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1032-1 CORRUGATED METAL CULVERT PIPE
(A) GENERAL:
Corrugated metal culvert pipe meeting all applicable requirements of these specifications will be accepted on Brand Certification based on the requirements of North Carolina Department of Transportation's Brand Certification Program for metal culvert pipe as outlined in the Departments Materials and Tests Manual. The Department reserves the right to remove a manufacturer of metal culvert pipe from the approved list in the event that the monitoring efforts indicated that non-specification material is being provided or tests procedures are not being followed.
1. The following types of steel and aluminum alloy pipe and all associated accessories may be accepted under this program.
a) Corrugated metal culvert pipe, pipe arches and underdrain.
b) Coated, paved and lined corrugated metal culvert pipe and pipe arches.
c) Corrugated metal end sections, coupling band, and other accessories and hardware.
d) Coated, Paved, and lined metal end sections, coupling bands and accessories.
e) Corrugated aluminum alloy structural plate pipe and pipe arches.
f) Welded steel pipe.
1032-2 CORRUGATED ALUMINUM ALLOY CULVERT PIPE.
(A) Corrugated Aluminum Alloy Culvert Pipe:
Corrugated aluminum alloy culvert pipe shall meet the requirements of AASHTO M196 except that Type IA pipe will not be permitted.
When elongated pipe is called for by the contract, the pipe shall be shop formed to provide for a 5 percent vertical elongation.
Coupling bands with projections may be used for circumferential pipe, helical pipe, or a combination of both.
(B) Corrugated Aluminum Alloy Flared End Sections:
Corrugated aluminum alloy flared end sections shall be in accordance with the details shown on the plans, and shall meet all applicable requirements of AASHTO M196.
(C) Corrugated Aluminum Alloy Pipe Tees and Elbows:
Corrugated aluminum alloy pipe tees and elbows shall meet all applicable requirements of AASHTO M196.
(D) Acceptance:
Acceptance of corrugated aluminum alloy culvert pipe, and its accessories will be based on, but not limited to, visual inspections, classification requirements, check samples taken from material delivered to the project, and conformance to the annual Brand Registration.
Culvert pipe materials not meeting the above requirements will be rejected, unless written approval is obtained from the State Materials Engineer.
1032-3 CORRUGATED STEEL CULVERT PIPE.
(A) Corrugated Steel Culvert Pipe and Pipe Arch:
Corrugated steel culvert pipe and pipe arch shall meet the requirements of AASHTO M36 with the following exceptions:
1. Coupling Bands:
a. Corrugated coupling bands shall be used except as may be otherwise provided below.
b. A hugger type corrugated band having one annular corrugation at each outside edge of the band will be acceptable.
c. Coupling bands with projections may be used where it is necessary to join new pipe to existing pipe having helical corrugations at the joint locations. An approved sealer shall be used with this type of coupling band.
d. Coupling bands shall be fastened on the ends with a minimum of two 1/2 inch bolts.
e. Annular corrugated bands shall have a minimum width of 10 1/2" where 2-2/3" by 1/2" corrugations are used.
2. Corrugations:
Where 1/4 inch deep corrugations are permitted by AASHTO M36, the maximum pitch of the corrugations shall be 1 7/8 inch.
Where 3" x 1" corrugations are required, the Contractor will also be permitted to use 125 mm. x 25 mm. (4.92" x 0.98") corrugations.
Pipe with helical corrugations shall have rerolled ends with a minimum of 2 annual corrugations at each end.
3. Elongated Pipe:
When elongated pipe is called for by the contract, the pipe shall be shop formed to provide for a 5 percent vertical elongation.
4. Lifting Straps:
The pipe may be furnished either with or without lifting straps for handling. The lifting straps shall be attached by bolting or by welding. Bolt holes for attaching the straps shall be a smooth hole which is either punched or drilled. No burning of holes will be permitted. The lifting straps shall be so designed that the holes can be plugged to prevent infiltration of backfill material.
5. Coating Repair
Repair of galvanizing shall be in accordance with Section 1076-6.
6. Type IA Pipe:
Type IA pipe will not be permitted.
7. Aluminized Pipe:
Aluminized pipe may be used in lieu of galvanized pipe. Aluminized pipe shall meet all requirements of Subarticle 10323(A) except that the pipe and coupling bands shall be fabricated from aluminum coated steel sheet meeting the requirements of AASHTO M274.
8. Marking Requirements:
Pipe sections and special attachments for pipe 60" or larger diameter pipe shall be alphamerically match-marked at the plant site before shipping.
(B) Corrugated Steel Flared End Sections:
Corrugated steel flared end sections shall be in accordance with the details shown on the plans, and shall meet all applicable requirements of Subarticle 10323(A). Flared end sections on which the spelter coating has been bruised or broken either in the shop or in shipping shall be repaired in accordance with AASHTO M36.
(C) Corrugated Steel Pipe Tees and Elbows:
Corrugated steel tees and elbows shall meet all applicable requirements of Subarticle 10323(A).
(D) Corrugated Steel Eccentric Reducers:
Corrugated steel eccentric reducers shall meet all applicable requirements of Subarticle 10323(A), and the additional requirements shown below.
The eccentric reducer shall be so constructed that the invert or flow line from the large pipe thru the reducer and into the small pipe is a continuous straight line.
The reducer shall be made from the same thickness corrugated metals as the large diameter pipe. The reducing section may be riveted or welded.
(E) Acceptance:
Acceptance of corrugated steel culvert pipe, and its accessories will be based on, but not limited to, visual inspections, classification requirements, check samples taken from material delivered to the project, and conformance to the annual Brand Registration.
Culvert pipe materials not meeting the above requirements will be rejected, unless written approval is obtained from the State Materials Engineer.
The reducing section shall reduce in diameter no more than 3 inches in 24 inches of length. A 24 inch long constant diameter stub shall be riveted or welded to each end of the reducing section to form the complete reducer.
The completed reducer shall show careful, finished workmanship in all particulars. Reducers on which the spelter coating has been bruised or broken either in the shop or in shipping shall be repaired in accordance with AASHTO M36. Reducers which show defective workmanship will be rejected. The following defects are considered to be evidence of poor workmanship, and the presence of any of them in any individual reducer will constitute sufficient cause for rejection:
1. Not meeting required dimensions.
2. Not of the specified shape.
3. Uneven laps.
4. Ragged or diagonal sheared edges.
5. Loose, unevenly lined or spaced rivets.
6. Poorly formed rivet heads.
7. Lack of rigidity.
8. Dents or bends in the metal itself.
9. Uneven welds.
10. Gaps in welds.
1032-4 COATED, PAVED, AND LINED CORRUGATED STEEL CULVERT PIPE.
(A) Bituminous Coated Corrugated Steel Culvert Pipe and Pipe Arch:
(1) Type A -- Fully Bituminous Coated:
The pipe and pipe arch shall meet the requirements of Subarticle 10323(A) and shall be bituminous coated in accordance with the requirements of AASHTO M190 for Type A pipe. Coupling bands shall not be coated.
(2) Type B -- Half Bituminous Coated and Partially Paved:
The pipe and pipe arch shall meet the requirements of Subarticle 10323(A) and shall be half bituminous coated and partially paved in accordance with the requirements of AASHTO M190 for Type B pipe. Coupling bands shall not be coated.
(3) Type C -- Fully Bituminous Coated and Partially Paved:
The pipe and pipe arch shall meet the requirements of Subarticle 10323(A) and shall be fully bituminous coated and partially paved in accordance with the requirements of AASHTO M190 for Type C pipe. Coupling bands shall not be coated.
(4) Type D -- Fully Bituminous Coated and Fully Paved:
The pipe and pipe arch shall be fully bituminous coated and fully paved as provided for Type C except that the pavement shall extend for the full circumference of the inside of the pipe. The inside diameter after paving shall not be less than 98 percent of the nominal diameter of the pipe. Coupling bands shall not be coated.
(B) Bituminous Coated Corrugated Steel Flared End Sections:
Bituminous coated corrugated steel flared end sections shall be in accordance with the details shown on the plans, and shall meet all applicable requirements of Subarticle 10324(A). Flared end sections on which the spelter coating has been bruised or broken either in the shop or in shipping shall be repaired in accordance with AASHTO M36. The pipe connector section shall be bituminous coated to match the adjacent pipe. Bituminous coating will not be required on the skirt section.
(C) Bituminous Coated Corrugated Steel Pipe Tees and Elbows:
Bituminous coated corrugated steel tees and elbows shall meet all applicable requirements of Subarticle 10324(A).
(D) Bituminous Coated Corrugated Steel Eccentric Reducers:
Bituminous coated corrugated steel eccentric reducers shall meet all applicable requirements of Subarticle 10323(D) and shall be bituminous coated as called for in Subarticle 10324(A).
(E) Optional Coatings for Bituminous Coated Pipe or Pipe Arch:
A polymeric coating meeting the requirements of AASHTO M246 for Type B coating will be acceptable in lieu of bituminous coating wherever Type A fully bituminous coated corrugated steel culvert pipe or pipe arch is called for by the contract.
Pipe meeting the applicable requirements of Subarticle 10323(A) for aluminized pipe may be substituted for bituminous coated galvanized steel culvert pipe as provided in paragraphs 1 through 5 below, except that paragraphs 1, 2, and 3 shall not apply in the counties of Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret, Chowan, Columbus, Craven, Currituck, Dare, Gates, Hertford, Hyde, Jones, Martin, New Hanover, Onslow, Pamlico, Pasquotank, Pender, Perquimans, Tyrrell, and Washington.
1. In lieu of Type A, Fully Bituminous Coated galvanized pipe, aluminized pipe without a bituminous coating, may be used.
2. In lieu of Type B, Half Bituminous Coated and Partially Paved galvanized pipe, Type B aluminized pipe may be used. Type B aluminized pipe is aluminized pipe which has been half bituminous coated and partially paved as required by Subarticle 10324(A)(2).
3. In lieu of Type C, Fully Bituminous Coated and Partially Paved galvanized pipe, Type B aluminized pipe may be used.
4. In lieu of Type D, Fully Bituminous Coated and Fully Paved galvanized pipe, Type D aluminized pipe may be used. Type D aluminized pipe is aluminized pipe which has been fully bituminous coated and fully paved as required by Subarticle 10324(A)(4).
5. The above provisions pertaining to the substitution of aluminized pipe for galvanized pipe will also apply to the substitution of aluminized pipe arch, flared end sections, tees, elbows, and eccentric reducers for galvanized pipe arch, flared end sections, tees, elbows, and eccentric reducers.
(F) Concrete Lined Corrugated Steel Culvert Pipe:
Concrete lined corrugated steel culvert pipe, tees, and elbows shall be fully concrete lined for the full circumference of the inside of the pipe and shall meet the requirements of ASTM A849 for Type C-3 pipe. The inside diameter after lining shall not be less than 98% of the nominal diameter of the pipe. The pipe, tees, and elbows before coating shall meet the requirements of Article 10323.
(G) Acceptance:
Acceptance of coated, paved, and lined corrugated steel culvert pipe, and its accessories will be based on, but not limited to, visual inspections, classification requirements, check samples taken from material delivered to the project, and conformance to the annual Brand Registration.
Culvert pipe materials not meeting the above requirements will be rejected, unless written approval is obtained from the State Materials Engineer.
1032-5 CORRUGATED STEEL STRUCTURAL PLATE PIPE AND PIPE ARCH.
The plate and fasteners for corrugated steel structural plate pipe and pipe arch shall meet the requirements of AASHTO M167.
When elongated pipe is called for by the contract, the pipe shall be shop formed to provide for a 5 percent elongation.
Unless otherwise required by the plans or special provisions, bolt holes along those edges of the plates that form longitudinal seams in the finished structure shall be in 2 rows spaced 2 inches apart. The bolt holes shall be spaced a maximum of 6 inches apart.
Bolt holes along those edges of the plates that form circumferential seams in the finished structure shall be spaced a maximum of 12 inches apart.
The minimum distance from the center of any bolt hole to the edge of the plate shall be not less than 1 3/4 times the diameter of the bolt. The diameter of bolt holes in longitudinal seams, excepting those at plate corners, shall not exceed the bolt diameter by more than 1/8 inch. The diameter of holes in circumferential seams, including those at plate corners, shall not exceed the bolt diameter by more than 1/2 inch and the average of the diameter on the major and minor axes shall not exceed the bolt diameter by more than 1/4 inch.
Plates for forming skewed or sloped ends shall be cut so as to give the required angle of skew or slope. Burned edges shall be free from oxide and burrs and shall present a workmanlike finish. Damaged spelter coating around cut or burned edges shall be repaired as required by AASHTO M36. An erection drawing shall be furnished for each installation. Each plate shall be marked as necessary to insure proper placement in the structure.
(A) Acceptance:
Acceptance of corrugated steel structural plate pipe and pipe arches, and its accessories will be based on, but not limited to, visual inspections, classification requirements, check samples taken from material deliveredto the project, and conformance to the annual Brand Registration. Culvert pipe materials not meeting the above requirements will be rejected unless written approval is obtained from the State Materials Engineer.
1032-6 CORRUGATED ALUMINUM ALLOY STRUCTURAL PLATE PIPE AND PIPE ARCH.
The plate and fasteners for corrugated aluminum alloy structural plate pipe and pipe arch shall meet the requirements of AASHTO M219.
When elongated pipe is called for by the contract, the pipe shall be shop formed to provide for a 5 percent elongation.
Unless otherwise required by the plans or special provisions, bolt holes along the plate edges that will form longitudinal seams in the finished structure shall be in 2 rows 1 3/4 inches apart and located in the valley end in the crest of each corrugation.
The minimum distance from the center of bolt holes to edge of plates shall be not less than 1 3/4 times the bolt diameter. Bolt holes along those edges of the plates that form circumferential seams in the finished structure shall be spaced a maximum of 10 inches apart.
The diameter of bolt holes in longitudinal seams, excepting those at plate corners, shall not exceed the bolt diameter by more than 1/8 inch. The diameter of holes in circumferential seams, including those at plate corners, shall not exceed the bolt diameter by more than 1/2 inch and the average of the diameters on the major and minor axes shall not exceed the bolt diameter by more than 1/4 inch.
Plates for forming skewed or beveled ends of structures shall be accurately cut to form the required final shape. Plates shall be saw cut, not burned, and shall present a workmanlike finish free from notches or gouges.
An erection drawing shall be furnished for each installation. Each plate shall be marked as necessary to insure proper placement in the structure.
(A) Acceptance:
Acceptance of corrugated aluminum alloy structural plate pipe and pipe arches, and its accessories will be based on, but not limited to, visual inspections, classification requirements, check samples taken from material delivered to the project, and conformance to the annual Brand Registration.
Culvert pipe materials not meeting the above requirements will be rejected unless written approval is obtained from the State Materials Engineer.
1032-7 VITRIFIED CLAY CULVERT PIPE.
Vitrified clay culvert pipe shall meet the requirements of AASHTO M65 for extra-strength clay pipe.
When vitrified clay pipe sections have been inspected and accepted they will be stamped with the Department seal of approval. No pipe section shall be used which does not have this seal of approval.
Joint material shall meet the requirements of Subarticle 10321(F).
(A) Welded steel pipe shall meet the requirements of ASTM A139 for the grade of pipe called for on the plans.
(B) Acceptance:
Acceptance of welded steel culvert pipe, and its accessories will be based on, but not limited to, visual inspections, classification requirements, check samples taken from material delivered to the project, and conformance to the annual Brand Registration.
Culvert pipe materials not meeting the above requirements will be rejected, unless written approval is obtained from the State Materials Engineer.
(A) Plain Concrete Culvert Pipe:
Plain concrete culvert pipe shall meet all applicable requirements of AASHTO M170 except as follows:
1. It shall not be reinforced.
2. The maximum weighted average loss for both coarse and fine aggregates shall be 15% when subjected to 5 cycles of the soundness test.
3. The maximum percentage of wear for coarse aggregates shall be 55%.
Plain concrete culvert pipe shall meet the minimum requirements for Class II Wall A pipe except that the D-load to produce the ultimate load shall be 1,000 pounds.
(B) Reinforced Concrete Culvert Pipe:
Reinforced concrete culvert pipe shall meet the requirements of AASHTO M170 for the class of pipe called for on the plans except as follows:
1. The permissible wall thickness outside of the joint configuration shall not be more than that shown in the design by more than 5% or 3/16 inch, whichever is greater.
2. The maximum weighted average loss for both fine and coarse aggregates shall be 15% when subjected to 5 cycles of the soundness test.
3. The maximum percentage of wear for coarse aggregates shall be 55%.
The design wall thickness shall be either the wall thickness shown in AASHTO M170 for the applicable class and wall or the wall thickness shown in a modified design which has been approved by the Engineer. A wall thickness greater than permitted by the above tolerance will be cause for rejection of the pipe. The circumferential steel in single cage pipe shall not be more than 3 inches from either end of the pipe section excluding the tongue and groove. On double cage pipe one cage shall extend into the tongue or groove. The other cage shall be placed so that a circumferential wire shall be not less than 2 inches from the other end of the barrel of the pipe.
(C) Concrete Flared End Sections:
Concrete flared end sections shall meet all applicable requirements of AASHTO M170 and Section 1077 except those pertaining to design.
The design of concrete flared end sections shall be in accordance with the plans, or with plans prepared by the manufacturer which have been approved by the Engineer. All concrete flared end sections shall be reinforced. The concrete used in flared end sections shall be air entrained and shall attain a strength of 3500 psi when tested in accordance with AASHTO T22.
Concrete flared end sections with hinged grates shall meet the above requirements and shall also have provisions made for mounting the hinged grate as shown on the plans. The hinged grate shall meet the requirements of the plans and Article 10748.
(D) Concrete Pipe Tees and Elbows:
Concrete pipe tees and elbows shall meet all applicable requirements of AASHTO M170 for the class of pipe tee or elbow called for on the plans.
(E) Marking:
The following information shall be clearly marked on each section of pipe, flared end section, tee, and elbow:
1. The pipe class and type of wall if reinforced.
2. The date of manufacture.
3. Name or trademark of the manufacturer.
When concrete pipe, flared end sections, tees, and elbows have been inspected and accepted they will be stamped with the Department seal of approval. No pipe sections, flared end sections, tees, or elbows shall be used which does not have this seal of approval. Failure of as much as 20 percent of any lot of pipe due to cracks, fractures, variation in alignment, or other manufacturing defects will be cause for the rejection of the entire lot. The lots shall be as designated by the manufacturer prior to inspection. Individual lengths of pipe within the lot which were not specifically rejected but which are considered acceptable by the manufacturer may be removed from the rejected lot and resubmitted for inspection as a separate lot.
(F) Joint Materials:
Cement shall meet the requirements of Article 10241. Sand shall meet the requirements of Article 10141 for fine aggregate or Article 10406 for mortar sand. Hydrated lime shall meet the requirements of Article 10405.
Flexible plastic joint material shall meet the requirements of AASHTO M198 for Type B flexible plastic gaskets, except as follows:
1. The flash point, C.O.C., shall be a minimum of 325F.
2. The fire point, C.O.C., shall be a minimum of 350F.