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Squareness Tolerances

The length and width of a sheet may measure correctly, but sometimes the sheet is not square.  A square sheet has perfect 90° angles in each of the four corners.  To check the squareness of a sheet without measuring the angles diagonal measurements can be used.  The amount a sheet is out of square is the difference between diagonal measurements divided by two.

Example: If one diagonal measures 84.75", and the other diagonal measures 84.50" then the sheet is said to be .125” out of square because (84.75-84.50)/2 = .125

Tolerance of resquared sheets and plate up to 72"

Thickness range Max Tolerance Out of Square Difference of Diagonal Measure
30 - 20 GA Shts. 1/32" 1/16"
19 - 16 GA Shts. 1/16" 1/8"
15 - 12 GA Shts. 3/32" 3/16"

Tolerance of resquared sheets and plate up to 120"

Thickness range Max Tolerance Out of Square Difference of Diagonal Measure
30 - 20 GA Shts. 1/16" 1/8"
19 - 16 GA Shts. 1/8" 1/4"
15 - 12 GA Shts. 3/16" 3/8"

Contact us for Perforated Sheets and Plates over 120"