944-1 Description.
This Section covers the materials for corrugated galvanized steel structural plate pipe and pipe arch, including the necessary bolts and nuts for connecting plates and for assembling the pipe or pipe arch at the point of destination when so specified. The sizes of the pipe or pipe arch shall be as shown in the Plans.
944-2 Materials.
Structural plate pipe and pipe arch shall be of galvanized steel, complying with the requirements of AASHTO M 167, with the additional requirement that the minimum thickness of the plates shall be as shown in the Plans.
944-3 Tolerance in Span and Height.
A tolerance of plus or minus 4% will be allowed in the specified span and height of pipe arches. A tolerance of minus 2 inches to plus 4 inches will be allowed in the specified diameter of round pipe.
944-4 Bituminous Coating.
When bituminous coating is specified, all plates shall be fully coated on both sides with asphalt cement. The bituminous coating shall co nform to the requirements of AASHTO M 190, for Type A.
944-5 Mill Analysis and Guarantee.
Six certified copies of Mill Analysis and Guarantee shall be furnished to the Engineer, and acceptance of the pipe will be based on such reports.
944-6 Assembly Diag rams.
Diagrams for assembling shall be furnished unless the pipe or pipe arch is furnished completely assembled.
944-7 Fabrication.
The fabrication of the pipe and pipe arch shall comply with the applicable requirements of Section 23, of the AASHTO LRFD Bridge Construction Specifications. Unless otherwise specified, the pipe and pipe arch shall be of full section for the entire length.
944-8 Assembly.
When purchase contracts stipulate that the pipe be assembled, the dealer shall furnish the pipe and pipe arch completely assembled at the point of destination, or at the site, as specified, and in lengths as specified.
944-9 Direct Purchases by the Department.
When the Department purchases the pipe or pipe arch direct from the dealer, the quantity to be paid for shall be the number of feet of pipe and of pipe arch, as ordered, provided that sufficient materials meeting the requirements of these specifications shall be furnished to construct the pipe and pipe arch of the length and sizes shown. FY 2023-24 Return to Table of Contents The quantity shall be the net length as ordered, with no allowance for length in excess thereof. The price per foot for direct purchases shall be full compensation for furnishing the complete materials for the pipe or pipe arch, including all bolts and nuts required f or connecting the plates. When assembling of the pipe or pipe arch is specified, such price shall also include all labor, equipment, tools and incidentals required for completely assembling the pipe or pipe arch. FY 2023-24 Return to Table of Contents SECTION 945 ALUMINUM 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