Level" icon goes grey and I can't click it.
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Apr 16, 2013
I am trying to make a floorplan of my house in Revit 2013, but I am having an issue when it comes to one wall in my house. I have an opening in the Master Bedroom that leads to the bathroom. This wall has a weird arched-like opening in it and I have no clue how to make this in Revit. I have attached a sketch.
Also, my exterior walls are 7' tall but the interior walls start at 7' and go up to 8' once in the middle of the house and reduce back to 7". How does one set that up in Revit?
EDIT: May have made the image too small to see, but the top is not arched, it is actually half of a decagon.
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Jul 29, 2011
I have a question about wall profiles. I want to make a profile on a wall so I can make Zinc Panels on the wall that are 10" X 20". I've attached a picture of what I'm going for. I'd like it to have a 1/2" spacing between them and with a joint depth of 1" and I'd like to do this is the wall type so that I can use this wall in multiple places rather than having it model-in-place. Anyway I have made a profile that is 1" X 10" so that it can become my panel profile. But when I go to add it to the wall as a wall sweep as I have seen people do I get hung up on how to make it tile up the wall and also I don't understand how to make the profile so that it is 20" wide. I have a screen shot of where I'm editing this too. Below is the link of the site.
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Apr 7, 2013
“Drag wall end” to the edge of the wall (indicated),In the attached screenshot, I wanted to drag the end of the temporary dimension from its location to the end edge of the wall but sounds not to respond!
How this temporary dimension can be dragged to the edge of the wall?
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Mar 30, 2012
My boss wants me to make the most outside line of a walltype to be the heaviest pen. If I go to the properties of the wall and changethe boundary it changes the boundary of the item in the wall, each boundary independentfrom the other. Such as a wall made of the following: BRICK, AIR SPACE, SHEATHING,STUD AND GYPSUM BOARD. In this wall theexterior face of the brick and gypsum board need to be heavy.
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Apr 1, 2006
I'm trying to make an effect I saw on a moive, the name of it is Holloweentown 2: revenge of kalibar. In that, there is a part where a boy's face is in a brick wall, you can see his face. How can i make that? The lines of the brick wall follow every curve of his face, its like 3d, I hope you understand what I mean. I tried that with the displace filter, it doesn't work that good. I can't find a pic of that anywhere either.
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Jun 20, 2012
Since yesterday, when I try to draw any of our custom wall types all I get is a standard wall type image (rectangle only). None of the detail or component colors are displayed. When I start creating the new wall, the detail displays until I click at the end of the wall, then the detail disappears. When I ID an existing wall and a newly created rectangle the properties all match. I can copy and mirror existing wall and the correct display is retained. All of the existing walls in the drawing display and print correctly. The newly created wall print only the rectangle. Medium detail settings are in place. This has to be a local setting problem on my computer because others in the office can draw the same new wall in the same drawing and get all of the detail.
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Jan 17, 2012
I can't seem to find a wall type that has the batt insulation in the middle (you know, the squiggle line representing insulation).
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Oct 24, 2013
I'm trying to make walls that are not just the Standard type (Brick -4 Brick -4 Furring for example) but when I make a wall of this type, it displays as a simple rectangle, instead of with the unique hatch patterns of that wall type...In the properties palette, the wall type is Standard, even though I've chosen a more specific wall type. How do I make walls that aren't Standard?
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Apr 4, 2013
Is there anyway no wall gap line between floor when I copy 1st floor walls to 2nd floor. Not to use "Join geometry" & Line work: invisible line" tools? See attached picture.
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Dec 12, 2013
Short story is I made a wall sconce from scratch but I can't see the symbolic lines in my ceiling plan in the project.
I needed a linear wall sconce for a client presentation based on one of theirs already installed. The manufacturer doesn't provide BIM for this model so I had make my own. I haven't bothered with photometrics. At this point all I need is a placeholder for the ceiling plan and a 3D model for a hidden line view. I used the wall based light fixture family. There was a plane elevation but no apparent parameter so created one and called it 'mounting height'. After about ten minutes of modeling (and over an hour of tedious aligning, dimensioning and locking of the sketches to keep the model from distorting with changes in wall thickness) I opened the ceiling reference level plan and drew some symbolic lines to represent the fixture on the ceiling plan in my project.
Here's what happened.
The symbolic lines for the CPRL (Ceiling plan in the family editor) are also visible in the FPRL. I don't know why this is and there doesn't appear to be a way to hide them in just one plan. I suspect it's because both are at the same height (the reference level.) I tried changing the working plane before drawing the symbol lines to another plane above the reference level and out of its view range but it had no effect. I can still see them in the floor plan.When I loaded it into the project nothing appeared and I got the message about 'no elements are visible because yada yada'. The symbolic lines didn't show up at all. I checked the detail level and that wasn't it. As far as I can tell the view range for the CPRL and the RCP in my project are the same. They don't show up in the project floor plan either. The sconce is visible in 3D views so it's definitely in there. I tried monkeying with the height of the symbolic lines like I stated in part 1. but it had no effect on there visibility. Symbol lines are visible in other families so it can't be an issue with visibility overides.In my project I noticed there's a parameter for the fixture called 'Elevation'. Changing it moved the fixture up and down on the wall. Changing the 'mounting height' parameter in the project had no effect! This parameter worked fine in the family editor. Playing with the 'Elevation' parameter and the cut plane elevation brought the symbolic lines into view. Apparently the symbolic lines are only visible when the cut line is passing through the sconce. Unfortunately my sconce needs to be mounted at 6 ft and my cut plane is at 7'2 to avoid cutting doors and windows. How do get these symbolic lines to display?
AutoCAD 2010
AutoCAD LT 2013
Revit Architecture LT 2013
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Jun 8, 2012
I want to turn off a metal stud wall but leave visible the pre-cast wall.
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Nov 20, 2006
revit should give a sub category for wall so it easy to on and off using visibility and give different line color in the object style
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Feb 17, 2013
In any event, how do does one use the numerical offset to offset an exterior wall and achieve the new offset wall to be in the correct orientation and location, i.e. exterior brick on the exterior and interior gypsum board on the interior?
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Oct 24, 2013
I need to model a wavy wall in Revit. See attached.
Revit 2014
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Dec 21, 2012
Is there a way to slope the bottom of the wall. See attached x sec.
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Mar 26, 2013
I am trying to create wall by faces of a Mass I modelled.
This is the Mass: [URL]
Everytime I try to create a wall by face of one exactly face, it accept Location Line: By Finish Face Interior only, when I try to change ANY other Location Line, it gives me a message error.
[URL]
And it is always from the SAME FACE highlighted at the picture.
The mass was made by the floors and top edges. I select all of the edges and create a mass from down to top.
All the other faces are ok and they accept the wall by face and let them change the Location Line except this one.
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Dec 2, 2013
how to have different colors for different wall faces? Like all have a plaster finish on the external side, but the colors are different, but when I try to change the color of the external finish, it changes it for all the walls.
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