Testing Steel Post in Tube Options for Use with MASH Compliant Guardrail End Treatments

The research will compare the behavior of steel posts-in-tubes in soils as compared to direct buried steel posts, using bogie testing, Finite Element Analysis, and potentially full scale crash testing. The project hopes to demonstrate that post-in-tubes can be used as an alternative to direct buried posts. Positive results from the study will serve Alaska by establishing conditions under which posts-in-tubes may be substituted for direct buried posts where the resulting assembly can be considered MASH compliant and thus eligible for federal-aid. Without an alternative to an eligible post option for TL-3 guardrail end treatments, the Department will be required to install devices for which safety to motorists and maintenance personnel may be reduced by delayed repair and the cost of maintenance is increased.