CORRUGATED ZINC-COATED STEEL PLATES
FOR PIPES & ARCHES
***GENERAL REWRITE – PLEASE READ CAREFULLY.***
This memorandum covers galvanized corrugated steel structural plates and fasteners for use in the construction of pipe, pipe arches, arches, underpasses and special shapes for field assembly. Materials shall meet the requirements of Standard Specifications 4144.
Approved sources are listed in the Materials Approved Products Listing Enterprise (MAPLE).
Prior to furnishing material for a project the fabricator shall submit a Certification and Guarantee as provided for in AASHTO M167 (M167M) to the Office of Construction and Materials.
Material from a fabricator with an approved certification and guarantee may be incorporated in a project provided each shipment is accompanied by either a bill of lading or a separate letter form listing the information and containing a certification of compliance as outlined below. An authorized representative of the fabricator shall sign the certification statement.
The following information and certification shall appear on the above documents.
1. Fabricator Name
2. Description of Materials
5. Project Number
6. Number of pieces, thickness, diameter, length and brand
7. List of heat numbers in the shipment
It is hereby certified that the material furnished as listed was manufactured in accordance with and meets the requirements of AASHTO M167 (M167M) as modified by the Iowa Department of Transportation Specifications. We also certify that all steel used to fabricate this material meets the requirements of IM 107 Group 1, Buy America.
Each plate shall be identified as follows:
1. Name of plate fabricator
2. Identification showing heat number and coating lot number
3. Specified zinc-coated plate thickness
4. Specified coating mass - NOTE: Coating shall adhere to the base metal, so that no peeling or flaking occurs during handling and/or shipping.
5. Identification symbols showing sheet manufacturer and heat number or lot number.
6. AASHTO M167 (M167M) Designation.
The District Materials Office shall secure monitor samples from projects. A minimum of one sample should be obtained annually for each fabricator. The sample size shall be 1 foot by 1 foot square obtained from an end section. One set per size of bolts, nuts, and washers shall be obtained at random for testing.
Acceptance will be based on approved producers and fabricators listed in Appendix A.