45-02607 Manholes.pdf

SECTION 02607

MANHOLES DIVISION 2

Bald Eagle Township Authority 02607-1 February 2024 Draketown Road Sewer Replacement Manholes Contract No. BEA-2

PART 1 - GENERAL

1.01 SECTION INCLUDES

A. Furnish all labor, material, and equipment to construct manholes at such locations as shown on the Drawings or as required by the Owner. In addition to manholes, work in this Section shall include but not be limited to:

1. Drop Manholes

2. Testing

B. Manholes shall conform to Appendix No. 1 herein, design indicated by the Drawings and to the requirements specified herein.

1.02 RELATED SECTIONS

A. Section 01340: Shop Drawings, Product Data and Samples B. Section 02205: Earthwork for Pipelines C. Section 15070: Piping System Appurtenances D. Appendix No. 1 - Standard Specifications for Extensions of and Connections to the West

Branch Regional Authority Sanitary Sewer System, April 2014

1.03 REFERENCES

A. American Society for Testing and Materials/Latest Edition

1. ASTM A48 - Specification for Gray Iron Casting

2. ASTM C62 - Specification for Sewer and Manhole Brick

3. ASTM C139 - Specification for Concrete Masonry Units for Construction

4. ASTM C443 - Specification for Joints for Circular Concrete, Sewer and Culvert

5. ASTM C478 - Specification for Precast Reinforced Concrete Manhole Sections

6. ASTM C923 - Specification for Resilient Connections Between Reinforced

Concrete Manhole Structures and Pipes

1.04 SUBMITTALS

A. Submit Shop Drawing/Product Data from manufacturer's descriptive literature and specifications for all materials used in this Section. Submit in accordance with Section 01700: Contract Closeout.

B. Other special detailed drawings as may be required for submittal.

PART 2 - PRODUCTS

Bald Eagle Township Authority 02607-2 February 2024

2.01 PRECAST REINFORCED CONCRETE MANHOLE

A. Manhole components shall be precast concrete and shall be manufactured in accordance with the provisions of ASTM Specification C-478.

B. All joints shall be tongue and groove (male and female). The inside diameter of the manhole sections shall be cast and through wall lifting holes shall not be permitted on this Project. Provide factory installed lifting keys or lugs integrally in the manhole components at least forty-eight (48”) inches.

C. Precast concrete manhole tops shall be “eccentric cone” sections. However, flat manhole tops shall be used for shallow manholes if required. Flat top manholes shall be sufficiently reinforced to withstand AASHTO-H-20 highway loading. The manhole top opening shall have a minimum diameter of thirty (30”) inches.

D. Manhole bases shall be precast concrete “flanged” type bases.

E. All precast manhole sections shall be furnished with manhole steps at twelve (12”) inch centers and properly aligned. The manhole steps shall be properly aligned vertically as the manhole sections are being assembled. Reinforced plastic manhole steps shall be ½” Grade 60, ASTM A615 deformed steel reinforcement completely encapsulated in Grade 49108, ASTM D 4104 copolymer polypropylene plastic compound.

F. Approved precast manhole section manufacturers:

1. Terre Hill Concrete Products

2. Fi-Hoff Concrete Products

3. Approved Equal

2.03 GRADE ADJUSTMENT RINGS

A. If manhole frame grade adjustment is required including on sloped areas, the grade adjustment of the frame shall be accomplished by installing a rubber composite grade adjustment riser ring under the manhole cover frame.

B. Flat and tapered riser rings shall be Infra-Riser® Multi-Purpose Rubber Composite

Adjustment Riser as manufactured by East Jordan Iron Works, 301 Spring Street, P.O.

Box 439, East Jordan, MI 49727, us.sales@ejco.com, (800) 626-4653 or approved equal.

2.04 MANHOLE STEPS

A. Steps shall be Aluminum Alloy AA Designation 6061-T6 meeting Federal Specifications QQ-A200/8 or Copolymer Polypropelene plastic molded over No. 4, Grade 60 steel mailto:us.sales@ejco.com

Bald Eagle Township Authority 02607-3 February 2024 reinforcement, Model No. PS-4-B as manufactured by M.A. Industries, Inc., Peachtree City, GA, or approved equal.

B. Place all steps on 12-inch centers.

C. Portion of steps embedded in concrete shall be given a coat of heavy bodied bituminous paint.

D. Steps and installation shall meet ASTM C478 requirements.

2.05 TRENCH BACKFILL MATERIAL

A. Material shall be the same as specified in Section 02205: Earthwork for Pipelines.

2.06 PIPE OPENING SEALS

A. At each point where the sewer pipe enters (or leaves) a manhole base a cast-in-place flexible pipe gasket system, similar or equal to “PSX Boot System” as manufactured by Press Seal Gasket Co., Fort Wayne, Indiana shall be installed. Rubber gasket materials shall conform to the requirements of ASTM Specifications C-443 and C-923.

2.07 PREFORMED PLASTIC SEALING COMPOUND

A. Sealing compound shall be of either bituminous or butyl rubber base and conform to Federal Specification SS-S-210 A, Type I.

B. Material shall be in rope form, supplied with a two-piece cover to preclude adhesion until use.

C. Approved manufacturers:

1. K.T. Snyder Company, Inc. - RUB R-NEK

2. Concrete Products Supply Company - CPS-210

3. Approved equal

2.08 PRECAST JOINT SEALENT

A. The joints and/or joining surfaces of the manhole sections, riser rings, frames or precise structures shall be sealed with a butyl-rubber based tape. The material shall be EZ-WRAP Plastic as supplied by Press-Seal Gasket Corporation or approved equal. The butyl rubber shall contain 2% or less volatile matter and shall be 0.05 inches thick. The backing component shall be high-density polyethylene film. A release paper may be utilized. The tape width shall be six (6”) inches wide. The tape shall be overlapped at least twice its width. The tape shall not be stretched during application.

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2.09 COATING

A. After the manhole sections are completely cured, exterior surfaces, including the concrete grade adjustment rings and manhole component joints, shall be entirely coated an emersion grade cross linked epoxy coating system equal to International Protective Coatings, Interseal, 670 HS or approved equal.

B. Coating system shall be applied in two (2) coats of six (6) mils each. The final dry film thickness of the coating shall not be less than twelve (12) mils.

C. Coating system specified is represented by Tri State Paint & Coatings, Inc., Mr. Robert H.

Makrush, President; email: b.jmak@aol.com, telephone number (814) 504-0303 and fax number is (814) 774-3023.

D. Concrete shall be cured at least twenty-eight (28) days prior to coating.

E. Concrete surfaces shall be clean, dry and free from curing compounds, release agents, troweling compounds, surface hardeners, efflorescence, grease, oil, dirt, old coatings and loose or disintegrating concrete.

F. If the manhole sections are coated by the manhole manufacturer, final payment will not made to the Successful Bidder until the Successful Bidder has furnished to the Engineer a written certification, acceptable to the Engineer, from the manhole manufacturer certifying that the coating applied to the manhole sections conforms with the coating specification set forth herein.

2.10 MANHOLE FRAMES AND COVERS

A. Manhole frames and covers shall have twenty-seven (27”) inch diameter openings and shall be the “self-sealing” type, Neenah Foundry Company Model No. R-1753-A or East Jordan Iron Works, Inc. Catalog No. 1890Z1 Frame and Catalog No. 1890A1GS cover or approved equal.

B. If a “water-tight” frame and cover is required or so indicated on the Drawings or directed to be installed by the Engineer, the frame and cover shall be Neenah Foundry Company Model No. R-1755-F2 or East Jordan Iron Works, Inc. Catalog No. 1893Z Frame, Catalog No.

1893G Seal Plate and Locking Bar, and Catalog No. 1890A1 Cover, or approved equal.

C. The manhole covers shall be marked “BALD EAGLE SEWER”. The Successful Bidder shall drill four (4) holes in the manhole frame and the top of the precast concrete manhole eccentric cone section. After cleaning the manhole frame and the top of the precast concrete manhole eccentric cone section, the Successful Bidder shall place joint sealing compound on the concrete and shall securely bolt the manhole frame to the eccentric cone section or the manhole flat top with ¾” expanding head concrete anchors.

mailto:b.jmak@aol.com

Bald Eagle Township Authority 02607-5 February 2024

D. If precast concrete grade adjustment rings are required to properly bring the manhole cover to finished grade, joint sealing compound shall be placed between adjacent rings, between the ring and frame and between the ring and eccentric cone section or flat manhole top. In all cases the frame must be bolted directly to the eccentric cone section or the flat manhole top.

E. If manhole frame grade adjustment is required and on sloped areas, the “unequal” grade adjustment of the frame shall be accomplished by installing a rubber composite grade adjustment riser ring under the manhole cover frame. Flat and tapered riser rings shall be Infra-Riser® Multi-Purpose Rubber Composite Adjustment Riser as manufactured by East Jordan Iron Works, 301 Spring Street, P.O. Box 439, East Jordan, MI 49727, us.sales@ejco.com, (800) 626-4653 or approved equal.

2.11 CONCRETE

PROPERTY VALUE

Design Compressive Strength at Not less than 28 calendar days 4,500 psi

Maximum Aggregate size 3/4 inch

Maximum water/cement ratio 4.25 gallons per 94-pound sack of cement

Slump at point of concrete discharge Not to exceed 3 inches

Total air content by volume at point Not less than 4 percent nor of concrete discharge more than 8 percent

2.12 CONCRETE MATERIALS

A. Portland Cement

1. Portland cement must conform to ASTM C 150, Type II or III.

2. Blended hydraulic cement must conform to ASTM C 595, Type I.

3. Use one brand and type of cement for formed concrete having exposed-to-

B. Air-Entraining Admixture

1. Admixture must be free of sodium chloride and nitrates and conform to ASTM C 260.

mailto:us.sales@ejco.com

Bald Eagle Township Authority 02607-6 February 2024

C. Water

1. Water must be potable.

2.13 REINFORCEMENT MATERIALS

A. Reinforcement Bars

1. Bars must be deformed and conform to ASTM A 615, Grade 60.

2. Galvanized bars for structural sections exposed to the weather in accordance with

ASTM A 153/A 153M.

B. Cold-Drawn Steel Wire

1. Wire must conform to ASTM A 82/A 82M.

C. Welded-Wire Fabric

1. Provide uncoated wire fabric conforming to ASTM A 185/A 185M. Provide galvanized wire fabric in structural sections exposed to the weather.

D. Supports for Concrete Reinforcement

1. Include bolsters, chairs, spacers, and other devices necessary for proper spacing, supporting, and fastening reinforcement bars and wire in place. Provide wire supports conforming to ACI/MCP 405, ANSI A48.1, ANSI A48.2, ASTM E 648, ACI SP-66 and CRSI 10MSP.

2. Legs of support in contact with formwork for sections that will be exposed to weather must be hot-dip galvanized after fabrication, plastic coated, or corrosion-resistant steel bar supports.

2.14 AGGREGATE

A. Aggregate for base bedding shall meet the Specifications of PennDOT Publication 408, Section 703, for AASHTO No. 57, coarse aggregate.

PART 3 - EXECUTION

3.01 EXCAVATION AND BACKFILL

A. Excavation shall conform to the applicable requirements of Section 02205: Earthwork for Pipelines.

Bald Eagle Township Authority 02607-7 February 2024

B. Excavate manhole area to allow minimum of 6 inches of bedding of AASHTO No. 57 aggregate properly leveled and compacted.

3.02 BASES

A. Precast

1. Precast bases shall be set on aggregate bed as Subsection 3.1 B.

2. Flow channels shall be placed after pipe placement. Forming shall be as

Subsection 3.2 A.4.a.b using Class A concrete.

3. Flow channels, same size as pipe, may be constructed directly with the precast base at time of manufacture. Submit manufacturer's product data to Engineer for approval before placing order.

3.03 MANHOLE SECTIONS

A. All precast concrete ring sections and top sections shall fit together readily to permit effective jointing. Joints between adjacent sections of all manholes shall be made with 2 strips of approved preformed joint sealing compound. All material squeezed out on inside shall be cut off.

B. Adjoining riser and conical top sections shall be fitted together in such a manner as to assure true vertical alignment of manhole steps.

3.04 MANHOLE FRAMES AND COVERS

A. Set manhole frame to proper elevation and to cross section slope where required.

B. install infra riser between the top section and frame.

C. Tighten down manhole frame using bolts long enough to reach insert in cone or flattop section.

D. Contractor shall be responsible to see that all such items as mentioned under this Section are adjusted to the new paving elevation to provide a smooth, even transition from pavement to manhole cover. Refer to Section 02600: Paving, Surfacing, Walkways and Cubs, 3.02 Grade Adjustment of Utility Structures.

3.05 DROP MANHOLES

A. Drop connection shall be made where the invert of any inlet pipe is 2 feet or more higher than the invert out of the manhole.

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B. Precast manhole sections shall have openings with integrally cast pipe seals to fit design elevations for new installations.

C. Entire configuration of piping shall be installed outside of the manhole.

3.06 LIFTING RECESS SEALING

A. Seal with tapered rubber plug designed to fit recess.

B. Drive plug home to ensure water and air tightness.

C. Straight through lifting holes of exposed concrete (no hole forming material in place) shall be tightly filled with waterproof mortar and when dry, painted with an approved bituminous coating.

3.07 PLANNED PIPE OPENINGS

A. When future pipe connections have been planned for manholes, they shall be plugged to preclude exfiltration and infiltration.

1. With integral pipe seals place a pipe stopper/plug of the size required, properly secured for any thrust caused by testing, etc.

2. Where a "doghouse" opening may occur, lay up cement masonry units with waterproof mortar, parge, and when dry paint with an approved bituminous coating.

3.08 TESTING

A. Each manhole shall be tested using the vacuum testing method. Testing of manholes constructed on existing sewer lines where flow must be maintained will not be required.

Backfilling of the manhole prior to testing is permitted if the manhole is tested within 24 hours of backfilling.

B. All testing shall be performed in the presence of the Engineer and to his or her complete satisfaction.

C. Manholes shall be complete in place and frames secured for testing acceptance.

D. Contractor shall furnish all equipment and tools required for satisfactory vacuum testing to include:

1. Vacuum apparatus equipped with necessary piping, control valves, and gauges to control air removal rate from manhole and to monitor vacuum.

Bald Eagle Township Authority 02607-9 February 2024

2. Provide an extra vacuum gauge of known accuracy to frequently check test equipment.

3. Manhole frame seal plate with vacuum piping connections.

4. Pipe plugs.

E. Vacuum Test Procedure

1. Clean manholes and plug pipes with properly sized plugs.

2. Perform vacuum testing in accordance with testing equipment manufacturer's written instructions.

3. Draw a vacuum of 10 inches of mercury and close the valves.

4. Manhole shall be acceptable when vacuum does not drop below 9 inches of mercury for the following manhole sizes and times:

a. 4-foot diameter - 60 seconds

b. 5-foot diameter - 75 seconds

c. 6-foot diameter - 90 seconds

F. Manhole test failures shall require the determination of the leakage source and correction of same. If the Contractor chooses to backfill prior to testing, re-excavation to detect leaks shall be at the Contractor's expense.

1. Repair, replace defective material and workmanship using materials and methods approved by the Owner.

2. Repairs, replacements, and retesting required for acceptance shall be performed with no additional cost to the Owner.

3. Contractor shall be liable for additional inspection costs when retesting is required.

3.09 BACKFILLING

A. Prior to backfilling ensure that all concrete cradles, encasements are dry, all spalls, scars, etc. are repaired, and all bituminous coatings have been applied.

B. Backfilling and compaction shall meet the requirements of Section 02205: Earthwork for

Pipelines.

3.10 CLANKING MANHOLE COVER

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All manhole covers and frames shall fit properly to prevent “clanking”. “Clanking” manhole covers shall be machined to produce a proper fit or “clanking” manhole covers shall be removed from the Project.

3.11 EPOXY CEMENT GROUT

epoxy-resin grout formulated of an epoxy component and selected silica aggregate in a pre-proportioned package. The grout properties shall be as follows:

A. Compressive strength, ASTM D 695: Minimum 12,000 psi in 28 days at 73 degrees F, ambient and material temperature B. Flexural strength, ASTM D 790: Minimum 3,800 psi in 28 days at 73 degrees F, ambient and material temperature C. Tensile, shear strength, ASTM D 638: Minimum 1,500 psi in 28 days at 73 degrees F, ambient and material temperature D. Acceptable manufacturers:

1) Sika Corporation: Sikadur Grout-Pak

2) The Euclid Chemical Company: Poly-Patch

3) Or Equal

Surfaces to receive the grout shall be prepared in accordance with the manufacturer’s instructions.

The epoxy cement grout shall be mixed in accordance with the manufacturer's instructions for preconditioning and two-component mixing. Place the grout in accordance with the manufacturer's instructions.

3.12 WATERTIGHT MANHOLE FRAME AND COVER

If a “water-tight” frame and cover is required or so indicated on the Drawings or directed to be installed by the Owner, the frame and cover shall be Neenah Foundry Company Model No. R- 1755-F2 or East Jordan Iron Works, Inc. Catalog No. 1893Z Frame, Catalog No. 1893G Seal Plate and Locking Bar, and Catalog No. 1890A1 Cover, or approved equal.