A.
Reinforced Concrete Pipe.
Unless otherwise shown on plans, use reinforced concrete pipe (RCP), ASTM C76, Class III, with rubber gasket joints.
B.
High Density Corrugated Polyethylene Pipe (HDCPP).
1.
Pipe and fitting material shall be high-density polyethylene meeting ASTM D3350 minimum cell classification 324420C for 4 through 10-inch diameters or 335420C for 12 through 60-inch diameters.
2.
Fittings shall conform to AASHTO M294. Fabricated fittings shall be welded on the interior and exterior at all junctions.
3.
Pipe shall be joined with a bell-and-spigot type joint meeting the requirements of AASHTO M294. The joint shall be watertight according to the requirements of ASTM D3212. 30" through 60" pipe joints shall be watertight according to ASTM D3212 with the exception that the joint be tested using 5.0 psi (34.5 kPa) and the test apparatus shall meet the ASTM C1103 requirements. Gaskets shall be made of polyisoprene meeting the requirements of ASTM F477 with the condition that the gaskets shall not have any visible cracking when tested according to ASTM D1149 after 72 hour exposure in 50 PPHM ozone at 104° Fahrenheit. Gaskets shall be installed by the pipe manufacturer and covered with a removable wrap to ensure the gasket is free from debris. Joints shall remain watertight when subjected to a 1.5° axial misalignment. A joint lubricant supplied by the manufacturer shall be used on the gasket and bell during assembly.
C.
PVC Pipe.
PVC pipe and fittings shall be manufactured from 12454B or 12454C all class material per ASTM D1784 and shall have a minimum stiffness of 46 16/in./in. at 5% deflection in accordance with ASTM D2412. Joints may be external plastic sleeve with gaskets or an integral bell, gasketed joint. Joints shall be watertight in accordance with ASTM D3212.
D.
Precast Concrete Box Culverts.
Precast concrete boxes shall conform to ASTM C789 or C850. Unless otherwise shown on plans, design for earth dead load plus HS20 live load.
E.
Rubber Joint Gaskets.
Gaskets for joints in bell and spigot concrete pipe shall meet ASTM C-443.
F.
Materials for Drainage Structures.
The mortar used for other drainage structure connections shall consist of one (1) part by volume of Portland cement and two (2) parts of sand. The Portland cement shall conform to the requirements of ASTM C150, Type I. The sand shall conform to the requirements of AASHTO Specification M-45. Hydrated lime may be added to the sand and cement mixture in an amount of ten (10) percent of the volume of cement used. The hydrated lime shall comply with ASTM Specification C207, Type S requirements. The water quantity mixture shall be adequate to produce a stiff workable mortar, but shall not be greater than six (6) gallons of water per sack of cement. Water shall be clean and free of acids, alkalies, and organic impurities. The mortar shall be used within thirty (30) minutes from the time the ingredients are mixed with water. The mortar shall be protected on the outside in order to obtain a sufficient curing time.
(Ordinance 2007-106, App. B, adopted 3/20/07)