33 31 11 - PUBLIC SANITARY SEWERAGE GRAVITY PIPING

Herbert, Rowland & Grubic, Inc. 33 31 11 - 1 007297.0445

SECTION 33 31 11 - PUBLIC SANITARY SEWERAGE GRAVITY PIPING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Sanitary sewerage piping.

2. Connection to existing manholes.

3. Wye branches and tees.

4. Sanitary laterals.

5. Pile support systems.

6. Bedding and cover materials.

B. Related Requirements:

1. Section 31 05 13 - Soils for Earthwork: Soils for backfill in trenches.

2. Section 31 05 16 - Aggregates for Earthwork: Aggregate for backfill in trenches.

3. Section 31 23 16 - Excavation: Product and execution requirements for excavation and backfill required by this Section.

4. Section 31 23 16.13 - Trenching: Execution requirements for trenching required by this Section.

5. Section 31 23 23 - Fill: Requirements for backfilling as required by this Section.

6. Section 33 05 05.43 - Mandrel Testing: Deflection testing of plastic sewerage piping.

7. Section 33 05 61 - Concrete Manholes and Inlets: Manholes and Inlets for sewerage piping.

8. Section 33 05 97 - Identification and Signage for Utilities: Pipe markers.

1.2 DEFINITIONS

A. Bedding: Fill placed under, beside, and directly over pipe, prior to subsequent backfill operations.

B. EPDM: Ethylene-propylene-diene terpolymer.

1.3 REFERENCE STANDARDS

A. American Association of State Highway and Transportation Officials:

1. AASHTO T 180 - Standard Method of Test for Moisture-Density Relations of Soils

Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop.

B. American Water Works Association:

1. AWWA C104 - Cement-Mortar Lining for Ductile-Iron Pipe and Fittings.

2. AWWA C105 - Polyethylene Encasement for Ductile-Iron Pipe Systems.

3. AWWA C110 - Ductile-Iron and Gray-Iron Fittings.

4. AWWA C111 - Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings.

5. AWWA C150 - Thickness Design of Ductile-Iron Pipe.

6. AWWA C151 - Ductile-Iron Pipe, Centrifugally Cast.

Herbert, Rowland & Grubic, Inc. 33 31 11 - 2 007297.0445

7. AWWA C153 - Ductile-Iron Compact Fittings.

C. ASTM International:

1. ASTM A74 - Standard Specification for Cast Iron Soil Pipe and Fittings.

2. ASTM C14 - Standard Specification for Nonreinforced Concrete Sewer, Storm

Drain, and Culvert Pipe.

3. ASTM C76 - Standard Specification for Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe.

4. ASTM C443 - Standard Specification for Joints for Concrete Pipe and Manholes, Using Rubber Gaskets.

5. ASTM C564 - Standard Specification for Rubber Gaskets for Cast Iron Soil Pipe and

Fittings.

6. ASTM C923 - Standard Specification for Resilient Connectors Between Reinforced

Concrete Manhole Structures, Pipes, and Laterals.

7. ASTM D698 - Standard Test Method for Laboratory Compaction Characteristics of

Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3).

8. ASTM D1557 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3).

9. ASTM D1785 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120.

10. ASTM D2235 - Standard Specification for Solvent Cement for Acrylonitrile-

Butadiene-Styrene (ABS) Plastic Pipe and Fittings.

11. ASTM D2321 - Standard Practice for Underground Installation of Thermoplastic

Pipe for Sewers and Other Gravity-Flow Applications.

12. ASTM D2466 - Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe

Fittings, Schedule 40.

13. ASTM D2564 - Standard Specification for Solvent Cements for Poly(Vinyl Chloride)

(PVC) Plastic Piping Systems.

14. ASTM D2729 - Standard Specification for Poly(Vinyl Chloride) (PVC) Sewer Pipe and Fittings.

15. ASTM D2751 - Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS)

Sewer Pipe and Fittings.

16. ASTM D2855 - Standard Practice for Making Solvent-Cemented Joints with

Poly(Vinyl Chloride) (PVC) Pipe and Fittings.

17. ASTM D3034 - Standard Specification for Type PSM Poly(Vinyl Chloride) (PVC)

Sewer Pipe and Fittings.

18. ASTM D6938 - Standard Test Method for In-Place Density and Water Content of

Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth).

19. ASTM F477 - Standard Specification for Elastomeric Seals (Gaskets) for Joining

Plastic Pipe.

1.4 SUBMITTALS

A. Section 01 33 00 - Submittal Procedures: Requirements for submittals.

B. Product Data: Submit manufacturer catalog cuts and other information indicating proposed materials, accessories, details, and construction information.

Herbert, Rowland & Grubic, Inc. 33 31 11 - 3 007297.0445

C. Test and Evaluation Reports: Submit reports indicating field tests made and results obtained.

D. Manufacturer Instructions:

1. Indicate special procedures required to install specified products.

E. Source Quality-Control Submittals: Indicate results of shop tests and inspections.

F. Field Quality-Control Submittals: Indicate results of Contractor-furnished tests and inspections.

1.5 CLOSEOUT SUBMITTALS

A. Project Record Documents: Record invert elevations and actual locations of pipe runs, connections, manholes, and cleanouts.

B. Identify and describe unexpected variations to subsoil conditions or discovery of uncharted utilities.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Section 01 61 00 - Product Requirements: Requirements for transporting, handling, storing, and protecting products.

B. Inspection: Accept materials on Site in manufacturer's original packaging and inspect for damage.

C. Storage:

1. Store materials according to manufacturer instructions.

2. Store valves in shipping containers with labeling in place.

D. Protection:

1. Protect materials from moisture and dust by storing in clean, dry location remote from construction operations areas.

2. Block individual and stockpiled pipe lengths to prevent moving.

3. Provide additional protection according to manufacturer instructions.

1.7 EXISTING CONDITIONS

A. Field Measurements:

1. Verify field measurements prior to fabrication.

2. Indicate field measurements on Shop Drawings.

PART 2 - PRODUCTS

2.1 GENERAL

A. All specials and every length of pipe shall be marked with the manufacturer's name or trademark, size, class, and the date of manufacture. Special care in handling shall be

Herbert, Rowland & Grubic, Inc. 33 31 11 - 4 007297.0445 exercised during delivery, distribution, and storage of pipe to avoid damage and unnecessary stresses:

1. Damaged pipe will be rejected and shall be replaced at the Contractor’s expense.

2. Pipe and specials stored prior to use shall be stored in such a manner as to keep the interior free from dirt and foreign matter.

B. The Contractor shall excavate test pits as required of all sewer connections and crossings which may affect the Contractors’ work prior to ordering pipe and fittings to determine sufficient information for ordering materials.

C. Pipe shall be manufactured with integral wall bell and spigot joints in standard lengths not exceeding 20 feet:

1. SDR 35/PS 46 PVC Pipe shall not be used for gravity sewer piping that exceeds a

15 feet depth of cover.

2. SDR 26/PS 115 shall be used for gravity sewer pipe installed with a depth of cover between 15 to 20 feet.

3. Ductile Iron pipe shall be used for gravity sewer pipe installed at a depth of cover above 20 feet.

4. If the installation of pipe has a cover of less than 4 feet, the pipe class for the pipe shall be determined by utilizing the manufacturer’s load table, depth of cover, pipe diameter, and pipe bedding specified throughout the project.

2.2 SANITARY SEWERAGE PIPING

A. Plastic Pipe:

1. Material: PVC.

2. Comply with ASTM D3034, SDR-35 and SDR-26.

3. Inside Nominal Diameter: As shown on Work Orders.

4. End Connections: Bell-and-spigot style, with rubber-ring-sealed gasket joint.

5. Fittings: PVC.

6. Joints:

a. Elastomeric gaskets.

b. Comply with ASTM F477.

B. Ductile-Iron Pipe:

1. Comply with AWWA C150 or AWWA C151.

2. Minimum Special Thickness Class: 52.

3. End Connections: Bell and spigot.

4. Outside Coating:

a. Type: Asphaltic.

b. Minimum Uniform Thickness: 1 mil.

c. Comply with AWWA C151.

5. Lining:

a. Protecto 401, Tnemec Permashield 431, or equal.

6. Fittings:

a. Material: Ductile iron, Class 52 or greater.

b. Comply with AWWA C153 or AWWA C110.

c. Lining: Protecto 401, Tnemec Permashield 431, or equal.

Herbert, Rowland & Grubic, Inc. 33 31 11 - 5 007297.0445

d. Outside Coating: Asphaltic exterior.

7. Joints:

a. Rubber gasket joint devices.

b. Comply with AWWA C111.

2.3 CLEANOUT FRAMES AND COVER

A. Description:

1. Material: Gray cast iron.

2. Comply with ASTM A48, Class No. 35, AASHTO HS-20 rated.

3. Cover shall be labeled “S” or “SEWER” in 2” raised letters.

2.4 FLEXIBLE COUPLINGS

A. Description:

1. Material: Resilient, chemical-resistant, elastomeric PVC with stainless steel shield.

2. Attachment: Two Series-300 stainless-steel clamps, screws, and housings.

2.5 FLEXIBLE PIPE BOOTS FOR MANHOLE PIPE ENTRANCES

A. Description:

1. Material: EPDM.

2. Comply with ASTM C923.

3. Attachment: Series-300 stainless-steel clamp and hardware.

2.6 PIPELINE DECTECTION AND MARKING

A. Underground Warning or Pipeline Detection Tape for Sanitary Sewer

1. Refer to Section 33 05 97.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Section 01 73 00 - Execution Requirements: Requirements for installation examination.

B. Verify that excavations, dimensions, and elevations are as indicated on Work Orders.

C. Carefully examine each section of pipe and each pipe fitting before laying on conformance with the inspection requirements of the appropriate referenced standard.

3.2 PREPARATION

A. Section 01 73 00 - Execution Requirements: Requirements for installation preparation.

B. Perform trenching for sewer pipe and place pipe bedding as specified in Section 31 23 16.13.

C. Unless otherwise required by the Township, provide for a minimum cover of 4 feet above

Herbert, Rowland & Grubic, Inc. 33 31 11 - 6 007297.0445 the top of pipe laid in trenches in non-traffic areas, and 5 feet in traffic areas.

D. Clean piping interior and mating surfaces of bell, spigot and gasket before laying. Maintain clean until completed work is accepted.

E. Dig bell holes sufficiently large to permit proper joint making and to ensure pipe is firmly bedded full length of its barrel.

F. Remove large stones or other hard materials that could damage pipe or impede consistent backfilling or compaction.

G. Protect and support existing sewer lines, utilities, and appurtenances.

H. Utilities:

1. Maintain profiles of utilities.

2. Notify Township, Township Representative, or Engineer if crossing conflicts occur.

3.3 INSTALLATION

A. General Requirements for Open Cut Pipe Installation:

1. Give ample notice to the Township in advance of pipe laying operations, minimum 24 hours.

2. Lay pipe proceeding upgrade true to line and grades given. Lay bell and spigot pipe with bell end or groove upgrade unless otherwise directed by the Township or Engineer.

3. Contractor’s attention is called to the fact that portions of construction may be conducted at minimum allowable grade. The Contractor shall use care in setting lasers or the other means that he plans to utilize for construction of the sewers:

a. If not constructed at the required grade, the Township Representative or the Engineer shall have the option of directing the Contractor to relay the pipe to the required grade at no additional cost to the Township.

4. Exercise care to ensure that each length abuts against the next in such manner that no shoulder or unevenness of any kind occurs along the inside bottom half of the pipeline.

5. Center spigot end in bell or socket end of previously laid pipe, shove tight and secure.

6. No wedging or blocking permitted in laying pipe unless by written order of Engineer.

7. Before joints are made, bed each section of pipe full length of barrel with recesses excavated so pipe invert forms continuous grade with invert of pipe previously laid:

a. Do not bring succeeding pipe into position until the preceding length is embedded and securely in place.

8. Walking or working on completed pipeline, except as necessary in tamping or backfilling, not permitted until trench is backfilled 1 foot deep over top of pipes.

9. Take up and relay pipe that is out of alignment or grade, or pipe having disturbed joints after laying.

10. Take up and replace with new, such in place pipe sections found to be defective.

Replace at Contractor’s expense.

Herbert, Rowland & Grubic, Inc. 33 31 11 - 7 007297.0445

11. Take necessary precautions to prevent newly laid pipe from floating as a result of water accumulation in the trench, or the collapse of the pipeline from any cause.

Restore or replace pipe as necessary at Contractor’s expense.

12. Bed pipe using materials specified in Section 31 23 16.13.

13. At the close of each day’s work, and at such other times when pipe is not being laid, protect open end of pipe with a close-fitting stopper.

14. Cut pipe using only equipment specifically designed for that purpose such as an abrasive wheel, rotary wheel cutter, a guillotine pipe saw or a milling wheel saw.

The use of chisels or hand saws will not be permitted. Grind smooth cut ends and rough edges. Bevel slightly, cut end for push-on connections.

15. Where cutting of pipe is necessary, minimum laying length shall be five feet.

B. Specific Requirements:

1. Install plastic pipe and fittings and assemble joints according to ASTM D2321.

2. Refer to Section 31 23 16.13 for backfilling requirements. Place sufficient compacted backfill on each section of pipe, as it is laid, to hold firmly in place.

3. Refer to Section 33 05 97 for utility identification and signage requirements.

4. Clean and inspect each section of pipe before joining. Assemble to provide tight, flexible joints that permit movement caused by expansion, contraction, and ground movement. Use lubricant recommended by the pipe and fitting manufacturer for making joints. If unusual joining resistance is encountered or if the pipe cannot be fully inserted into the bell, disassemble joint, inspect for damage, reclean joint components, and reassemble joint.

5. Clean interior of the pipe as work progresses. Where cleaning after laying is difficult because of small pipe size, use a suitable swab or drag in the pipe and pull forward past each joint immediately after the jointing has been completed.

6. Connections to the existing sewers shall be made under the direct observation of the Township or his authorized representative. Do not permit any water, earth, debris or other materials to enter the existing sewer system

7. As soon as connections are completed, install an adequately sized plumber’s stopper in the existing manhole and brace to prevent a “blowout.” The stopper is to prevent flow from the new line from entering the existing system and it shall not be removed until written authorization to do so is given by the Township.

Routinely remove any accumulated ground and surface water from the line upstream. The Contractor shall be totally responsible for any damages To existing facilities.

C. Service Connection Fittings:

1. Make connections to sewer using fittings of same material and joint configuration as the sewer at the planned point of branch connection.

2. Use commercially manufactured wye fittings and one-eighth bends.

3. Set wye branches at proper vertical angles as required to bring service connections to the proper depth.

4. Fitting locations shall be determined in the field by the Township Representative or Engineer.

D. Joints:

Herbert, Rowland & Grubic, Inc. 33 31 11 - 8 007297.0445

1. Make joints watertight. Immediately repair detected leaks and defects. Methods of repair subject to Township’s or Engineer’s approval.

2. Lay and maintain all pipe at the required lines and grades. Place fittings and valves at the required locations with joints centered, and all valve stems plumb.

a. Do not deviate from the required line and grade, except with the approval of the Township Representative or Engineer.

3. Deflections shall not exceed pipe manufacturer’s recommended maximum allowable deflection.

3.4 WYE BRANCHES

A. Install wye branches or pipe tees at locations consistent with pipe laying operations in accordance with the Standard Detail Drawings. Use standard fittings of the same material and joint type as the pipeline into which they are installed.

B. For tapping connections into an existing pipeline refer to Standard Detail Drawings:

1. The tapping connection shall have watertight and airtight joints

3.5 LATERALS

A. In accordance with the details shown on the Standard Detail Drawings, the Contractor shall construct building laterals as designated. In general, building laterals shall consist of 6-inch gravity sewer pipe laid on as steep a grade as conditions will permit to drain the lowest level of the building, but not less than one percent:

1. All house lateral pipes must have watertight joints. All service laterals shall be reconnected as shown on the Standard Detail Drawings.

B. Any lateral installed will have a new cleanout near the curb or right-of-way as shown on the Standard Detail Drawings.

C. In connecting house laterals to the Y-Branch in the main sewer, or to the line extending from the building, an approved fitting shall be used as shown on the Standard Detail Drawings.

D. The determination as to the type of riser, slope and depth of lateral pipe at the termination point will be made by the Township’s representative in the field. Four inch diameter laterals shall be installed at a slope of 1/4 inch per foot from the main to the cleanout or plug. The minimum depth under streets shall be 5 feet. Any deviations in lateral size or slope must be approved by the Township’s Representative prior to installation.

E. Install an approved watertight plug, braced to withstand pipeline test pressure thrust, at the termination of the lateral.

F. Install a temporary marker stake (minimum 2 inch x 4 inch) extending from the end of the lateral to 1 foot above finished grade.

G. When cleanouts are in the sidewalk, caps will be flush with adjacent sidewalk surface elevation.

Herbert, Rowland & Grubic, Inc. 33 31 11 - 9 007297.0445

3.6 CRADLES AND ENCASEMENTS:

A. Provide concrete cradles and encasements in accordance with the Standard Detail Drawings. Encasements and cradles shall not be poured when there is a danger of freezing unless precautions are taken to prevent such freezing.

3.7 FIELD QUALITY CONTROL

A. Section 01 40 00 - Quality Requirements: Requirements for inspecting and testing.

B. General Requirements: Conduct tests specified herein so that each pipeline installed in the Work is tested the Township Representative’s or Engineer's satisfaction:

1. Provide tools, materials (including water), apparatus and instruments necessary for pipeline testing.

2. Conduct tests in the presence of and to the satisfaction of the Township

Representative or Engineer.

C. Cleaning Prior to Tests: Before tests are conducted, clean piping including sewers, branches and service connections until free of dirt or silt or construction debris.

D. Vertical Alignment: No vertical displacement or misalignment will be accepted. The Contractor, to the satisfaction of the Township Representative or Engineer, shall correct all defects before the work shall proceed and before acceptance.

E. Refer to Section 33 01 30.11 Television Inspection of Sewers, 33 05 05.41 Air Testing, and Section 33 05 05.43 Mandrel Testing for proper testing for the associated item.

3.8 PROTECTION

A. Section 01 73 00 - Execution Requirements: Requirements for protecting finished Work.

B. Protect pipe and aggregate cover from damage or displacement until backfilling operation is in progress.

C. Cap open ends of piping during periods of Work stoppage.

END OF SECTION