Specifications include, but are not limited to: 2.1 All helically corrugated aluminized coated steel pipe shall be manufactured in accordance with AASHTO M-36-82, with the diameter, gauge, and corrugations specified. All of the pipe shall have a minimum of two (2) re-rolled annular corrugations per end to accommodate a corrugated pipe band. 2.2 All items shall be aluminum coated (type II) steel sheets per AASHTO M-274-81. 2.3 Connecting bands shall be corrugated or hugger type bands as shown in the bid document. Connecting bands with projections (dimples) shall not be used on corrugated metal pipe. 2.4 Connecting bands shall be of the same material as the pipe, and shall be of two (2) nominal gauges lighter than the pipe, but not less than sixteen (16) gauge. The necessary quantity of ½ inch x 6-inch bolts conforming to ASTM A-307 Grade A, and nuts conforming to ASTM A-563 Grade A, shall be included with the bands. The width of the connecting bands shall conform to AASHTO M-36, Section 21.2. 2.5 If requested, the selected Contractor shall provide a Certified Analysis, per Section 5 of AASHTO M-36 and/or a guarantee per Section 6 of AASHTO M-36. 2.6 All Contractors must comply with the State of Maryland Finance and Procurement Cost annotated sub sections 17-301 through 17-306 regarding “Maryland Buy American Steel Act”. 2.7 All Corrugated exterior, smooth interior, high-density polyethylene (HDPE) pipe must meet the following: High-density polyethylene (HDPE) Soil Tight (STIB) Water Tight (WTIB) Diameters Available *4-60 inch (100-1500 mm) *4-60 inch (100-1500 mm) Lengths Available 13, 20 feet (4, 6 m) 13, 20 feet (4, 6 m) Joint Performance Soil Tight Water Tight (ASTM D3212) Joining System Integral Bell & Gasketed Spigot Water Tight Reinforced Integral Bell & Gasketed Spigot Specifications AASHTO M252 (4-10 inch) (100- 250 mm) AASHTO M252 (4-10 inch) (100-250 mm) AASHTO M294 (12-60 inch) (300- 1500 mm) AASHTO M294 (12-60 inch) (300-1500 mm) ASTM F2306 (12-60 inch) (300- 1500 mm) ASTM F2306 (12-60 inch) (300-1500 mm) Design Service Life Minimum 100 Year Minimum 100 Year