Specifications include, but are not limited to: N. The work shall consist of furnishing and delivering culverts and under-drains (as applicable) of the following type: Metal: GCMP, Galvanized Corrugated Metal Pipe and Under-drains; ALCCMP, Aluminum Coated Corrugated Metal Pipe (Type 2) and Under-drains; PPGCMP, Polymer Pre-coated Galvanized Corrugated Metal Pipe and Under-drains; CAAP, Corrugated Aluminum Alloy Pipe and Under-drains. Corrugated steel pipe, under-drain and coupling bands shall conform to the requirements of AASHTO M36 and Attachments B and C as applicable. Material furnished under this Subsection shall be formed from sheet material coated in accordance with AASHTO M218 and M274. a) Coupling Bands. Coupling bands shall conform to AASHTO M36 and Attachment C, with the following modifications: (1) Coupling bands and their connections shall be of such dimensions as required to meet the “Erosion Special Joint” category criteria of Division II of the AASHTO Standard Specifications for Highway Bridges. Structural steel for band connections shall conform to ASTM A 36/A 36M. (2) The only approved methods of connection and connection details at the ends of the bands shall be: a. 2 × 2 × 3/16 inch galvanized steel angles extending the full width of the band. b. 12 gauge die-cast angle with a configuration that provides at least the same section modulus as the 2× 2 × 3/16 inch angle, extending the full width of the band. c. Minimum of two bolts for a 7 inch wide band, three bolts for a 12 inch wide band, and five bolts for a 24 inch wide band, uniformly spaced. Bolts, nuts, and other threaded items used with coupling bands shall be coated by the electroplating process as provided in ASTM B 633, Class Fe/Zn 25 the zinc Hot-dipped coating process as provided in AASHTO M 232M/M 232 or the mechanical zinc coating process as provided in ASTM B695, Class 25. d. Angles will be connected to bands by one of the following: 1. Spot welds spread over full width of the band, 2. Stitch-welded over the full width of the band, or 3. Attached by rivets...
