Section_33_41_00_Storm_Drainage_Systems.docx
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SECTION 33 41 00 STORM DRAINAGE SYSTEMS
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SECTION 33 41 00
SECTION 33 41 00
STORM DRAINAGE SYSTEMS
| PART 1 | GENERAL |
| 1.1 | SECTION INCLUDES |
A. Gravity systems such as irrigation, sub-drains, and storm drains.
1.2 REFERENCES
A. ASTM C 478: Standard Specification for Precast Reinforced Concrete Manhole Section.
B. ASTM C891: Standard Practice for Installation of Underground Precast Concrete Utility Structures.
C. ASTM C 923: Standard Specification for Resilient Connectors Between Reinforced Concrete Manhole Structures, Pipes and Laterals.
1.3 PERFORMANCE REQUIREMENTS
A. Vertical Cover: 2 feet minimum or as indicated.
B. Remove any section of pipe already placed that is found to be out of alignment tolerance indicated, defective, or damaged. Relay or replace without additional cost to Government.
1.4 PROJECT CONDITIONS
A. Minimize neighborhood traffic interruptions. Barricade stockpiles.
B. Provide access to adjacent properties for local traffic and pedestrians.
C. Repair public and private facilities damaged by Contractor.
| D. | Prior to Backfilling: Commission pipeline per Section 33 08 00. Provide sizes and types of equipment connections and fittings which match pipe materials when pressure testing system. |
| 1.5 | ACCEPTANCE |
| A. | Each storm drain system component must pass applicable requirements in Section 33 08 00. |
| PART 2 | PRODUCTS | |
| 2.1 | PIPING AND FITTINGS |
A. Provide piping materials and factory fabricated piping products of sizes, types, and classes indicated.
B. Where not indicated, provide proper selection acceptable to COR to comply with installation requirements.
C. Provide pipe fittings and accessories of same material and weight or class as pipe, with joining method indicated or recommended by manufacturer.
| 2.2 | MORTAR AND CONCRETE | |
| A. | Mortar: Cement per Section 04 05 16. | |
| B. | Grout: Cement, Section 03 61 00. |
C. Concrete:
1. Cast-in-place, class 4000 per Section 03 30 04.
2. Precast, class 5000 per Section 03 40 00.
2.3 CLEANOUTS AND MANHOLES
A. Basin: Concrete floor with cast in place concrete walls or ASTM C 478 precast requirements.
B. Steps: None.
| C. | Top: Concentric cone or concentric flat slab concrete deck allowed only with COR's permission. |
| D. | Frame and Cover: Asphalt coated, heavy duty, ductile iron per Section 05 56 00 with flat top design meeting load rating H-20 and appropriate utility lettering. Shape, size and lifting device as indicated. |
| E. | Pipe connectors: |
1. Precast Bases: Resilient, complying with ASTM C 923. Sand mortar grout pipe connections.
2. Cast in Place of Connections to Existing Manhole with Plastic Pipe: Use rubber manhole adapter gasket for precast sections. Grout per Section 03 61 00 for cast in place sections.
F. Joints in Sections: Bituminous mastic coating unless indicate otherwise.
| 2.6 | INLETS AND CATCH BASINS | |
| A. | Basin: Concrete floor and walls. |
B. Frame and Grate:
1) Asphalt coated, heavy duty, cast iron per Section 05 56 00; shape and size as indicated.
2) Galvanized, heavy duty, steel per Sections 05 12 00 and 05 05 10; shape and size as indicated.
C. Pipe Connectors: Resilient per ASTM C 923. Sand mortar grout.
| 2.7 | OUTFALLS | |
| A. | Cast-in-place or precast concrete with reinforced headwall, apron, and tapered sides. Provide riprap, Section 31 37 00, if indicated. | |
| 2.8 | DRAIN PIPE JOINT SCREENS | |
| A. | Heavy mesh burlap, coal-tar saturated felt, 18 to 14 mesh copper screening or synthetic drainage fabric. | |
| B. | Plastic or corrosion resistant metal bands. | |
| PART 3 | EXECUTION | |
| 3.1 | PREPARATION | |
| A. | Verify trench excavation is ready to receive work, and dimensions, and elevations are as indicated. | |
| B. | Hand trim excavations to required elevations. Backfill over excavations per Section 31 23 26. | |
| C. | Remove stones larger than 2 inches or other hard matter that could damage pipe or impede backfilling or compaction. |
D. Examine areas and conditions under which materials and products are to be installed. Do not proceed with system installation until unsatisfactory conditions have been corrected in manner acceptable to system installer.
E. Clearly identify and promptly set aside defective or damaged pipe.
F. Use pipe-cutting tool acceptable to pipe manufacturer.
| 3.2 | INSTALLATION – PIPE FITTINGS | |
| A. | Place bell or groove end facing upstream. | |
| B. | Install gaskets in accordance with manufacturer’s recommendations. | |
| C. | Plug pipeline branches, stubs or other open ends that are not to be immediately connected. |
D. Clean interior pipe of dirt and debris as work progresses.
E. Insulate dissimilar metals from direct contact with each other using neoprene gaskets or asphalt coatings.
F. Meet line and grade tolerance specified in Section 33 08 00.
| 3.3 | INSTALLATION – CLEANOUTS AND MANHOLES | |
| A. | Form bottom of excavation clean and smooth to correct elevation. | |
| B. | Place structures in location indicated. | |
| C. | Install precast units per ASTM C 891. |
D. Establish elevations and pipe inverts for inlets and outlets indicated.
E. Where structures occur in pavements, mount frame and cover ½ inch below finished surface, elsewhere set 3 inches above finished grade unless indicated otherwise.
| 3.4 | INSTALLATION – INLETS OR CATCH BASINS | |
| A. | Form bottom of excavation clean and smooth to correct elevation. | |
| B. | Construct with all connecting piping and appurtenances in their final position. |
A. Cut all piping parallel to interior surface wall. Grout connection to provide smooth transition inlet into pipe.
| 3.5 | ABANDONED UTILITIES | |
| A. | Plug and cap with concrete open ends of abandoned underground utilities that are to remain in place. | |
| B. | Provide closures to withstand hydrostatic or earth pressure that may result after ends of abandoned utilities have been closed. | |
| 3.6 | TAP CONNECTIONS | |
| A. | Not allowed. Provide a cleanout or manhole structure. | |
| 3.7 | BACKFILLING | |
| A. | Prior to Backfilling: Commission pipeline, Section 33 08 00. Provide sizes and types of equipment connections and fittings which match pipe materials when pressure testing system. | |
| B. | Trenches: Refer to Section 33 05 20. | |
| C. | Structures: Refer to Section 31 23 23. | |
| 3.8 | CLEANING | |
| A. | Remove debris, concrete, or other extraneous material that accumulates in existing pipe or structures. | |
| B. | Clean all pipelines after testing. Do not flush sand, gravel, concrete, debris or other materials into existing pipe system. | |
| 3.9 | SURFACE RESTORATIONS |
A. Provide temporary paved surfaces where Trenches pass through roadways, Driveways, or sidewalks.
B. Restore paved surfaces, Section 33 05 25.
C. Finish landscaped surfaces as applicable.
1. With grass; Section 32 92 00 or
2. Other ground cover; Section 32 93 13.
END OF SECTION
STORM DRAINAGE SYSTEMS Page 4
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