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 . 707.04 707- 2 Special fittings and elbows for conduits shall be of the same gauge as the conduit where they are joined. When aramid fiber bonded corrugated steel pipe is specified the pipe shall conform to ASTM A885 and the bituminous coating shall conform to the requirements of AASHTO M 190, Type A.
707.04 Corrugated Steel Pipe for Underdrains . This pipe shall conform to the
requirements of AASHTO M 36, Type I, except that all reference to "sleeve type coupler" or "coupling" as described in 9.1 and 9.2 shall be disregarded. Sleeve type couplers or couplings will not be permitted. Perforated pipe shall have Class 1 perforations.
707.05 Bituminous Coated Corrugated Steel Pipe for Underdrains. This pipe shall conform
to the requirements of AASHTO M 36, Type I. Perforated pipe shall have Class 1 perforations. Underdrain, 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 mils) 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 . Special fittings and elbows for underdrains shall be of the same gauge as the conduit where they are joined. The specified minimum size of perforations shall apply after coating.
707.06 Corrugated Aluminum Pipe . This pipe and coupling bands shall conform to the
requirements of AASHTO M196, Type 1 pipe.
707.07 Corrugated Aluminum Pipe for Underdrains. This pipe shall conform to the
requirements of AASHTO M196. Non -perforated pipe shall be Type 1. Perforated pipe shall be Type III, with Class I perforations.
707.08 Extensions. Connecting bands and extensions to existing culverts shall be of the
same type of metal or alloy, unless otherwise shown on the plans. 707.09 707- 3 707.09 Repair of Damaged Coating. Units where the spelter coating has been damaged shall be either regalvanized as provided under AASHTO M 36 or painted with one full brush coat of a zinc rich paint meeting Military Specification DOD -P-21035A, or by other approved process on properly cleaned surface, as determined by the Engineer . Bituminous coated material that has been damaged shall be repaired with field -applied asphalt mastic conforming to AASHTO M 243. Other coating material may be used when approved by the Engineer .
707.10 Polymer Precoated Corrugated Steel Pipe. Polymer precoated corrugated steel pipe
shall conform to the requirements of AASHTO M 245.
707.11 Aluminized Corrugated Steel Pipe Type 2 . Aluminized Corrugated Steel Pipe Type 2
shall conform to the requirements of AASHTO M 274. 707.11 707- 4 THIS PAGE INTENTIONALLY LEFT BLANK 708.01 708-1 SECTION 708 PAINTS
708.01 General. This specification covers ready -mixed paints and coatings. Paints and coatings
shall be manufactured eight weeks or less before delivery to the project. Each paint container shall be labeled with the name and address of the manufacturer, trade name or trademark, type of paint, number of gallons, batch number, and date of manufacture. Paints shall be free of foreign material that is capable of clogging screens, valves, pumps, and other parts of the application equipment . Paint shall not contain the following:
1.Benzene.
2.Chlorinated solvents.
3.Ethylene glycol ethers.
4.Ethylene glycol acetates.
5.Lead.
6.Mercury.
7.Chromium.
8.Cadmium.
9.Petroleum products. The Contractor shall obtain certification in writing from the manufacturer showing that the product is free of the materials described above and that it meets or exceeds the requirements of 29 CFR 1910.1200. Paints shall not form a surface skin within 48 hours in three -quarter filled, tightly closed containers. Paint and coating pigments shall be lead free, and shall not thicken, become granular , or curdle in their containers. Volatile Organic Compound (VOC) levels for paints and coatings shall comply with the most current EPA regulations. All product compositional proportions are specified by weight. Material Safety Data Sheets and manufacturer’s recommended application instruction sheets representing each paint and coating shall be submitted to the Engineer for the project records before use.
708.02 List of Paints.
PAINTS SPECIFICATION Structural Steel Bridge Paint Subsection 708.03 White Wood Primer TT-P-25 Outside White Paint TT-P-102, Class A Exterior Black Paint TT-P-61 Black or White Baking Enamel TT-E-489, Class B Federal Yellow Enamel TT-E-489, Class A Aluminum Paint Subsection 708.04 Pavement Marking Paint Subsection 708.05
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 857–860 of 943.