Specifications include, but are not limited to: 3 12-inch to 24-inch (300-1500 mm) pipe shall have smooth interior and annular exterior corrugations and meet or exceed ASTM F2881 and AASHTO M330. 4 Manning’s “n” value for use in design shall be 0.012. 5 Pipe shall be joined using a bell and spigot joint or a straight wall joint meeting the requirements of ASTM F2881 or AASHTO M330. 6 The joint shall be watertight according to requirements of ASTM D3212. 7 Gaskets shall meet the requirements of ASTM F477. 8 Gaskets shall be installed by the pipe manufacturer and covered with a removable, protective wrap to ensure the gasket is free from debris. 9 A joint lubricant available from the manufacturer shall be used on the gasket and bell during assembly. 10 12-inch to 24-inch (300-1500 mm) diameters shall have an exterior bell wrap installed by the manufacturer. 11 Fittings shall conform to ASTM F2881 and AASHTO M330.