General Information
Pro-Twist™ Gauge to Inch Chart
Steel Metal Gauge1
Nominal Gauge2 Minimum Thickness3 (Inches) Mils Maximum Design Thickness4 (Inches)
26 0.0163 16 0.0172
25 0.0179 18 0.0188
22 0.0269 27 0.0283
20 0.0329 33 0.0346
18 0.0428 43 0.0451
16 0.0538 54 0.0566
14 0.0677 68 0.0713
12 0.0966 97 0.1017
10 0.1180 118 0.1240
For SI: 1 inch = 25.4mm. 1 mil = 0.0254 mm.
1. All dimensions are inches or mils, uncoated.
2. U.S. standard gauge for uncoated hot and cold-rolled sheets. Gauge numbers are only provided as a reference and should not be used to order, design or specify steel studs or joists.
3. Minimum thickness of material delivered to the job site.
4. Design thickness of steel studs / joists shall not exceed the minimum thickness divided by 0.95. Design thickness = Min. thickness / 0.95.
5. Chart above as noted in ICBO AC 46 acceptance criteria.
Copyright 2002, PrimeSource Building Products Inc.
©2005 PrimeSource Building Products, Inc.