945ALUMINUM PIPE, INCLUDING UNDERDRAIN, PIPE ARCH AND STRUCTURAL PLATE PIPE AND PIPE ARCH

945-1 General Requirements.

Aluminum -alloy culvert pipe and underdrains shall meet the requirements of AASHTO M 196 and shall include plant certification from the National Transportation Product Evaluation Program (NTPEP) and compliance with the additional provisions contained herein. Except for underdrain, corrugated aluminum pipe including pipe arch shall be fabricate d with helical corrugations with a minimum of two annular corrugations formed into each end of each pipe to accommodate a coupling band. Annular fabrication is not permitted unless specifically called for in the Plans or specifications. Provide , as part of the shipping ticket, the actual mean inside diameter and total measured lengths of each lot of pipe shipped to the project . Include the minimum and maximum inside diameters used to calculate the actual mean inside diameter. For sidedrains, unless shown o therwise in the Plans the minimum thickness of the metal shall be as specified below. Alternatively, if no future maintenance concerns exist, the Contractor may propose the pipe gage based on the Department’s Drainage Manual and Culvert Service Life Estimator for approval by the Engineer. Table 945-1 Thickness of Metal for Sidedrain Pipe Nominal Diameter or Equivalent (inches) Sheet Gauge No. Mean Thickness of Metal (inches) 6 18 0.048 8 16 0.060 10 16 0.060 12 16 0.060 15 16 0.060 18 16 0.060 21 16 0.060 24 16 0.060 30 14 0.075 36 14 0.075 42 12 0.105 48 12 0.105 54 12 0.105 60 10 0.135 66 10 0.135 72 and over 8 0.164 Where bituminous coated aluminum pipe is specified the bituminous coating shall meet the requirements as specified for corrugated steel pipe in 943 -5. Bituminous coated and paved aluminum pipe shall meet the additional requirements specified in 943 -6 and 943 -7, as applicable. Class IV pipe shall not be u sed. FY 2023-24 Return to Table of Contents

945-2 Aluminum Alloy Structural Plate Pipe, Pipe Arch and Arches.

945-2.1 General Requirements: Aluminum alloy structural plate pipe, pipe arch, and

arches shall conform to AASHTO M 219, with the exceptions and additions specified herein. The nominal thickness of the plate shall be as shown in the Plans.

945-2.2 Bolts and Nuts: In lieu of shaped bolts and nuts, standard type bolts and nuts,

with special shaped washers, may be used. F or aluminum bolts and nuts the material shall conform to the chemical requirements shown in Table I of ASTM B211, for Alloy 6061. Nuts shall be lubricated at the factory, with a suitable wax compound. The bolts may be sampled and tested before erection or may be accepted on the basis of the manufacturer’s certification. For steel bolts and nuts, the material shall meet the requirements of either ASTM A307 or ASTM F3125, Grade A325, as appropriate, and shall be hot double -dipped galvanized. Aluminized stee l bolts, or other equally suitable devices for connecting the plates, may be used if approved by the Engineer.

945-2.3 Certification of Tests: Submit to the Engineer, prior to installation, a certified

mill analysis and certification verifying that the aluminum parts and components are of the alloys specified and comply with the requirements of this Section.

945-2.4 Direct Purchases by the Department: The provisions of 944 -9 shall also apply

to Departmental purchases of aluminum alloy structural plate pip e, pipe arches and arches.

945-2.5 Pipe Markings: In lieu of the coined markings required by AASHTO M 196,

Section 14, information may be ink stamped on the pipe at the time of manufacture. A QC label with the pipe fabricator’s identity, the date of corru gating or forming into pipe, and the date of final QC inspection shall be applied to the inside walls of pipe using indelible ink. The pipe markings must be clearly legible upon arrival at the jobsite and at the time of installation. Pipe with illegible or incomplete markings may be rejected. FY 2023-24 Return to Table of Contents SECTION 946 CAST IRON PIPE

946-1 Cast Iron Culvert Pipe.

Cast iron culvert pipe of diameter 12 inches and over shall conform with the requirements of AASHTO M 64, including the requirements for the coating as specified in Article 7.1. Cast iron culvert pipe smaller than 12 inches in diameter shall meet ANSI A21.51, and the joints shall meet ANSI A21.11. Unless a particular type or class of pipe is designated in the plans the Contractor may furnish any class included in the above specifications. Only one class or type shall be furnished for any one Contract. The pipe shall be smooth bore pipe.

946-2 Cast Iron Soil Pipe.

Cast iron soil pipe, for roof drains or for other purposes where such pipe is designated, shall meet the requirements of either of the following: