Drainage User Manual  

*  Cleveland Open Cup method, ASTM D 92                         

1. Basic Materials Properties

 

Corrugated HDPE pipe is designated in one of two ways:  Single-wall or Double-wall, and is to be manufactured in accordance with AASHTO M 252 or M 294 standards. (See Article 1032-7)​  Single-wall (Type C) has one single corrugated wall and comes in diameters of 3" thru 10". Type C HDPE pipe is used for temporary slope drain and subsurface drains. Double-wall (Types S & D) has two walls, a corrugated outer wall and a smooth inner liner, and comes in diameters of 12" thru 60".  Only Type S or Type D HDPE pipe is allowed for locations under traffic.

 

2. Specific Acceptance Requirements

 

Corrugated HDPE pipe material must come from an approved producer who is on the NCDOT Brand Registration Program for Plastic Pipe. The current listing of approved plastic pipe producers can be found on the Department’s Vendor System and web page at:  

 

https://apps.ncdot.gov/vendor/approvedproducts/Default.aspx

                                  

Each shipment of pipe must be accompanied by a matching Bill of Lading (BOL) listing all of the pipe contained within that shipment.

 

NCDOT personnel must determine if Quality Control (QC) stickers are on each length of pipe in the shipment.

 

 

NCDOT personnel can reject any shipments that do not have QC stickers on 100% of the pipe.  Please alert your local Section Materials Specialist if shipments show up at the job without the required QC stickers.

 

When corrugated HDPE pipe arrives on a job site, it must be visually inspected by NCDOT personnel.  The NCDOT personnel will insure that the pipe has not been damaged during shipment.  NCDOT personnel can reject any material damaged in shipment.

 

If questions do arise concerning the acceptability of materials, please notify your local Section Materials Specialist for assistance.

 

3. Coupling

 

The coupling system shall provide a soil-tight joint meeting the requirements of AASHTO M 294, Section 7.8.  When bell and spigot couplers are utilized, gaskets meeting the requirements of ASTM F 477 shall be used.  Care should be taken to limit the amount of movement after the pieces are coupled together.  Excessive movement of the coupled joint may cause slippage of the coupling system or the pipe itself. Furthermore, excessive bending of the joined pipe can cause the system to bend or deform permanently thereby resulting in exfiltration or infiltration.

1. Basic Materials Properties

 

PVC Profile Wall Drain Pipe material shall meet the product specifications of AASHTO M304 and shall have a smooth interior.  PVC Profile Wall Drain pipe ranges in size from 4" - 48".

 

2. Specific Acceptance Requirements

 

PVC Profile Wall Drain pipe material must come from an approved producer who is on the NCDOT Brand Registration Program for Plastic Pipe. The current listing of approved plastic pipe producers can be found on the Department’s Vendor System and web page at: 

 

https://apps.ncdot.gov/vendor/approvedproducts/Default.aspx

 

Each shipment of pipe must be accompanied by a matching Bill of Lading (BOL) listing all of the pipe contained within that shipment.

 

NCDOT personnel must determine if Quality Control (QC) stickers are on each length of pipe in the shipment.

 

​

 

NCDOT personnel can reject any shipments that do not have QC stickers on 100% of the pipe.  Please alert your local Section Materials Specialist if shipments show up at the job without the required QC stickers.

 

When PVC Profile Wall Drain pipe arrives on a job site, it must be visually inspected by NCDOT personnel.  The NCDOT personnel will insure that the pipe has not been damaged during shipment.  NCDOT personnel can reject any material damaged in shipment.

 

If questions do arise concerning the acceptability of materials, please notify your local Section Materials Specialist for assistance.

 

3. Coupling

 

The coupling system shall provide a water-tight joint meeting the requirements of AASHTO M304, Section 7.6 and (Article 1032-8).  Care should be taken to limit the amount of movement after the pieces are coupled together. Excessive movement of the coupled joint may cause slippage of the coupling system or the pipe itself.  Furthermore, excessive bending of the joined pipe can cause the system to bend or deform permanently thereby resulting in exfiltration or infiltration.

1. Basic Materials Properties

 

Corrugated steel pipe is fabricated from coils of flat steel that have been coated with either zinc or aluminum to prevent corrosion. Corrugated steel pipe should conform to the requirements of AASHTO M 36.  Corrugated steel pipe is specified based on its inside diameter, corrugation pattern, and the thickness of the steel sheet used. Also, the term gage may be used to describe the thickness of the steel. With gage, the larger the number, the thinner the metal.

 

Elongated Pipe:  Some installations call for pipe that has been elongated in the vertical direction by 5%.  This is done to take into account the deflection that will occur in the pipe once backfilling is complete and thus retaining a circular cross section for the culvert.

 

Pipe Arch:  This is a specific type of corrugated steel pipe used when fill heights are restricted.

 

Spiral Rib Pipe: This type of metal pipe has a full circular crosssection with a single thickness of smooth sheet, fabricated with helical ribs formed by a continuous lock seam.  Spiral rib pipe must meet the requirements of the Type IR classification of AASHTO M 36.

 

2. Specific Acceptance Requirements

 

Corrugated steel pipe material must come from an approved producer who is on the NCDOT Brand Registration Program for Metal Pipe. The current listing of approved metal pipe producers can be found on the Department’s Vendor System and web page at: 

 

https://apps.ncdot.gov/vendor/approvedproducts/Default.aspx

 

Each shipment of pipe must be accompanied by a matching Bill of Lading (BOL) listing all of the pipe contained within that shipment.

 

NCDOT personnel must determine if Quality Control (QC) stickers are on at least 25% of the pipe per shipment.

 

 ​

 

NCDOT personnel can reject any shipments that do not have QC stickers on at least 25% of the pipe.  Please alert your local Section Materials Specialist if shipments show up at the job without the required amount of QC stickers.

 

When corrugated metal pipe arrives on a job site, it must be visually inspected by NCDOT personnel.  The NCDOT personnel will insure that the pipe has not been damaged during shipment.  NCDOT personnel can reject any material damaged in shipment.  After delivery, but prior to installation, all corrugated metal pipe must be inspected by Materials and Tests technicians for coating thickness. NCDOT personnel should notify their local Materials and Tests technician for inspection when corrugated metal pipe is received on a job site or at the maintenance yard.

 

3. Coupling

 

Coupling bands for corrugated steel culvert pipe shall meet the requirements of AASHTO M 36 with the following exceptions as noted in Section 1032-3(A) of the Standard Specifications: 

 

a. Use corrugated coupling bands 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.  Use an approved sealer with this type of coupling band. 

 

d. Fasten coupling bands on the ends with a minimum of two 1/2" (12.7 mm) bolts. 

 

e. Annular corrugated bands must have a minimum width of 10 1/2" (266.7 mm) where 2-2/3" (67.7 mm) by 1/2" (12.7 mm) corrugations are used.