Hi Everyone,

I’m new to SketchUp and working on my first floor plan. The height of my floor plan should be 30’, and it measures correctly when I check the entire wall. However, when I measure the distances between the walls and windows, the lengths don’t add up to 30’. I’ve tried changing the precision and toggling length snapping on and off, but the issue persists. What am I doing wrong? Any help would be greatly appreciated.

Can you ost your model for us to get a look ?

Hi Jean

Thank you for your reply, Please see attracted

Floor Plan-7-21.skp (1.3 MB)

file

When I change length units to decimal inches and precision to maximal (0.00000") and add up all lengths I get 360" which is what you wanted, 30’

Likewise, though some of the wall lengths are a bit strange:

(Note: The Ruby console scrolled left and hid the leading 1 on 170.92. But, values adding up to 335.99999999999994 is an expected consequence of decimal values in finite computer arithmetic - it is the same as 336.0 for all practical purposes).

Could this be caused by some of the 2D models I used or created?

I ended up adjusting the precision in Layout between 1/8" and 1/4" to achieve the correct length.

my Original Floor plan was measuring correctly, then I applied few changes and since then the measurements got messed up.

Yes and some wall thickness are also a bit strange. In north America I often see inner walls made of 2 x 4 which are really 1.5 x 3.5 inches. Add two layers of 1/2 inch sheet rock to get a total of 4.5 inches. Unless you prefer to use 2 x 6 (1.5 x 5.5), for pocket door (maybe). In such a case you get a total of 6.5 inches for the wall thickness.

The wall thickness are per the brief provided by the institute. They wanted exterior walls to be 12" and internal walls 7.9", except for the wall supporting the stairs to be 3.5"