FORMED STEEL BEAM RAILING, CABLE RAIL, ANCHOR CABLE,
STEEL POST FOR GUARDRAIL & BEAM GUARDRAIL END TERMINAL
This IM covers beam and cable guardrail, wood posts, steel posts and end terminals.
Steel beam guardrail components, steel beam guardrail end terminal and flared end terminal for cable connection shall meet the requirements Section 4155 of the Standard Specifications and the Standard Road Plan BA-200, BA-205 and BA-206.
Approved sources are listed in the Materials Approved Products Listing Enterprise (MAPLE).
Prior to furnishing materials for a project the fabricator will furnish a Brand Registration and Guarantee to the Office of Construction and Materials. Detailed drawings and samples of each rail component will also be submitted with each request. The above requirements apply to each fabricating plant even though the Brand Registration may be the same.
Approved Fabricator Brand Registrations and Guarantees are listed in Appendix A.
Cable rail shall meet the requirements of Section 4155.03 A of the Standard Specifications.
Anchor cable shall meet the requirements of Section 4155.03 B of the Standard Specifications.
WOOD POST
Wood posts shall meet the requirements of Section 4155.04 A of the Standard Specifications.
Steel posts shall meet the requirements of Section 4155.04 B of the Standard Specifications.
SPACER BLOCKS
Wood spacer blocks shall meet the requirements for wood posts. Steel spacer blocks shall meet the requirements for steel posts. Spacer blocks manufactured from alternate materials that have not received FHWA approval may not be substituted for wood or steel blocks.
GALVANIZING REPAIR
Where the galvanizing on guardrail or fittings has been damaged, the coating shall be repaired by re-galvanizing or the surface repaired by painting with separate coats of zinc dust/zinc oxide paint conforming to the requirements of IM 410.
If welding is employed FCAW process shall be used welding shall be performed by a certified welder. All welds shall be ground smooth and mechanically cleaned before galvanizing repair.
Sampling and inspecting will be done at the supplier warehouse on each shipment of guardrail material. Test reports will be on file at the warehouse and at the District Materials office. The sample size shall be 1 in. by 12 in. secured from the edge of beam railing. One set per size of nuts, bolts, and washers shall be secured at random for testing.
For direct shipments only, the District Materials Office will secure monitor samples. A minimum of one sample should be secured annually for each fabricator with an approved Brand Registration & Guarantee. The sample size shall be 1 in. by 12 in. secured from the edge of beam railing. One set per size of nuts, bolts, and washers shall be secured at random for testing.
CERTIFCATION STATEMENT
Material from a supplier may be incorporated in a project provided each shipment is accompanied by a bill of lading containing a Certification Statement as outlined below. An authorized representative of the supplier shall sign the certification statement.
The following information and certification shall appear on the above documents.
1. Supplier Name
2. Project Number
3. Itemized materials list
4. Materials lab numbers
5. An inspection report for wood posts
6. A mill test report for steel posts, not part of end terminal section.
The material itemized in this shipment is certified to meet the specification requirements of the Iowa Department of Transportation. All products of steel or iron meet the requirements of IM 107, Buy America.
All Beam Guardrail, bolts, nuts, and washers were tested and approved under Materials Lab Numbers:
ACCEPTANCE OF BEAM RAILING
Material shall be accepted on the basis of manufacturer certification, and approved brand registration (listed in Appendix A).
Prior to incorporation into a project, the markings on the beam element end sections and backup plates shall be checked for name or brand of manufacturer and shall be documented in the field book. Markings for end sections and back-up plates may be accepted on durable tags securely attached to each section or bundle in lieu of the above on the individual pieces.
The beam elements shall be identified as follows:
1. Name & Brand of Manufacturer
2. Identification Symbols or Code for Heat Number
3. Coating Lot
4. AASHTO Specification Designation Number
5. Class & Type
Acceptance of steel posts to be incorporated into a project shall be based on a Certified Mill Test Analysis of the steel.