¶ Thrie-Beam
Thrie-Beam is a wider version of w-beam with three distinct ridges. It is typically employed where greater strength is required.
¶ Operation
To Be Completed
¶ Devices
Thrie-Beam is found on the road in a variety of configurations:
- Thrie-Beam Guardrail
- Modified Thrie-Beam Guardrail
- 3N Guardrail
- BLIDTL4C2-MASH
- Ezy-Guard High Containment (HC)
- Gregory Mini Spacer Thrie-Beam (GMS-TB)
- Trinity T-39 (Thrie-beam)
The sources of the specific device names are documented here.
¶ Condition Assesment
Several agencies have created detailed guardrail repair standards and assesment criteria, notably:
- FHWA - 2008-fhwa_wbeam_repair.pdf
- NCHRP - 2014_w-beam_damage_assesment_guide.pdf