STORM SEWER PIPE
854.01 Concrete (Storm) Sewer Pipe.
a.Plain Concrete Pipe (PC). Only plain concrete pipe 24 inches {610 mm} or less in diameter (or equivalent area in arch pipe) will be permitted. Circular pipe shall meet the requirements for Class 2 pipe of AASHTO M 86 or for Class II of AASHTO M 170 without steel reinforcement, provided the same strength requirements for the same size pipe provided in AASHTO M 86 for Class II pipe are met.
b.Reinforced Concrete Pipe (RC). Circular pipe over 24 inches {610 mm} in diameter shall meet the requirements of AASHTO M 170 for Class II unless another class is designated by the plans or proposal. Arch pipe larger than 18 inch {455 mm} rise by 28.5 inch {725 mm} span shall meet the requirements of AASHTO M 206 for Class A-II unless another class is designated by the plans or proposal.
c.Acceptance. In addition to the above requirements, all precast products furnished must meet the requirements of Section 831, Precast Concrete Products.
854.02 Coated, Smooth Lined Corrugated Metal (Storm) Sewer Pipe (CSLCM).
CSLCM shall meet the requirements of AASHTO M 36 or AASHTO M 196 for Type 1A pipe. The shell and liner shall be pre-coated on both sides with a 10 mil {0.25 mm} polymeric coating as per AASHTO M 246. For correlation purposes the following table provides acceptable shell and liner plate thickness which may be used to equate with Corrugated Metal Pipe (CM) wall thicknesses. Class of Pipe Equivalent Single Steel Sheet Wall Thickness
S.L. Wall Thickness Shell Liner 1 0.064 inches {1.6 mm} 0.052 inches {1.3 mm} 0.04 inches {1.0 mm} 2 0.079 inches {2.0 mm} 0.052 inches {1.3 mm} 0.04 inches {1.0 mm} 3 0.109 inches {2.8 mm} 0.079 inches {2.0 mm} 0.04 inches {1.0 mm} 4 0.138 inches {3.5 mm} 0.109 inches {2.8 mm} 0.04 inches {1.0 mm} NOTE: For aluminum all thicknesses may be reduced by 0.004 inches {0.10 mm} to compensate for zinc coating. Connecting bands shall conform to the appropriate provisions of AASHTO M 36 or M 196 for the type material used and shall have the same type coating as used on the pipe. Appropriate designed waterproof gaskets shall be used in conjunction with connecting bands to form a watertight joint. Gasket material shall be neoprene or other approved material. Damage to coatings shall be repaired in accordance with the appropriate provisions of AASHTO M 245 for a polymeric coating.
854.03 Coated Smooth Flow Corrugated Metal (Storm) Sewer Pipe (CSFCM).
CSFCM shall meet the applicable requirements of Article 850.02 or Article 850.03 and the following: All pipes shall have a protective coating in accordance with the applicable provisions of Subarticle 850.02(c). In addition the inside of the pipe shall have a paved lining for the entire inside periphery which will fill the valleys to the extent that the thickness above the top of the crest of the corrugations will not be less than 1/8 inch {3 mm}. The lining shall be smooth and uniform and its surface shall be parallel to a line projected along the crest parallel to the centerline. Bituminous coating and pavement lining shall conform to the requirements of AASHTO M 246 for Type B sheets with the pavement lining formed from material compatible with the coating material and otherwise meeting the same basic requirements of Section 5 of AASHTO M 190. Connecting bands shall meet the requirements of Subarticle 850.02(d) and have appropriate waterproof seals in accordance with Article 846.02. Damage to coating and pavement linings shall be repaired in accordance with the appropriate provisions of AASHTO M 245 for polymeric material and approved asphalt mastic as noted in AASHTO M 245. SECTION 855 COATINGS, PAINTS, ENAMELS, AND VARNISHES FOR METAL AND WOOD STRUCTURES
854.04 Concrete Lined Corrugated Metal (Storm) Sewer Pipe (CL).
CL shall meet the requirements of Article 850.02 or Article 851.02 with the lining as specified in Item 850.02(c)4. 854.05Polyvinyl Chloride (Storm or Sanitary) Sewer Pipe (PVC) and Fittings. PVC and fittings shall meet the requirements of ASTM D 2665, ASTM D 3034 SDR 35, or ASTM F 949.
854.06 High Density Polyethylene (Storm) Sewer Pipe (HDPE).
HDPE shall meet the requirements of AASHTO M 294, Type S. HDPE shall be furnished from an approved producer. Approved producers are shown on List I-11, "Producers of High Density Polyethylene Pipe" in the Department’s "Materials, Sources and Devices with Special Acceptance Requirements" manual. Information concerning this list is given in Subarticle 106.01(f).
854.07 High Performance Polypropylene (Storm) Sewer Pipe (PP).
PP shall meet the requirements of AASHTO M 330. PP shall be furnished from an approved producer. Approved producers are shown on List I-14, "Producers of Polypropylene Pipe" in the Department’s "Materials, Sources and Devices with Special Acceptance Requirements" manual. Information concerning this list is given in Subarticle 106.01(f).
854.08 Handling and Storage.
Pipe shall be handled, transported, delivered, and stored by methods that will not damage the pipe, coatings, or linings. Any pipe damaged or bent will be rejected even though previously inspected and found satisfactory, and shall be replaced or repaired at the Engineer's option, without additional compensation. Coating or linings scratched shall be repaired in a satisfactory manner with appropriate material.
854.09 Joint Materials.
Joint material shall provide a suitable waterproof joint capable of withstanding internal pressure of the system involved and be of an approved type. Joint material for storm sewers shall be the same as specified in Section 530 for Roadway Pipe, or those specified for Sanitary Sewers in Section 645. Thermal fusing will be allowed for PVC pipe joints if installed according to the manufacturer’s recommendations. Other types may be considered if appropriate backup data, etc. is submitted in writing to the Central Office for evaluation. SECTION 855 COATINGS, PAINTS, ENAMELS, AND VARNISHES FOR METAL AND WOOD STRUCTURES
855.01 General Information.
This Section covers the specifications of the above mentioned materials and their components. Unless otherwise specified, all materials shall be delivered to the job completely mixed and ready for use without the addition of oils or thinners. All materials shall be well ground, shall not settle or cake badly in the container, and shall be readily broken up to a smooth, uniform material. When brushed or sprayed on a smooth, vertical surface, the material shall dry hard and elastic without running, streaking, sagging, or spotting. No materials shall exceed the maximum volatile organic solvent content (V.O.C.) allowed by the current Federal and State laws governing their use in the State of Alabama.
855.02 Storage.
a.All materials and their components shall be amply protected from all forms of damage at all times. All materials shall be stored in tightly covered unopened containers at a temperature range recommended by the manufacturer of the product.
b.Storage space for all materials shall be acceptable to the Engineer. Improper storage conditions may cause the rejection of the material stored therein.
855.03 Identification and Certification.
a.Each container shall bear a label on which shall be complete written instructions and precautions for use, the date of manufacture, the batch and/or lot number, the designation of the product, and recommended coating thickness. SECTION 855 COATINGS, PAINTS, ENAMELS, AND VARNISHES FOR METAL AND WOOD STRUCTURES
b.Each shipment of these materials shall be accompanied by written certification from the manufacturer stating that the material furnished complies with the applicable specifications. The certification shall show the designation of the product, the batch and/or lot number, and the project number.
c.Each system of inorganic zinc primer used on bolted connection surfaces (faying) shall be qualified in accordance with "Testing Method to Determine The Slip Coefficient For Coatings Used In Bolted Joints" as adopted by the Research Council On Structural Connections. This qualification is required for the systems shown on List III-1 in the Materials Sources and Devices with Special Acceptance Requirements manual. See Appendix A of Allowable Stress Design Specification For Structural Joints Using ASTM A 325 {A 325M} or ASTM A 490 {A 490M} Bolts published by the Research Council On Structural Connections. All inorganic zinc primers shall have a minimum slip coefficient of 0.33 unless shown otherwise on the bridge plans.
855.04 Resampling and Retesting.
Coating systems for structural steel will be approved on the basis of field testing as outlined in List III-1 of the Department's manual "Materials, Sources, and Devices with Special Acceptance Requirements". Components of each batch will be sampled at the project level or fabrication plant for selective verification testing of those parameters listed in the Procedure for List III-1. The right is reserved to inspect, resample, and retest any previously approved material at any time when it is deemed expedient by the Engineer. Materials stored in accordance with the recommendations of the manufacturer may be used at any time up to the expiration date printed on the material container. Materials not used prior to the expiration date must be retested and reapproved before their use will be allowed.
855.05 Coating Systems For Structural Steel.
The Department has established several types of coating systems according to the anticipated environmental conditions as well as the required surface preparation. The list is divided into various coating systems which have been approved for each of these types through actual field use or field and/or laboratory tests conducted by approved Governmental Agencies. These are multiple coat systems of production run materials from various coating manufacturers. This list is found in the Department's "Materials, Sources, and Devices with Special Acceptance Requirements" manual, List III-1. The requirements for the use of products from this list are found in its accompanying procedure. A copy of the list and its accompanying procedure are available from the Bureau of Materials and Tests. The following will apply when the condition exists where a coating system, produced by a manufacturer not initially listed on List III-1, is proposed for use: The manufacturer of the coating shall request that the Department approve the coating system according to the procedure referred to above. In lieu of the completed field test, the manufacturer shall be required to demonstrate to the Department that the system can be successfully applied. Upon demonstration of a successful application, the Department may give temporary approval to the coating system until time allows for the system to complete a performance field test. Upon successful completion of the field test, the coating system will be added to List III-1. The Department will monitor the applied coating system during this interim period (until field testing is complete) for any cracking, peeling, blistering, or loss of adhesion between the substrate or any layer which will be cause for revocation of the temporary approval. The required type of system will be specified on the contract plans for individual projects. Contractors may select any system listed from the specified type of system. Only systems on this list shall be furnished for use. Systems are comprised of multiple products representing the various coats required. Products must be used with their counterparts in that system only. Mixing of products from different systems will not be allowed. The number of coats is specified on the list. Coating thickness shall be as recommended by the producer of the material with conformance checked in accordance with standard SSPC-PA2. All coatings shall be applied in accordance with the manufacturer's recommendations using spray equipment suitable for the coating unless otherwise specified. To allow ease of visual inspection, the prime coat shall be a color to contrast the cleaned steel surface and each coat in the system shall be of a color which will contrast the other layers in contact with it. The topcoat for non-weathering steel shall be a green color matching Federal Standard 595 Chip 24272 unless otherwise specified. The topcoat for the partial painting of weathering steel shall be a SECTION 855 COATINGS, PAINTS, ENAMELS, AND VARNISHES FOR METAL AND WOOD STRUCTURES brown color matching Federal Standard 595 Chip 30045 unless otherwise specified. High solids aluminum mastic coatings will not be required to be colored, unless otherwise specified.
855.06 Timber and Wood Paints.
The following primer, second, and third coat paints shall meet the production specification indicated below. Unpainted work and old painted surfaces in poor condition shall be painted with one coat of primer FSS TT-P-25. These paints have different uses according to the area in which they are used and whether they are to be tested or not.
855.07 Primer (Wood).
FSS TT-P-25.
855.08 Outside White.
AASHTO M 70, Type 2.
855.09 Outside Black.
FSS TT-E-489. Intended for the top or finish coat on previously primed wood or metal.
855.10 Paint For Concrete and Masonry.
FSS TT-P-24. Type I - White only. Type II - Tint-base-white for tinting. Primarily intended to be used as a primer and finish coat on outside surfaces. It can be used inside over suitable primed concrete, brick, stucco, and similar surfaces except floors. The dried coat is an eggshell color.
855.11 Paint For Masonry.
FSS TT-P-19. Acrylic Emulsion Type, for exterior use.
855.12 Olive-Drab (Exterior).
FSS TT-P-81.
855.13 Green Exterior Paint.
FSS TT-E-489.
855.14 Enamel (Exterior).
FSS TT-E-489. Class A - Air-drying. Class B - Baking. This enamel gives a high-gloss finish to be used over previously primed smooth wood or metal surfaces. Color selection is wide. It is suitable for signs and automotive equipment.
855.15 Zinc Coating for Galvanization and Coating Repair.
The zinc coating used for the repair of damaged galvanization and the repair of zinc coatings shall be one of the coatings given under the classification "Zinc-Rich Coating for Repairing Galvanized Items or Zinc Coatings" shown in List III-1 "Coating Systems for Structural Steel."
855.16 Asphalt Varnish.
FSS-TT-V-51.
855.17 Shellac Varnish.
FSS TT-S-300.
855.18 Spar Varnish.
FSS TT-V-121.
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Source: 2026 Standard Specifications for Highway Construction, 2026 Edition. Pages 741–744 of 826. View official source ↗