Tuesday, 17 January 2012

Navisworks and Revit Quantities

I was fiddling around with parts the other day when I noticed the following.

There seem to be a difference in quantities between what Revit says and what Navisworks says. Here you'll see a screencapture of a revit wall that has been split up in revit parts and the same wall in Navisworks. Looking at the properties in both program of the same wall I can't help but wonder.

Revit says:

Dimensions
Volume       1.408 m³
Area  14.080 m²
Length  3520.0
Thickness  100.0
Height  4000.0

Navisworks Says:
Volume     0,040 m³
Area         1,308 m²

Length 3,520 m

Height        4,000 m
Thickness 0,100 m



I think the properties should be:

Volume     4000mm*3520mm*100mm = 1.408m³
Area         4000mm*3520mm = 14,08m²
Length      3520 mm

Height      4000 mm
Thickness 100 mm


Of course the area to be calculated is debatable because I only calculate one surface of the wall. There are ofcourse 6 surfaces.

Knowing that Revit actually works in the inferior system (oops typo I meant imperial) Let's see what happens if I tell Navisworks that the file I appended should be regarded in meters.

Take a look at the properties in Navisworks now.
Now Navisworks says:
Volume 1,408 m³
Area 14,080 m²
Length 11,549 m
Height 13,123 m
Thickness 0,328 m
The length, the height and thickness are crap of course but take a look at the volume and area...

PLEASE AUTODESK THE MAJORITY OF YOUR CUSTOMERS DO NOT USE THE IMPERIAL SYSTEM!!! FIX THIS IN REVIT!!!

An Autodesk employee told me that because of the time to market during development of the first version of revit that they had choosen the imperial system. Please you have had enough time by now to fix this.

Update
it's fixable if you change the export options. But still, it's awkward

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