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16" layout when framing a wall(spaced every 16")
You give it a teddy bear
You could run the chalk snapline from corner to corner crossing in the middle and then taking the framing square to the center of the room. Lay the square with the point to the center of the intersection. If the room is square, the legs of the framing square should run down the chalk line evenly. The best best way to really know if the room is square is calculate the hypotenuse of the triangle. This is best done with a tape measure, however if we only have a framing square and a snapline this is what you can do: 1st we start at an inside corner. Using the ruler on the framing square measure along the wall to a distance of three feet. Make a mark. 2nd starting at the same corner measure out along the other wall to a distance of four feet. Make a mark. 3rd snap a line from each of your marks. At this point you should see a triangle that includes the corner that you measured from, the two walls that you measured along, and the snapped line that you just made. If that snapped line measures five feet, VIOLA! your room is square.
No, 325 is not a perfect square however 324 is a perfect square.
38 is not a perfect square. Its square root is a fraction and the square root of a perfect square is always an integer.