Swage Locked I-Bar Grating is one of our most popular grating products. The I-Bar shaped bearing bars provide equal strength to rectangular bar grating of equal depth, but at a lighter weight and lower cost. The I-Bar shaped bearing bars are available in 7 different depths ranging from 1" to 2-1/2". Swage locked I-bar grating is offered in either 1-3/16" (19-spacing) or 15/16" (15-spacing). The striated flanges provide a slip resistance surface without the additional cost of serration.