On 11/24/2014 11:58 AM, Larry Blanchard wrote:
On Sun, 23 Nov 2014 22:31:21 -0600, -MIKE- wrote:

A brand new square should be square.
I know how to check and adjust squares.
I do it when I drop one... not when I buy one. :-)

There's a tolerance on all squares. Greatest for a rafter square,
middling for a combination square, and minimal for an engineering square.

And an engineers square is square on both outside and inside.

And a good engineer helps those with the sloppy framing square to square
their square by punching the inside of the angle or the outside.
That makes the large framer calibrate outward and inward.

Martin