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Wed, Aug 20, 2008 at 9:27:45 AM | wall area

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JonasN


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I have a contractor who disagree with the wall area in schedules. How do Revit calculate the area? Is it in the middle of the wall, inside or outside? If the wall is thick the difference can be quite large. Does it exclude windows and other objects in the wall or not?

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Wed, Aug 20, 2008 at 10:34:21 AM | wall area

#2

Typhoon


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The wall area it's calculate by the FACE of the wall, if you have a wall with 10 meters long x 5 meters height=50 meters², so, it's not matter if is in middle, inside or outside, and YES in shedules revit exclude windows, doors and openings... WE ARE TALKING ABOUT AREA NOT VOLUME...

 


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Wed, Aug 20, 2008 at 11:38:46 AM | wall area

#3

JonasN


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Ok, but if there are corners. If I have a ordinary house with 4 thick walls then the inner and outer area can differ a lot.

For example: A house that is 10x10 m with walls that are 2,5 m high and 0,5 m thick. The difference between the inner area and the outer is 10 m2 


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Wed, Aug 20, 2008 at 12:15:28 PM | wall area

#4

WWHub


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Why don't you do a simple test and post it here.  Just a box with a door and window all of know sizes?

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Wed, Aug 20, 2008 at 12:57:34 PM | wall area

#5

JonasN


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said and done. the walls in the example above is 95 m2. Revit seems to calculate the area from the middle of the walls regardless of the wall thickness.

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Wed, Aug 20, 2008 at 2:19:52 PM | wall area

#6

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"the walls in the example above is 95 m2. Revit seems to calculate the area from the middle of the walls regardless of the wall thickness." - you don't put the example but i know what you mean, if you have a house with 10x10x2.5m height (and 0.50m tick.)= 100m² but in this case the value he post is 95m², this area are by the middle of the wall, YOU HAVE A POINT. I create a shedule with this and the values he report are: 4 walls with the lenght 9.50m and 0.50m width, and each area 1-4 is 25.00, 23.75, 23.75 and 22.50m² = 95.00m², so Revit is calculate by the middle of the wall...

 


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Wed, Aug 20, 2008 at 2:33:07 PM | wall area

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It's like "he" calculate the Media of the areas (Exterior and interior) by exterior 10x10x2.5m= 100.00m², by interior 9x9x2.5m= 90.00m² so 100+90=190.00m² / 2 = 95.00m² because he calculates by the middle of the walls....

 

 



Edited on: Wed, Aug 20, 2008 at 9:43:25 AM

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Wed, Aug 20, 2008 at 7:06:16 PM | wall area

#8

JonasN


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thanks

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Wed, Aug 20, 2008 at 7:23:11 PM | wall area

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You Welcome....

 


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Tue, Nov 4, 2008 at 6:28:29 PM | wall area

#10

Warchitect


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THere is no answer to the question....plus the english stinks.

 

HOW DO YOU GET THE CALCULATION TO BE AT THE EXTERIOR OF THE WALLS??? a 10'x10' house is 100s.f. not 95 or something!!!

there is no option for this under area schemes.

 

Michael


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Thu, Jun 4, 2015 at 4:40:28 PM | wall area

#11

AnaVg


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 I am in sort of the same issue as Michael, but with interior walls' faces. My ideal answer would involve being able to quantify the face area of the walls by room.

 

 I know that by putting a room in there I can get the perimeter area, which I could then multiply by the wall's height. But the issue here is that some walls do not lie on the perimeter: they are standing apart inside the room, and thus are not being considered in the room's area/perimeter. Also, some walls have different height, so this multiplication of height x perimeter would be inadequate. 

 

 If anyone knows a way through the first idea, it would be great for you to share it! If not, every suggestion is welcomed. Right now, I've made a list of the rooms and filling it up myself in this format:

 

ROOM - NORTH WALL AREA TYPE 1 - NTH WALL A. T.2 (in case there is a different type of finish) - same for E, S, & W sides.

 

Thank you!

 

AE



Edited on: Thu, Jun 4, 2015 at 11:41:07 AM

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Thu, Jun 4, 2015 at 7:46:43 PM | wall area

#12

WWHub


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Material areas are taken off at the center of the material.  Wall areas are taken off at the center of the walls. How the walls are joined (miter / butt) will/can affect this.  Experiment with a box 10x10 (center of wall) x 10' high with a material take off and a wall takeoff and learn how all of this works.

 

Revit has never been good at taking off walls by rooms because the walls typically span beyond the room limits.  Change of height is even a more complex issue.   Obviously if you model anything, the elements will not typically associate with rooms and no way they will know if they are NSE or W! 

 

You can get close by using thin walls aligned to the inside face of your room walls.  We use this for tile bathroom walls.  We drop a wall group shaped as a box in the middle of the room, explode the group then align the thin wall to the wall faces.  If this thin wall has a material you can isolate in a material schedule, you can get your wall face areas pretty quickly but you might have to add a paramter for room # and wall direction to see it all in a material takeoff.

 

Good Luck!

 

 


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Thu, Jun 4, 2015 at 10:00:11 PM | wall area

#13

AnaVg


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Thank you WWHub! I tried what you say, but I believe it'll be excellent once I model all the materials with the correct thicknesses.

Thanks!

 

AE


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