WEBThis article will provide a comprehensive guide to four common steel bar grating specifications: 15-W-4, 22-W-4, 30-W-4, and 38-W-4. If you wish to learn about 19-W-4, we have a dedicated page for it. For ADA compliance, view our page for 11-W-4. 11-W-4 Steel Bar Grating. -Bearing Bar Spacing: 11/16" center-to-center.