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Squaring a foundation

#1
08-12-00, 07:51 PM
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How do you square up a foundation? We are building a garage that is to be 28'x 28'. According to calculations the diagonal measurement should by 39'6" or 39' 7". The diagonal measured from NW to SE corners is 39'6" but the measurement from NE to SW corners is 40'. What do we need to adjust to make both diagonal measurements the same?

#2
08-12-00, 08:39 PM
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First, measure each of the four sides. Are they all 28'-0"? If the NW to SE diagonal is the 39'-6" you calculated that it should be and the NE to SW is longer, I would say one of your walls (either the west or the south) is too long. Make sure you do all of your measuring with the SAME tape measure (they DO vary!!).

#3
08-13-00, 12:54 PM
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I hate to disagree with Lefty, but if your sides are the right length, then you just have them a little out of square. In geometry you would have a rhombus, and not a square. You simply slide one of the lines, either up or down until it is square. It is very easy to do, and should take about 5 minutes. This is very common. You should get it within 1/4", then you are ok.

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