AASHTO M 180:2018 Standard Specification for Corrugated Sheet Steel Beams for Highway Guardrail.
5.2.1. The engineer may take one piece of guardrail, a backup plate, and end or buffer section from each
200 pieces in a lot, or from each lot if less than 200 pieces are included therein, for determination of compliance with specification requirements. If one piece fails to meet the requirements, two other pieces shall be tested. If either of these pieces fails to conform to the requirements of this specification, the lot of material represented by these samples shall be rejected. A lot shall he considered that quantity of material offered for inspection at one time that bears the same heat and coating identification.
5.3. Acceptance by Brand Registration and Guarantee:
5.3.1. By mutual agreement between the fabricator and engineer, acceptance may he based on a brand registration and guarantee filed with the engineer by the fabricator. For acceptance of a brand, the fabricator shall furnish a brand registration and guarantee meeting the approval of the engineer and showing the brand name or designation. the manner in which it will appear on the fabricated beams, the typical mechanical properties, chemical composition if specified, the class and type of guardrail, and other specified properties. The fabricator shall also guarantee that as long as material is furnished under that brand and designation, it will conform fully to the requirements of the specification and shall be replaced without cost to the engineer when found not in conformity with any of the specified requirements. The brand registration and guarantee shall be sworn to for the fabricator by a person having legal authority to bind the company. Upon approval of a brand registration and guarantee, that brand will be accepted without further certification. If. in subsequent actual field use, there is evidence of misbranding as determined by random sampling and detection of inadequate tensile strength. yield strength, elongation, improper coating, deficient thickness, or improper fabrication, the material will be rejected and approval for further use withdrawn until subsequently reapproved. Samples for test of any material offered for use may be taken at any time deemed desirable by the engineer.
5.3.2. The manufacturer or fabricator shall make such tests and measurements as necessary to ensure that the material produced complies with all specification requirements. These tests and measurements shall be so identified by the identification symbols or code used on the beam that the manufacturer can produce specific reports showing these test results. Copies of reports of these tests shall be kept on file and shall he submitted to the engineer on request.
5.3.3. The brand shall be removed or oblitcrated by the manufacturer or fabricator on all material where control tests, as outlined herein, do not show conformance to this specification.AASHTO M 180 pdf download.