Preapproved Materials Guard Fence
Deep Beam Guard Rail
| Manufacturer | Brand | Comment |
| Bryson Products / Central Fabricators | CF | |
| Gregory Highway Products, Inc. | GH | Others listed on PQL 13.1:Anderson, Armco, Bethlehem Steel, Buffalo Specialty, Contech, Granco, Marwais, Syro and Rollform
Most of these are no longer in business, some were bought out by Trinity Industries |
| Highway Safety Corporation | HS | |
| RG Steel Corporation | RG | |
| Trinity Industries, Inc. | No brand listed on PQL |