Facility Sanitary SewersME- Building Group

SECTION 221313–FACILITY SANITARY SEWERS

PART 1 - GENERAL

1.1RELATED DOCUMENTS

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this Section.

1.2SUMMARY

  1. This Section includes sewerage systems inside the building.
  2. Related Sections: The following Sections contain requirements that relate to this Section.
  3. Division3 Section "Cast-in-Place Concrete" for cast-in-place concrete structures.
  4. Division 31 Section “Earth Moving” for excavating, trenching, and backfilling.
  5. Division 33 Section “Sanitary Utility Sewerage Piping” for sanitary systems outside the building.

1.3DEFINITIONS

  1. Sewerage Piping: System of sewer pipe, fittings, and appurtenances for gravity flow of sanitary sewage.

1.4QUALITY ASSURANCE

  1. Environmental Agency Compliance: Comply with local, state, and federal regulations pertaining to sanitary sewerage systems.
  2. Utility Compliance: Comply with regulations pertaining to sanitary sewerage system. Include standards of water and other utilities where appropriate. Comply with standards and specifications of authorities having jurisdiction.

1.5SUBMITTALS

  1. Product Data: Submit manufacturer’s product data and installation instructions for each product specified for pipe, fittings, and accessories.

1.6DELIVERY, STORAGE, AND HANDLING

  1. Do not store plastic pipe or fittings in direct sunlight. Support to prevent sagging and bending.
  2. Protect pipe, pipe fittings, and seals from dirt and damage.
  3. Handle precast concrete manholes and other structures according to manufacturer's rigging instructions.

1.7PROJECT CONDITIONS

  1. Locate existing structures and piping to be closed and abandoned.
  2. Existing Utilities: Do not interrupt existing utilities serving facilities occupied by the Owner or others except when permitted under the following conditions and then only after arranging to provide acceptable temporary utility services.
  3. Construction that will interfere with Owner’s operations will be completed during nonproduction time such as weekends or holidays.
  4. Notify Owner not less than 48 hours in advance of proposed utility interruptions.
  5. Do not proceed with utility interruptions without receiving Owner’s written permission.

1.8SEQUENCING AND SCHEDULING

  1. Coordinate sanitary sewerage system connections to existing on-site sanitary sewer.
  2. Coordinate with interior building drainage systems, where applicable. Coordinate with exterior drainage system and with specification 333100.
  3. Coordinate with other utility work.

PART 2 - PRODUCTS

2.1PIPES AND FITTINGS

  1. Polyvinyl Chloride (PVC) Sewer Pipe and Fittings: ASTMD3034, SDR35, for gasketed joints.
  2. Gaskets: ASTMF477, elastomeric seal.
  3. Reinforced-Concrete Sewer Pipe and Fittings: ASTMC76, ClassIV, WallB, for gasketed joints.
  4. Gaskets: ASTMC443, rubber.
  5. Ductile-Iron Sewer Pipe: ASTMA746, for push-on joints.
  6. Standard-Pattern, Ductile-Iron Fittings: AWWAC110, ductile or gray iron, for push-on joints.
  7. Gaskets: AWWAC111, rubber.
  8. Cast-Iron Soil Pipe and Fittings: ASTMA74, Service and Extra-Heavy classes, hub-and-spigot ends, gray, cast iron, for gasketed joints.
  9. Gaskets: ASTMC564, rubber, thickness to match class of pipe.

2.2SPECIAL PIPE COUPLINGS AND FITTINGS

  1. Gasket-Type Pipe Couplings: Rubber or elastomeric compression gasket, made to match outside diameter of smaller pipe and inside diameter or hub of adjoining larger pipe, for nonpressure joints.
  2. Gaskets for Concrete Pipe: ASTMC443, rubber.
  3. Gaskets for Plastic Pipe: ASTMF477, elastomeric seal.
  4. Gaskets for Dissimilar Pipes: Compatible with pipe materials being joined, manufactured by Fernco.

2.3MANHOLES

  1. Precast Concrete Manholes: ASTMC478 precast, reinforced concrete, of depth indicated, with provision for rubber gasket joints.
  2. Diameter: 48 inches minimum.
  3. Ballast increase thickness of precast concrete sections or add concrete to base section as required to prevent flotation.
  4. Base Section: 10-inch minimum thickness for base slab and 5 inch minimum thickness for walls and base riser section, and having a separate base slab or base section with integral floor.
  5. Riser Sections: 5-inch minimum thickness, 48-inch minimum diameter, and lengths to provide depth indicated.
  6. Top Section: Eccentric cone type, unless concentric cone or flat-slab-top type is indicated. Top of cone of size that matches grade rings.
  7. Gaskets: ASTMC443, rubber.
  8. Grade Rings: Include one to three reinforced-concrete rings, of 3 inch to 12-inch total thickness, that match a 24-inch-diameter frame and cover.
  9. Steps: Steel, ASTM A615, Grade 60, deformed reinforcing rods encased in propylene plastic, ASTM D4101, integrally cast into manhole sidewalls.
  10. Pipe Connectors: ASTMC923, resilient, of size required, for each pipe connecting to base section. Kor-N-Seal by Trellborg or approved equal.
  11. Manhole Frames and Covers: ASTMA536, Grade60-40-18, heavy-duty ductile iron. Include 24-inch inside diameter by 7- to 9-inch riser with 7-inch minimum width flange and 26 inch diameter cover. Identification wording equivalent to "SANITARY SEWER." Manufacturers:
  12. Neenah.
  13. East Jordan Iron Works.
  14. Approved substitute.

2.4CONCRETE

  1. General: Cast-in-place concrete according to ACI 318, ACI 350/350R, and the following:
  2. Cement: ASTMC150, TypeII.
  3. Fine Aggregate: ASTMC33, sand.
  4. Coarse Aggregate: ASTMC33, crushed gravel.
  5. Water: Potable.
  6. Structures: Portland-cement design mix, 4000 psi minimum, with 0.45 maximum water-cement ratio.
  7. Reinforcement Fabric: ASTMA185, steel, welded wire fabric, plain.
  8. Reinforcement Bars: ASTMA615, Grade60, deformed steel.
  9. Structure Channels and Benches: Factory or field formed from concrete. Portland-cement design mix, 4000 psi minimum, with 0.45 maximum water-cement ratio.
  10. Include channels and benches in manholes.

1.Manhole Channels: Concrete invert, formed to same width as connected piping, with height of the vertical sides to 1/2 of the pipe diameter. Form curved channels with smooth, uniform radius and slope.

1)Invert Slope Through Manhole: In accordance with plan.

2.Manhole Benches: Concrete, sloped to drain into channel.

1)Slope: 0.25 inch per foot.

2.5BACKWATER VALVES

  1. Valves are to be of the flow operated check type with a slip-on connection. Inlet port area shall be 100 percent of the mating pipe port size. The port area shall contour down to a duckbill which shall allow passage of flow in one direction while preventing reverse flow. The check valve is designed to slip on over the specified pipe outside diameter. The flexible duckbill sleeve shall be one piece rubber construction with fabric reinforcement. The check valves shall also have a protective neoprene exterior wrapping for protection against sunlight attack. Check valves shall be attached to the pipe outside diameter by means of vendor furnished clamps. Company name, plant location, valve size and serial number shall be bonded to the check valve.
  2. All valves shall be of the Series TF-2 as manufactured by Red Valve Co., Inc.

2.6CLEANOUTS

  1. Cast-Iron Cleanouts: ASMEA112.36.2M, round, cast-iron housing with clamping device and round, secured, scoriated, cast-iron cover. Include cast-iron ferrule with inside calk or spigot connection and countersunk, tapered-thread, brass closure plug. Use units with top-loading classifications according to the following applications:
  2. Light Duty: In earth or grass foot-traffic areas.
  3. Medium Duty: In paved foot-traffic areas.
  4. Heavy Duty: In vehicle-traffic service areas.
  5. Extra-Heavy Duty: In roads.
  6. Sewer Pipe Fitting and Riser to Cleanout: ASTMA74, Service class, cast-iron soil pipe and fittings.

PART 3 - EXECUTION

3.1EARTHWORK

  1. Excavating, trenching, and backfilling are specified in Division31 Section "Earth Moving."

3.2INSTALLATION, GENERAL

  1. General Locations and Arrangements: Drawing plans and details indicate general location and arrangement of underground sanitary sewer system piping. Location and arrangement of piping layout take design considerations into account. Install piping as indicated to extent practical.
  2. Install ppiping beginning at low point of systems, true to grades and alignment indicated with unbroken continuity of invert. Place bell ends of piping facing upstream. Install gaskets, seals, sleeves, and couplings according to manufacturer’s written instructions for use of lubricants, cements, and other installation requirements. Maintain swab or drag line, and pull past each joint as it is completed.
  3. Use manholes for changes in direction, unless fittings are indicated. Use fittings for branch connections, unless direct tap into existing sewer is indicated.
  4. Use proper size increasers, reducers, and couplings where different sizes or materials of pipes and fittings are connected. Reducing size of piping in direction of flow is prohibited.
  5. Install gravity flow systems piping at constant slope between points and elevations indicated. Install straight piping runs at constant slope, not less than that specified, where slope is not indicated.
  6. Extend sanitary sewer piping and connect to site’s sanitary pipes in sizes, slopes and locations indicated. Terminate piping as indicated.
  7. Coordiniate with the Architect/Engineer to verify that the temperature of the fluid being conveyed is within the manufacturer’s acceptable range for the pipe being provided.

3.3IDENTIFICATION

  1. Materials and their installation are specified in Division31 Section "Earth Moving." Arrange for installation of green detectable warning tapes directly over piping and at outside edges of underground structures.

3.4PIPE JOINT CONSTRUCTION AND INSTALLATION

  1. General: Join and install pipe and fittings according to the following.
  2. Polyvinyl Chloride (PVC) Plastic Pipe and Fittings: As follows:
  3. Join pipe and gasketed fittings with elastomeric seals according to ASTMD2321.
  4. Install according to ASTMD2321.
  5. Concrete Pipe and Fittings: Install according to ACPA "Concrete Pipe Handbook." Use the following seals:
  6. Round Pipe and Fittings: ASTMC443, rubber gaskets.
  7. Hub-and-Spigot, Cast-Iron Soil Pipe and Fittings: With rubber gaskets according to CISPI's "Cast Iron Soil Pipe and Fittings Handbook." Use gaskets that match class of pipe and fittings.
  8. Ductile-Iron Sewer Pipe with Ductile-Iron Fittings: According to AWWAC600.
  9. System Piping Joints: Make joints using system manufacturer's couplings, except where otherwise specified.
  10. Join piping made of different materials or dimensions with couplings made for this application. Use couplings that are compatible with and fit both systems' materials and dimensions.

3.5SPECIAL PIPE COUPLING AND FITTING APPLICATIONS

  1. Special Pipe Couplings: Use where indicated and where required to join piping and no other Appropriate method is specified. Do not use instead of specified methods.

1.Use the following pipe couplings for non-pressure applications:

  1. Strait pattern, sleeve type to join plain end piping of same size, or wuth small difference in outside diameters.
  2. Increaser/reducer- pattern, eccentric sleeve type to join plain end piping of different sizes. Install with inverts matching to provide unimpeded flow.
  3. Gasket type to join piping of different sizes where annular space between smaller piping’s outside diameter and larger piping’s inside diameter permits installation. Install in manner where drop in inverts matches the direction of flow.

3.6MANHOLE INSTALLATION

  1. General: Install manholes, complete with accessories, as indicated.
  2. Form continuous concrete channels and benches between inlets and outlet, where indicated.
  3. Set tops of frames and covers to elevations indicated.
  4. Place precast concrete manhole sections as indicated, and install according to ASTMC891.
  5. Provide rubber joint gasket complying with ASTMC443, at joints of sections.

3.7PIPE CONNECTIONS TO MANHOLES

  1. Connect pipe to manholes using Kor-N-Seal type flexible manhole connectors. Install per manufacturer’s instructions.

3.8PIPE CONNECTIONS AT BUILDINGS

  1. Provide a special pipe coupling at pipe termination end approximately five feet outside building. Coupling shall be capable of transitioning from similar or dissimilar dimensioned pipesusing a Fernco gasketed-type or sleeve-type flexible coupling or approved equal.
  2. Coordinate coupling type with exterior building drainage systems.

3.9CONCRETE PLACEMENT

  1. Place cast-in-place concrete according to ACI 318, ACI 350/350R, and as indicated.

3.10BACKWATER VALVE INSTALLATION

  1. Install where indicated on drawings according to manufacturer’s instructions.

3.11CLEANOUT INSTALLATION

  1. Install cleanouts and riser extension from sewer pipe to cleanout at grade. Use PVC or cast iron soil pipe fittings in sewer pipes at branches for cleanouts and for riser extensions to cleanouts. Install piping so cleanouts open in direction of flow in sewer pipe, unless otherwise indicated.

3.12TAP CONNECTIONS

  1. Make connections to existing piping and underground structures so finished work conforms as nearly as practical to requirements specified for new work.
  2. Make branch connections from side into existing piping, sizes 4 to 21 inches by removing a section of existing pipe and installing a wye fitting into existing piping. Encase entire wye with not less than 8 inches of 3000-psi, 28-day, compressive-strength concrete.
  3. Make branch connections from side into existing piping, sizes 24 inches or larger or to underground structures by cutting an opening into existing unit large enough to allow 3 inches of concrete to be packed around entering connection. Cut end of connection pipe passing through pipe or structure wall to conform to shape of and be flush with inside wall, unless otherwise indicated. On outside of pipe or structure wall, encase entering connection in 8 inches of concrete for a minimum length of 6 feet to provide additional support of collar from connection to undisturbed ground.
  4. Use concrete that will attain a minimum 28-day compressive strength of 3000 psi, unless otherwise indicated.
  5. Use epoxy bonding compound as an interface between new and existing concrete and piping materials.
  6. Protect existing piping and structures to prevent concrete or debris from entering while making tap connections. Remove debris or other extraneous material that may accumulate.

3.13CLOSING ABANDONED SEWERAGE SYSTEMS

  1. Abandoned Piping: Close open ends of abandoned underground piping that is indicated to remain in place. Include closures strong enough to withstand hydrostatic and earth pressures that may result after ends of abandoned piping have been closed. Close open ends of piping with at least 8-inch-thick brick masonry bulkheads; or close open ends of piping with threaded metal caps, plastic plugs, or other acceptable methods suitable for the sie and type of material being closed. Do not use wood plugs.
  2. Abandoned Structures: Excavate around structure as required and use either of the following procedures:
  3. Remove structure and close open ends of remaining piping. Backfill to grade according to Division 31 section “Earth Moving”.

3.14Remove top of structure down to at least 36 inches below final grade. Break up structure bottom. Fill to within 12 inches of top with stone, sand, gravel, or satisfactory soils. Fill to top with concrete. FIELD QUALITY CONTROL

  1. Clear interior of piping and structures of dirt and superfluous material as the work progresses. Maintain swab or drag in piping and pull past each joint as it is completed.
  2. In large, accessible piping, brushes and brooms may be used for cleaning.
  3. Place plug in end of incomplete piping at end of day and whenever work stops.
  4. Flush piping between manholes and other structures, as required by authorities having jurisdiction, to remove collected debris.
  5. Inspect interior of piping to determine whether line displacement or other damage has occurred. Inspect after approximately 24 inches of backfill is in place, and again at completion of the Project.
  6. Submit separate reports for each system inspection.
  7. Defects requiring correction include the following:

1.Alignment: Less than full diameter of inside of pipe is visual between structures.

2.Deflection: Flexible piping with deflection that prevents passage of a ball or cylinder of a size not less than 92.5 percent of piping diameter.

3.Crushed, broken, cracked, or otherwise damaged piping.

4.Infiltration: Water leakage into piping.

5.Exfiltration: Water leakage from or around piping.

  1. Replace defective piping using new materials and repeat inspections until defects are within allowances specified.
  2. Reinspect and repeat procedure until results are satisfactory.
  1. Test new piping systems and parts of existing systems that have been altered, extended, or repaired for leaks and defects.
  2. Do not enclose, cover, or put into service before inspection and approval.
  3. Test completed piping systems according to authorities having jurisdiction.
  4. Run video camera through the sanitary pipe after test has been complete; and submit a copy of the video to the owner when complete.
  5. Schedule tests, and their inspections by authorities having jurisdiction, with at least 24 hours' advance notice.
  6. Submit separate reports for each test.
  7. Where authorities having jurisdiction do not have published procedures, perform tests as follows:

1.Sanitary Sewerage: Perform hydrostatic test.

1)Allowable leakage is a maximum of 10 gallons per inch nominal pipe size, for every mile of pipe, during a 24-hour period

2)Close openings in system and fill with water.

3)Purge air and refill with water.

4)Disconnect water supply.

5)Test and inspect joints for leaks.

2.Sanitary Sewerage: Perform air test according to UNI-B-6.

  1. Manholes: Perform hydraulic test according to ASTMC969.
  2. Leaks and loss in test pressure constitute defects that must be repaired.
  3. Replace leaking piping using new materials and repeat testing until leakage is within allowances specified.

END OF SECTION

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Revision Date: 01/21/14 Project & Bid Package

File name: 221313 FACILITY SANITARY SEWERS