MD ANDERSON Project No. XX-XXXX / MD ANDERSON PROJECT NAME
A/E Name / Issue Description
A/E Project No. / Month, 00, 0000

SECTION 33 05 00 – adjusting manholed and inlets

PART 1 - GENERAL

1.01RELATED DOCUMENTS

  1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
  2. Specifications throughout all Divisions of the Project Manual are directly applicable to this Section, and this Section is directly applicable to them.

1.02SUMMARY

  1. Provide all work for adjusting, abandoning, and capping existing sewer manholes, inlets, and clean-outs where required by the Drawings. Adjust manholes and inlets to positions and elevations shown or otherwise required by Project conditions.
  2. Subject to the approval of the Owner's Representative, prefabricated steel extension rings may be furnished for adjustment of manholes.

1.03REFERENCE STANDARDS

  1. The latest published edition of a reference shall be applicable to this Project unless identified by a specific edition date.
  2. All reference amendments adopted prior to the effective date of this Contract shall be applicable to this Project.
  3. All materials, installation and workmanship shall comply with all applicable requirements and standards.

1.04SUBMITTALS

  1. Submit a schedule indicating proposed sequence of operations to Owner's Representative for review prior to start of work. Include coordination for shutoff, capping, and continuation of utility services as required, together with details for dust and noise control protection.
  2. Provide detailed Sequence of Work to ensure uninterrupted progress of Owner's on Site operations.
  3. Submit photographs of existing conditions of structure surfaces, equipment, and adjacent improvements that might be misconstrued as damage related to removal operations. File with Owner's Representative prior to start of work.

1.05JOB CONDITIONS

  1. Owner will occupy buildings immediately adjacent to areas of Work. Conduct Work in manner that will minimize need for disruption of Owner's normal operations. Provide minimum of 72 hours advance notice to Owner of activities that will affect Owner's normal operations.
  2. Do not close, block, or otherwise obstruct streets, walks, or other occupied or used facilities without written permission from authorities having jurisdiction. Provide alternate routes around closed or obstructed traffic ways if required by governing regulations.
  3. Maintain existing utilities indicated to remain in service and protect them against damage during operations.
  4. Do not interrupt utilities serving occupied or used facilities, except when authorized in writing by authorities having jurisdiction. Provide temporary services during interruptions to existing utilities, as acceptable to governing authorities.

PART 2 - PRODUCTS

2.01GENERAL

  1. All materials shall meet or exceed all applicable referenced standards, federal, state and local requirements, and conform to codes and ordinances of authorities having jurisdiction.

2.02MATERIALS, GENERAL

  1. Manholes, inlet rings, plates, grates, covers, and brick in good condition, removed from the manholes and inlets in the process of abandonment, capping, or adjustment, may be reused.
  2. When prefabricated steel rings are furnished the material shall conform to ASTM A36, or equal.

2.03MANHOLES

  1. Precast Concrete Manholes: ASTM C 478, precast reinforced concrete, of depth indicated with provision for rubber gasket joints.
  2. Riser Sections: 4 inch minimum thickness, 48 inch diameter, and lengths to provide depth indicated.
  3. Top Section: Eccentric cone type, unless concentric cone or flat slab top type is indicated. Top of cone to match grade rings.
  4. Grade Rings: Provide 2 or 3 reinforced concrete rings, of 6 to 9 inches total thickness and match 24 inch diameter frame and cover.
  5. Gaskets: ASTM C 443, rubber.
  6. Steps: Cast into base, riser, and top sections sidewall at 12 to 16 inch intervals.
  7. Pipe Connectors: ASTM C 923, resilient, of size required, for each pipe connecting to base section.
  8. Brick Manholes: Brick and mortar, of depth indicated.
  9. Brick: ASTM C 32, Grade MS, manhole brick.
  10. Mortar and Parging: ASTM C 270, Type S, using ASTM C 150, Type II Portland cement.
  11. Cast in Place Manholes: Reinforced concrete of dimensions and with appurtenances indicated.
  12. Manhole Steps: Wide enough for an adult to place both feet on one step and designed to prevent lateral slippage off the step.
  13. Material: Ductile iron or cast aluminum.
  14. Material: Steel reinforced plastic.
  15. Manhole Frames and Covers: ASTM A 536, Grade 60 40 18, heavy duty, ductile iron, 24 inch inside diameter by 7 to 9 inch riser with 4 inch minimum width flange, and 26 inch diameter cover, indented top design, with identification lettering cast into cover.

2.04CATCH BASINS AND INLETS

  1. Catch Basin Frames and Grates: ASTM A 536 Grade 60 40 18, heavy duty, ductile iron, 24 inch inside diameter by 7 to 9 inch riser with 4 inch minimum width flange, and 26 inch diameter flat grate having small square or short slotted drainage openings.
  2. Curb Inlets: Precast concrete, brick, or other materials, of dimensions conforming to utility standards.

2.05CONCRETE AND REINFORCEMENT

  1. Concrete: Portland cement mix, 3,000 psi.
  2. Cement: ASTM C 150, Type II.
  3. Fine Aggregate: ASTM C 33, sand.
  4. Coarse Aggregate: ASTM C 33, crushed gravel.
  5. Water: Potable.
  6. Reinforcement: Steel conforming to the following:
  7. Fabric: ASTM A 185, welded wire fabric, plain.
  8. Reinforcement Bars: ASTM A 615, Grade 60, deformed.

PART 3 - EXECUTION

3.01CONSTRUCTION

  1. Carefully remove manholes, inlet rings, covers, plates, and grates and clean the contact areas of all mortar and grease.
  2. Provide new rings, covers, plates, and grates to replace items broken in the process of removal and cleaning with items of same material and design.
  3. Prefabricated steel extension rings shall be either of the one-piece or two-piece type, as necessary, for the amount of adjustment.
  4. When the adjustment involves lowering the top of the manhole or inlet, a sufficient depth of concrete or brick courses shall be removed to permit reconstruction on a batter not exceeding 1 inch horizontal to 2 inches vertical.
  5. For brickwork, the mortar shall be cleaned from the top course of brick remaining in place and from all brick to be re-used and the manhole or inlet rebuilt to the original top dimensions.
  6. When the adjustment involves raising the elevation of the top of manhole or inlet, the top course of brick shall be cleaned or mortar and built up vertically to the new elevation using new brick, brick salvaged from other manhole or inlet adjustments, or concrete.
  7. After adjustment, reinstall the manhole, inlet ring, cover, plate, or grate with the top conforming to the proposed new surface of street or grading.
  8. Where abandonment of an inlet or manhole is required, it shall be removed to an elevation a minimum of one foot below subgrade elevation, or as otherwise indicated on the Drawings and capped or back-filled from the flow line to subgrade with special sewer back-fill.

END OF SECTION 33 05 00

The University of Texas / adjusting manholes and inlets
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