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SECTION 33 46 00 – foundation drainage system

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.

1.02REFERENCE 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.

1.03SUBMITTALS

  1. Product Data:
  2. Product data for each type of foundation drainage material required.
  3. Record Documents:
  4. Shop drawings for interfacing with total Site drainage system.
  5. Certification signed by Contractor and foundation drainage system Installer that installed materials conform to specified requirements and system was successfully checked and tested prior to covering with filtering and drainage fill.

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.

2.02DRAINAGE PIPE AND FITTINGS

  1. Perforated Clay Pipe: ASTM C 700, "Standard Strength," unglazed.
  2. Perforated Polyvinyl Chloride Pipe: ASTM D 2729.
  3. Perforated Concrete Pipe: ASTM C 444, Type 1 and applicable requirements of ASTM C 14, Class 2.
  4. Perforated Bituminized Fiber Pipe: ASTM D 2311.

2.03COMPOSITE DRAINAGE BOARD

  1. Provide prefabricated composite drainage board as part of overall foundation drainage system.
  2. Drainage Core: Manufacturer's standard three dimensional, nonbiodegradable, plastic materials designed to effectively conduct water to foundation drainage system under maximum soil pressures.
  3. Minimum flow rate of 15 gpm per foot width at 3600 psf, when tested in accordance with ASTM D 4716.
  4. Filter Fabric: Manufacturer's standard nonwoven geotextile fabric of polypropylene or polyester fibers, or a combination of them.
  5. Products: Subject to compliance with requirements, provide one of the following:
  6. "Amerdrain 500," American Wick Drain Corp.
  7. "Enkadrain 9120," Akzo Industrial Systems Co.
  8. "Battle Drain," Exxon Chemical Company.
  9. "Hydroduct 2," W.R. Grace & Co.
  10. "Sheet Drain," Greenstreak, Inc.
  11. "Miradrain 6000," Mirafi, Inc.
  12. "Hydraway 100," Monsanto Company.

2.04SOIL MATERIALS

  1. Impervious Fill: Clayey gravel and sand mixture capable of compacting to a dense composite.
  2. Drainage Fill: Evenly graded mixture of natural or crushed gravel or crushed stone and natural sand with 100 percent passing a ½ inch sieve and 0 to 5 percent passing a No. 50 sieve.
  3. Filtering Material: Evenly graded mixture of natural or crushed gravel or crushed stone and natural sand with 100 percent passing a 1½ inch sieve and 0 to 5 percent passing a No. 50 sieve.

PART 3 - EXECUTION

3.01PREPARATION

  1. Examine adjacent surfaces to receive foundation drainage system to verify suitability. Do not begin installation until subsurface conditions are satisfactory to accept drainage system.

3.02INSTALLATION

  1. Installation shall meet or exceed all applicable federal, state and local requirements, referenced standards and conform to codes and ordinances of authorities having jurisdiction.
  2. All installation shall be in accordance with manufacturer’s published recommendations.
  3. Underfloor Drainage System: Excavate for underfloor drainage system after subgrade material has been compacted but before drainage fill course has been placed. Provide a clear horizontal distance between drain pipe and trench wall on both sides not less than 2 times diameter of drain pipe, unless otherwise shown. Grade bottom of trench excavations to required slope and compact to a firm, solid bed for drain system.
  4. Apply and compact impervious fill material to raise low areas or where unsatisfactory bearing soil may occur.
  5. Impervious Fill at Footings: After concrete footings have been cured and forms removed, place impervious fill material on subgrade adjacent to bottom of footing. Place and compact impervious fill to dimensions indicated or, if not indicated, not less than 6 inches deep and 12 inches wide.
  6. Filtering Material: Place supporting layer of filtering material over compacted subgrade where drainage pipe is to be laid to depth indicated or, if not indicated, to a compacted depth of not less than 4 inches.
  7. Laying Drain Pipe: Lay drain pipe solidly bedded in filtering material. Provide full bearing for each pipe section throughout its length to true grades and alignment, and continuous slope in direction of flow.
  8. Lay perforated pipe with perforations down and joints tightly closed in accordance with pipe manufacturer's recommendations. Provide collars and couplings as required.
  9. Provide recesses in excavation bottom to receive bells for drain pipe having bell and spigot ends. Lay pipe with bells facing up slope and with spigot end entered fully into adjacent bell. Seal joint in accordance with local practices having jurisdiction.
  10. Testing Drain Lines: Test or check lines before backfilling to assure free flow. Remove obstructions, replace damaged components, and retest system until satisfactory.
  11. After testing drain lines, place additional filtering material to a depth of 4 inches around sides and top of drains.
  12. Composite Drainage Board: Coordinate placement of drainage mat with other foundation drainage materials.
  13. Comply with manufacturer's instructions for securing matting to substrate. Use adhesives and mechanical fasteners as recommended by matting manufacturer. Lap edges of fabric and extend fabric around foundation drainage pipe in accordance with mat manufacturer's recommendations. Protect in place matting during backfill operations in accordance with matting manufacturer's instructions.
  14. Do not use drainage mat as protection board over waterproof membrane unless otherwise approved by membrane manufacturer.
  15. Drainage Fill: Place drainage fill over drain lines after satisfactory testing and covering of drain lines with filtering material. Completely cover drain lines to a width of at least 6 inches on each side and above top of pipe to within 12 inches of finish grade. Place fill material in layers not exceeding 3 inches in loose depth and compact each layer placed.
  16. Overlay drainage fill material with one layer of 15 lb., asphalt or tar saturated felt or synthetic drainage fabric, overlapping edges at least 4 inches.
  17. Fill to Grade: Apply impervious fill material over compacted drainage fill at footing drains, placing material in layers not exceeding 6 inches in loose depth and thoroughly compacting each layer. Carry impervious fill to indicated finish elevations and slope away from building perimeter.

END OF SECTION 33 46 00

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