HI and a question
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mac1:
If you can point me where to post the skp to, I will.
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From another thread.
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OK...
Since we don't have any 'original' dimensions how might we know the 'errors'?
I have marked where you assume a paper thin wall, that will have a real thickness...
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I am almost certain that no-one but you know what these dimensions should be. I suggest to start adding real dimensions to your floorplan and somewhere you will find the mistake. You can snap dimensions to anywhere: endpoints, midpoints, intersections (with guides for instance) to be precise. Somehow like this (I converted all dimensions to simple inches as my brain cannot work with feet & inches)
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Tig,
Yes, there are lot of walls which are between 8 and 16 inches thick in the building.
The two lines in the centre are the entrance hallway (5'). The building is to the inch.
The 'square' is divided in two down the middle with a 6" wall. At the rear are two 42" windows, framed with 6" frames - exactly in the middle of the building opposite the front door (which is two 2.5' doors).
The rear walls join to the extension of the box at precisely 31' 10".
At each corner (on the rear of the square) it is 103 inches to the window frames.
The actual measurement is 103-6-42-6-42-6-103
You will see that the rear walls align with the front walls with an offset - this is correct - and you will see it is symmetrical as you would expect.
If I draw to here, and do not insert the 'square' - the whole building is perfectly OK - but the measurements I have taken (most recently a recheck on friday) doesn't align the 'box'.
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I could not help wondering what side of the walls were being measured. I drew in some walls-- arbitrarily in hopes of finding the discrepancy in a way that would be favorable (I made a further guess and extended the alcoves each side of the central square), but perhaps not enough length. So that's the question I'd have: If you draw in the walls, even temporarily, which sides of the measurement are they?
Sometimes in measuring a building we measure wall thicknesses at doorways. In conventional homes, to save time, I usually just assign the standard wall thickness when drafting, knowing that I want a "square" plan that ignores those as-built discrepancies that would be insignificant to the builders--then I might check it further against overall measurements. Either way, I draw the wall space into my site sketch. These things can be vexing, back at the office.
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dom86;
One other thought. You are measuring an imperfect building and then modeling it perfectly. I have not done any analysis ,but form my intuitive thinking the wall thickness may not account for such a large error. The thought is a small racking of the building can give large errors over the long distances you are dealing with. If you have any chance it may help to measure some diagonals to get some idea how square the building is. I don't think you want to model on that basis but could help understand the issue. -
Guys
Thanks. I will pop another file up soon. I have discovered that what it seems to be is that the measurement on the front is off.
The two extensions off the main block at the front actually sit over part of the main building: this is the same on both sides - since I have measured outside only this is where the gap (seems) to be coming from - I will draw up an example
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OK: I think this is where the problem is: I have 'counted' the distance around the wall (highlighted in yellow) - but as they are effectively bits that are 'added on' they are not part of the building itself, and what's more some measuring matches the discrepancy to the inch....
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Some thoughts for you. Aligned square and front entrance per your 2 26 616am post and added double jack studs and trimmers for the two window case.
Just some thoughts.
u001_mac1B.skpdom86 -
Mac1
Thanks. I've had a look, my skp was not marked correctly from the window aspect.
I am now working an a new plan, but without side extrusions, it should look a little more accurate
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