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Hi- I have an area 24' x 42'. I put up my batter boards & ran my string lines. I'm exactly 24' x 42' outside corner of post to outside corner.

When I measure my diagonal I get 48' - 1"inch. When I cross over to measure the opposite diagonal I get 48' 8" inches. No matter how I try I can't get rid of those extra 7 inches. I know this should be an easy fix by moving my string lines in or out, but I can't get it to work. I know the
3 x 4 x5 triangle rule, but its really difficult to do accurately along a string line & it may also be too small an are for a 24' x 42' rectangular space. Can someone give me a simple explanation & fix. Thank you for the help.

#### Bondo

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I know the
3 x 4 x5 triangle rule,
Ayuh,... I believe it'll work the same at 6 x 8 x 10,....

Put marks on yer strings with a sharpie to make it abit easier,....

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Ayuh,... I believe it'll work the same at 6 x 8 x 10,....

Put marks on yer strings with a sharpie to make it abit easier,....
Bondo Thanks. I've done the 6-8-10 thing. It comes up giving me a 90 degree corner, but my diagonal measure is out by about 7 inches. The square root of my area is 48 feet 1 inch (rounded up from .375 inch). So when I measure my diagonals, one measures bang on at 48"-1 inch. When I measure the opposite diagonal I'm like 48 feet 7 inches. I'm a whopping 6 inches out of square. But when I go to adjust my string lines I'm affecting my 44 x 24 foot area.

I assume one of my long lines is not parallel to its twin. I understand my problem, but I'm lost on how you fix it. Thanks!

#### Gary in WA

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Should read; 48'-4,1/2" Keep which side you want straight to building/property/etc., adjust the other. Be sure the measurements of length are correct, you gave different ones in previous post...

Gary

#### ChuckTin

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If your diagonals are not equal (to within 1/4"?) you have a trapezoid not a square or a rectangle.
Decide which dimension is your base (as is suggsted by Gary), use 3-4-5 to establish a long leg at 90* to the base, mark your first corner, then adjust your corners right (shorter diagonal) or left (longer diagonal).
Sounds like you'll be doing both.
If you're really picky (like me!) you'll also look to see that your string is tensioned equally when you're measuring the diagonals because the cantery (sag) of the measurements is a lot more than most people appreciate.
Also if you're working on a slope you may need some savy to adjust for the slope as well.

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