Galvanized Sheet Thickness Tolerances

  Thickness in Inches Weight in pounds/square feet Thickness in millimeters
Gage Min. Max. Nom. Min. lb/sf Nom. lb/sf Max. lb/sf Nom kg/m(sq) Min. Max. Nom.
33 .0060 .0120 .0090 .2409 .376 .486   .1524 .3048 .2286
32 .0104 .0164 .0134 .4204 .563 .665   .2642 .4166 .3404
31 .0112 .0172 .0142 .4531 .594 .698   .2845 .4369 .3607
30 .0127 .0187 .0157 .5143 .656 .759 3.20 .3188 .4783 .3988
29 .0142 .020 .0172 .5755 .719 .820   .3569 .5169 .4369
28 .0157 .0217 .0187 .6367 .781 .881 3.81 .3950 .5550 .4750
27 .0172 .0232 .0202 .6979 .844 .943   .4331 .5931 .5131
26 .0187 .0247 .0217 .7591 .906 1.004 4.42 4712 .6312 .5512
25 .0217 .0287 .0247 .8407   1.167   .5274 .7274 .6274
24 .0236 .0316 .0276 .9590 1.156 1.285 5.64 .6010 .8010 .7010
23 .0266 .0346 .0306 1.0814   1.408   .6772 .8772 .7772
22 .0296 .0376 .0336 1.2038 1.406 1.530 6.86 .7534 .9534 .8534
21 .0326 .0406 .0366 1.3263   1.653   .8296 1.0296 .9296
20 .0356 .0436 .0396 1.4486 1.656 1.775 8.08 .906 1.106 1.006
19 .0406 .0506 .0456 1.6526   2.061   1.028 1.288 1.158
18 .0466 .0566 .0516 1.8974 2.156 2.305 10.52 1.181 1.441 1.311
17 .0525 .0625 .0575 2.1381   2.546   1.331 1.591 1.461
16 .0575 .0695 .0635 2.342 2.656 2.832 12.96 1.463 1.763 1.613
15 .0650 .0770 .0710 2.6481   3.138   1.653 1.953 1.803
14 .0705 .0865 .0785 2.8725 3.291 3.525 16.01 1.784 2.204 1.994
13 .0854 .1014 .0934 3.4804   4.133   2.162 2.5823 2.372
12 .0994 .1174 .1084 4.0516 4.531 4.786 22.11 2.523 2.983 2.753
11 .1143 .1323 .1233 4.6505   5.394   2.902 3.362 3.132
10 .1292 .1472 .1382 5.2675 5.781 6.002 28.21 3.280 3.740 3.510
9 .1442 .1622 .1532 5.8795   6.614   3.661 4.121 3.891
8 .1591 .1771 .1681 6.4874 6.875 7.222   4.040 4.500 4.270

Theoretical Nominal Weights based on 41.82 pounds per square foot, one inch thick

Theoretical Minimum Weights are based on 40.80 pounds per square foot, one inch thick (or, .2833 pounds per cubic inch).

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