706.01 706- 1 SECTION 706 CONCRETE AND CLAY PIPE
706.01 Nonreinforced Concrete Pipe. This pipe shall conform to the requirements of AASHTO
M 86 for the specified diameters and strength classes. Pipe shall be obtained from a manufacturer that is a current plant quality certified member of the American Concrete Pipe Association (ACPA ), meeting all current ACPA requirements for this certification. A copy of the ACPA certification shall be submitted to the Engineer before delivery of the pipe.
706.02 Reinforced Concrete Pipe . This pipe shall conform to the requirements of AASHTO M
170 for the specified diameters and strength classes. Unless otherwise specified, pipe wall design and use of elliptical reinforcement in circular pipe are optional. Reinforced concrete pipe being jacked shall be Class V and shall be furnished with grouting nipples spaced not more than eight feet apart. Joints for this pipe shall come equipped with steel rings and rubber gaskets conforming to ASTM C361. Elliptical pipe conforming to AASHTO M 207 shall be furnished when required on the plans. Arch pipe conforming to AASHTO M 206 shall be furnished when required on the plans. Precast reinforced concrete end sections shall have one of the following:
1.At least one line of reinforcement conforming to the requirements of AASHTO M 170 equivalent to the square inches per linear foot for elliptical reinforcement in circular pipe, Class II, Wall B, or
2.Macro fiber at 5.0 lb/cy. Pipe shall be obtained from a manufacturer that is a current plant quality certified member of the American Concrete Pipe Association (ACPA), meeting all current ACPA requirements for this certification. A copy of the ACPA certification shall be submitted to the Engineer before delivery of the pipe.
706.03 Perforated Concrete Pipe. This pipe shall conform to the requirements of AASHTO M
175 for the specified diameters and strength classes. Unless otherwise specified, perforations shall be Type 1. Pipe shall be obtained from a manufacturer that is a current plant quality certified member of the American Concrete Pipe Association (ACPA), meeting all current ACPA requirements for this certification. A copy of the ACPA certification shall be submitted to the Engineer before delivery of the pipe.
706.04 Drain Tile . This pipe shall conform to the requirements of AASHTO M 178 or M 179 for
the specified material, diameters and quality classes.
706.05 Porous Concrete Pipe . This pipe shall conform to the requirements of AASHTO M 176
for the specified diameters. Pipe shall be obtained from a manufacturer that is a current plant quality certified member of the American Concrete Pipe Association (ACPA), meeting all current ACPA requirements for this certification. 706.06 706- 2 A copy of the ACPA certification shall be submitted to the Engineer before delivery of the pipe.
706.06 Vitrified Clay Pipe . This pipe shall conform to the requirements of AASHTO M 65 for
the specified diameter and strength class.
706.07 Coated Concrete Pipe. This pipe may be reinforced or nonreinforced per the
requirements shown on the plans for the designated diameters and strength classes, and in addition, shall be coated with asphalt mastic conforming to the requirements of AASHTO M 243. Asphalt mastic shall be uniformly applied in two coats by spray or brush to the entire designated surface to be coated, to a total thickness of 50 mils. Asphalt mastic may also be applied by trowel in one coat provided the required thickness is obtained. T he first coat shall be dry to touch before the second coat is applied. The second coat shall be dry to touch before any handling or backfilling operations . The finished coat shall cover the surface to be protected evenly, without running, and without any visible holidays, bubbles, or bare spots. 707.01 707- 1 SECTION 707 METAL PIPE
707.01 Ductile Iron Pipe . This pipe shall conform to the requirements of ASTM A716 for the
specified diameters and strength classes. Unless otherwise specified either smooth, corrugated or ribbed pipe may be furnished.
707.02 Corrugated Steel Pipe and Pipe Arches . These conduits and coupling bands shall
conform to the requirements of AASHTO M 36, except for the following: Sawed ends and butt -welded joints will be permitted for pipe with helical corrugations formed with continuous lock or welded seams provided all burrs are removed from sawed ends and provided the welds are acceptable. Pipe fabricated with resistance spot welds shall also conform to the following additional requirement: Where double welding is necessary, adjacent welds shall not be closer than two spot-weld nugget diameters from center to center. Shop formed elliptical pipe shall be furnished where specified. Field elongation will be accepted as an alternate to shop elongation when done in a neat workmanlike manner. Special fittings and elbows for these conduits shall be the same metal thickness as the conduit where they are joined and shall conform to the applicable requirements of AASHTO M 36. Semicircular corrugated steel pipe for encasement, along with required fastening devices, shall conform to the requirements of this subsection and the requirements of Military Specification MIL-P-236, Type I or II, Class 1. Coupling bands shall conform to the requirements of AASHTO M 36 with the following exceptions:
1.The use of channel bands as described in 9.1 of AASHTO M 36 will not be allowed.
2.Connecting bands shall be at least 10 1/2 inches wide.
707.03 Bituminous Coated Corrugated Steel Pipe and Pipe Arches . Conduit, fittings, elbows,
end sections and coupling bands shall be fully coated with bituminous material conforming to the requirements of AASHTO M 190, Type A coating or materials conforming to the requirements of AASHTO M 243, except that the use of tar base material will not be permitted. Coatings shall be shop applied. The finished coat shall uniformly cover the surface to be protected. The coating shall not contain any visible holidays, bubbles or bare spots. Minimum thickness shall be 1.3 mm (50 mi ls) measured on the crest of the corrugations. In complying with AASHTO M 190, each section shall be given a double dip application. In the first immersion, the section shall remain submerged until the metal has reached a temperature that will allow the hot bituminous material to penetrate and seal eac h joint. Other coatings meeting the requirements of AASHTO M 190 or M 243 will be acceptable upon written approval by the Engineer . Materials meeting the requirements of AASHTO M 243 shall be uniformly applied by spray, trowel, or brush to the entire designated surface to be coated, to a minimum thickness of 1.3 mm (50 mils). The coating shall be dry to the touch before any handling or backfilling operations .
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 855–856 of 943.