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The work covered by this section consists of furnishing and installing corrugated steel structural plate pipe and pipe arch of the size and gage called for on the plans at locations indicated on the plans or designated by the Engineer and to the lines and grades established by the Engineer. The work shall also include the construction of such joints and connections to other pipes, endwalls, and other drainage structures as may be necessary to complete the work shown on the plans.
All materials shall meet the requirements of Division 10 shown below:
Corrugated steel structural plate pipe and pipe arch Article 1032-5
Metal pipe culverts, fittings, and all other accessories covered by this section shall be furnished by a supplier who has met the requirements of the Departments Brand Certification program for metal culvert pipes, and is listed on the Departments pre-approved list for suppliers of metal culvert pipe.
(A) Excavation, Bedding, and Backfilling:
The provisions of Section 300 will be applicable to the excavation, bedding, and backfilling of structural plate pipe and pipe arch except that a minimum of 5 inch thickness of bedding material shall be placed in accordance with the details shown in the plans.
(B) Erection:
Erection shall be in accordance with the manufacturer's assembly diagrams and instruction sheets. All erection procedures and methods shall meet with the approval of the Engineer. All structural plate shall be handled with reasonable care. The plate shall not be dragged or skidded. If the spelter coating has been broken during handling or backfilling operations, the plate or the assembled pipe or pipe arch will be rejected, or shall be repaired as directed by the Engineer.
The entire pipe line shall be completely assembled before any backfill is placed, unless otherwise permitted by the Engineer. Elongated pipe shall be erected with the long diameter in a vertical position. Should spiraling occur during erection, the bolts shall be loosened and the pipe assembly adjusted to the correct position.
All bolting shall be done in a careful and workmanlike manner in accordance with the procedures specified by the manufacturer and approved by the Engineer before backfill is placed. All nuts shall be tightened to a minimum of 100 foot-pounds and a maximum of 200 foot-pounds of torque. Nut tightness shall be checked with a properly calibrated torque wrench before, during, and after backfill is placed.
Where necessary, the invert grade shall be cambered by an amount sufficient to prevent the development of sag or back slope in the flow line. The amount of camber used will be determined by the Engineer.
(C) Workmanship:
First class workmanship shall be used in installing the pipe and pipe arch. Evidence of defective workmanship shall include but not be limited to the following:
1. Uneven laps.
2. Improper shaping.
3. Variation from a straight center line.
4. Ragged edges.
5. Loose, unevenly lined or spaced bolts.
6. Illegible identification stamp on any plate.
7. Bruised, scaled or broken spelter coating.
8. Dents or bends in the metal itself.
Defective workmanship may constitute sufficient cause for rejection of the completed or partially completed work, or of any materials proposed for use in the work.
The quantity of corrugated steel structural plate pipe or pipe arch to be paid for will be the actual number of linear feet of pipe or pipe arch, measured along the flow line of the pipe or pipe arch to the nearest foot, which has been completed and accepted.
The quantities of pipe and pipe arch, measured as provided in Article 3284, will be paid for at the contract unit prices per linear foot for the various sizes of corrugated steel structural plate pipe and pipe arch shown below.
Payment for foundation conditioning will be made as provided in Subarticle 3009(A).
Payment for providing select material will be made as provided in Subarticle 3009(B).
Payment for providing the bedding material will be made as provided in Subarticle 3009(C).
The above prices and payments will be full compensation for all work covered by this section, including but not limited to furnishing, hauling, and erecting all pipe and pipe arch, and other materials; furnishing sand or stone screenings for the bedding blanket; all excavation, bedding and backfill; and cleaning out installed pipe.
Payment will be made under:
_________Inch C.S. Structural Plate Pipe, __________Gage Linear Foot
_________Inch C.S. Structural Plate Pipe, _________Gage, Elongated Linear Foot
_________Inch x ________Inch C.S. Structural Plate
Pipe Arch, ________Gage Linear Foot