Problems making the deck framing square
Hello to all! Having some problems making the deck framing square.
Just completed the frame on my deck which is 8 x 24. Haven't attached it to the beam yet and will once it is square. In measuring diagonally both measurements are 303-1/2" but when measuring from left to right the front and rear measurements are off by 2-1/4". The rear measurement from left to right is 286-1/2" and the front is 288-11/16". My brain is telling me that this is not possible. Anyone have an idea what I'm doing wrong?
Geometry does not lie. Your deck frame is not square. If it were truly square your diagonal or hypotenuse would be 303-9/16" (25'-3 9/16") and simultaneously your lengths, front and back would be 288" (24'). However since the back and front lengths are off by 2-1/4" you know for sure the corners are no longer 90 degrees.
Think of it this way. You can still have your diagonals equal in length and yet not be square. This would result in a quadrilateral but not a rectangle. Measure the length of the two shorter sides and and then compare them with your two longer lengths. You probably have four unique measurements.