| Designator | SSS21a-b |
| System Type | Slipbase (S) |
| Test Specification | AASHTO MASH 2016 |
| Test Level | TL-3 |
| Drawing Status | Review Complete |
| Maximum Legs/7ft | 2 |
| Contact | Xcessories Squared Dev. & Mfg. Inc. |
| Manufacturer | Xcessories Squared |
| FHWA Eligibility Letter | SS-182.pdf |
| Components | |
| Drawings | SSS21a-b_final20191115.pdf |
| Other Docs | SS-180.pdf SS-180rev.pdf SS-182.pdf |
| Archive | |
| External Links |