An AASHTO M180 Thrie-Beam guardrail is a three-wave corrugated steel beam supplied to the beam material and workmanship requirements stated in the project documents. It should be ordered with compatible posts, spacers, fasteners, terminals and transitions; AASHTO M180 alone does not define the crash performance of the completed roadside barrier.
Conclusion: A Thrie-Beam guardrail order should define the beam and all compatible system components required by the approved project arrangement.
Applicable conditions: The rail profile, dimensions, coating, posts, spacers, terminals and transitions depend on the drawings, BOQ and governing project specification.
Evidence: AASHTO M180 addresses corrugated sheet-steel guardrail beam requirements, and the product configuration below identifies the order details that should be matched to the approved documents.
Exception: Meeting a beam specification alone does not establish a crash-test level or the performance of the completed installed barrier system.
Reference: AASHTO M180, corrugated sheet-steel guardrail beam specification. Confirm the applicable edition and project requirements before production.
Three-wave corrugated steel guardrail beams supplied to approved AASHTO M180 project requirements, with compatible posts, spacers, backup plates, fasteners, transitions and terminal components.
Thrie-beam guardrail uses a three-wave corrugated profile with a wider face than a conventional W-beam panel. It is normally ordered as part of a complete roadside barrier layout that includes the specified posts, blockouts or spacers, backup plates, bolts, terminals and transitions.
SinoGuardrail prepares beam length, base-metal thickness, steel grade, hole pattern, coating mass and matching components according to the approved project drawing and purchase specification. Common steel options include Q235/Q345 or equivalent grades, subject to the required mechanical properties and mill documentation.
AASHTO M180 is a specification for corrugated sheet-steel highway guardrail beams. It addresses requirements such as beam type, base metal, dimensions, tolerances, coating and workmanship for the supplied rail.
AASHTO M180 is not, by itself, a crash-test level for the complete installed barrier. The performance of a roadside barrier depends on the full approved system, including beam profile, post type and spacing, mounting height, blockout, fasteners, terminals, transitions, foundation and installation condition.
| Item | Available Project Configuration |
|---|---|
| Product Profile | Thrie-beam, three-wave corrugated steel guardrail panel |
| Supply Standard | AASHTO M180 requirements as specified in the purchase order and approved drawings |
| Steel Grade | Q235, Q345 or equivalent grades can be supplied when their mechanical properties match the approved requirement |
| Beam Length | Total length and effective installed length are confirmed from post spacing, lap direction and approved project drawings |
| Base-Metal Thickness | Produced to the nominal thickness and tolerance stated in the project specification; custom thickness must be identified before quotation |
| Hole Pattern | Splice slots and post-connection holes manufactured according to the approved drawing |
| Surface Treatment | Hot-dip galvanized; additional colour coating can be considered when specified |
| Zinc Coating | Common project options include 550 g/m² and 1100 g/m²; final coating mass and inspection method follow the purchase specification |
| Matching Components | Posts, spacers or blockouts, backup plates, splice bolts, post bolts, washers, terminals and transition sections |
| Documentation | Approved shop drawings, packing list and agreed material or coating inspection documents |
Before confirming a purchase order, check the following items on the drawing:
Three-wave profile and profile orientation
Total panel length and effective installed length
Nominal base-metal thickness and permitted tolerance
Splice-slot pattern and post-connection holes
Post type, post spacing and mounting height
Required spacer, blockout or backup plate
Terminal and transition arrangement
Coating mass, inspection method and marking requirement
A project quotation can cover the beam only or a coordinated system bill of quantities:
Thrie-beam panels
End or connection sections to approved drawings
Sigma posts where specified
Project-matched blockouts, spacers and backup plates
Washers and anti-rotation hardware
Reflectors and delineation components when specified
A correct thrie-beam quotation starts with the complete approved barrier arrangement, not the rail panel alone. Use the resources below to confirm the component list before issuing an RFQ or ordering replacement parts.
Use the Highway Guardrail Components and BOQ Checklist to verify rails, posts, spacers, bolts, terminals and transition items before quotation.
Read the Highway Guardrail Post Types Guide to match H, Sigma, U, C or round posts to the approved rail, spacer and ground connection detail.
For replacement work after an impact, use the Highway Guardrail Maintenance and Repair Guide and inspect adjacent components before ordering parts.
A project designer may specify a thrie-beam profile at bridge approaches, transitions, medians, roadside sections or other locations where the approved barrier design calls for a three-wave rail. The product should not be substituted for a W-beam panel solely because it appears wider or heavier.
Selection must follow the road authority's approved system drawing and required performance documentation. For a general comparison of the two profiles, see W-Beam vs Thrie-Beam Guardrail.
Drawing check: panel length, thickness, hole positions and component quantities are checked against the approved order documents.
Material check: steel grade and agreed mechanical-property documents are matched to the purchase requirement.
Coating check: zinc coating inspection is carried out using the method agreed in the order or inspection plan.
Trial matching: beam, spacer, post and fastener interfaces can be checked before packing when included in the inspection scope.
Export packing: beams are bundled, posts are bundled or palletized, and smaller hardware is packed in marked bags, cartons or cases.
Drawing, quantity, total and effective length, thickness, steel grade, hole pattern, coating and marking.
Post type and spacing, spacer or blockout, backup plate, bolt sets, terminal, transition and reflector requirements.
Project country, required documents, inspection requirement, delivery schedule, packing marks and destination port.
Yes. Length, thickness and hole pattern can be manufactured according to approved drawings, but changes must remain compatible with the complete project system.
No. AASHTO M180 specifies the steel guardrail beam. Complete barrier performance must be supported by the applicable system design and performance documentation.
Yes. Send the project BOQ or system drawing so all matching components can be checked and quoted together.
Total length is the complete physical panel length. Effective length is the installed coverage after adjacent panels overlap. Both values should be confirmed from the approved drawing.
Read the Thrie-Beam Guardrail Specification Guide for selection considerations. This product page is intended for drawing confirmation, component matching and project RFQs.
Send the beam drawing, required quantity, thickness, steel grade, coating requirement, posts, spacers, bolts, transitions, inspection requirement and destination port.
For drawings, BOQ-based purchasing and project-specific requirements, see our Thrie-Beam guardrail system configurations.
SinoGuardrail supplies highway guardrails and roller barrier systems for contractors, distributors and infrastructure project buyers in Southeast Asia, the Middle East, Africa and South America.
Contact: Mr.Zhang
Phone: +86 13306356181
Email: [email protected]
Add: Guanxian Economic Development Zone, Liaocheng City, Shandong Province, China
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