328400 Planting Irrigation.pdf

08-01-16

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SECTION 32 84 00

PLANTING IRRIGATION

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Automatically-controlled lawn trees shrub irrigation system, controllers and all other appurtenances.

1.2 RELATED REQUIREMENTS

A. Concrete Work, Reinforcing, Placement and Finishing: Section 03 30 00, CAST-IN-PLACE CONCRETE.

B. Excavation, Trench Widths, Pipe Bedding, Backfill, Shoring, Sheeting, Bracing: Section 31 20 00, EARTH MOVING.

1.3 ABBREVIATIONS

A. HDPE: High-density polyethylene plastic.

B. NPT: National pipe thread.

C. PTFE: Polytetrafluoroethylene.

D. PVC: Polyvinyl chloride plastic.

1.4 DEFINITIONS

A. Circuit Piping: Downstream from control valves to sprinklers, specialties, and drain valves.

B. Drain Piping: Downstream from circuit-piping drain valves.

C. Main Piping: Downstream from point of connection to water distribution piping to, and including, control valves.

D. Low Voltage: As defined in NFPA 70 for circuits and equipment operating at less than 50 Volts or for remote-control, signaling power-limited circuits.

1.5 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American Society of Mechanical Engineers (ASME):

1. B16.18-2012 - Cast Copper Alloy Solder Joint Pressure Fittings.

2. B16.22-2013 - Wrought Copper and Copper Alloy Solder Joint Pressure

Fittings.

3. B16.24-2011 - Cast Copper Alloy Pipe Flanges and Flanged Fittings:

Classes 150, 300, 600, 900, 1500 and 2500.

C. American Society Of Sanitary Engineering (ASSE):

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1. 1013-2011 - Reduced Pressure Principle Backflow Preventers and

Reduced Pressure Principle Fire Protection Backflow Preventers.

D. ASTM International (ASTM):

1. B88-14/B88M-13 - Seamless Copper Water Tube.

2. B813-10 - Liquid and Paste Fluxes for Soldering of Copper and Copper

Alloy Tube.

3. D1785-15 – Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedule 40, 80, and 120.

4. D2239-12- Polyethylene (PE) Plastic Pipe (SIDR) Based on controlled

Inside Diameter.

5. D2241-15 – Poly (Vinyl Chloride) (PVC) Pressure Rated Pipe (SDR

Series).

6. D2466-15 – Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40.

7. D2564-12 - Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic

Piping Systems.

8. D2609-15 - Plastic Insert Fittings for Polyethylene (PE) Plastic

Pipe.

9. D2683-14 - Socket-Type Polyethylene Fittings for Outside

Diameter-Controlled Polyethylene Pipe and Tubing.

10. D2855-15 - Two-Step (Primer and Solvent Cement) Method of Joining

Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride)

(CPVC) Pipe and Piping Components with Tapered Sockets.

E. American Welding Society (AWS):

1. A5.8/A5.8M-04 - Filler Metals for Brazing and Braze Welding.

F. National Fire Protection Association (NFPA):

1. 70 2011 Edition - National Electrical Code.

1.6 PREINSTALLATION MEETINGS

A. Conduct preinstallation meeting at project site before beginning Work of this section.

1. Required Participants:

a. Contracting Officer's Representative.

Contractor.

b. Installer.

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2. Meeting Agenda: Distribute agenda to participants minimum 3 days before meeting.

a. Installation schedule.

b. Installation sequence.

c. Preparatory work.

d. Protection before, during, and after installation.

e. Installation.

f. Terminations.

g. Transitions and connections to other work.

h. Inspecting and testing.

i. Other items affecting successful completion.

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

1.7 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show size, configuration, and installation details.

2. Show complete detailed irrigation layout covering design of system showing pipe sizes and lengths; fittings; locations; types and sizes of sprinklers; controls; backflow preventers; valves; drainage pits;

location and mounting details of electrical control equipment complete wiring diagram showing routes and wire sizes for; power, signal and control wiring details and connections to water supply main.

3. Do not start work before final shop drawing approval.

C. Manufacturer's Literature and Data:

1. Description of each product.

a. Include rated capacities, operating characteristics, electrical characteristics, and furnished specialties and accessories.

b. Include zone chart and controller timing schedule showing each irrigation zone and its control valve; and show time settings for each automatic controller zone.

2. Installation instructions.

3. Warranty.

D. Extra Materials: Show labels describing contents.

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1. Rotary and Spray Head Sprinklers Bubblers Emitters: 5 Insert number percent of amount installed for each type and size indicated, but no fewer than 2 units.

1.8 QUALITY ASSURANCE

A. Installer Qualifications:

1. Regularly installs specified products.

2. Installed specified products with satisfactory service on five similar installations for minimum five years.

a. Project Experience List: Provide contact names and addresses for completed projects.

1.9 DELIVERY, STORAGE, AND HANDLING

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, production run number, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

D. Store plastic piping protected from direct sunlight. Support pipe to prevent sagging and bending.

1.10 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

1.11 MATERIALS

A. Piping Materials:

1. Copper Tubes: ASTM B88, Type L Type M.

a. Fittings: ASME B16.18 and ASME B16.22 solder-joint fittings.

b. Bronze Flange: ASME B16.24, class 150, ASTM B32 solder-joint end.

c. Union: Cast-copper alloy with ball-and-socket, solder joints or threaded ends.

d. Brazing Filler Metal: AWS A5.8.

e. Solder: ASTM B32, tin-antimony. Flux soldering, ASTM B813.

2. Polyethylene (PE) Plastic Pipe with Controlled ID: ASTM D2239, SIDR

11.5 or SIDR 15.

a. Fittings: ASTM D2609.

b. Flange Gaskets, Bolts, and Nuts: Type as recommended by manufacturer.

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3. Polyethylene (PE) Plastic Pipe: AWWC906 with dimension ratio of 7.3, 9, or 9.3 to provide 160 psi to 200 psi minimum pressure rating.

a. Fittings: ASTM D3261 ASTM D2683.

4. Polyvinyl Chloride (PVC) Pipe: ASTM D1785 PVC 1120, Schedule 40 80;

or ASTM D2241, PVC 1120 compound, SDR 21 or SDR 26.

a. Fittings:

1) Socket Type: ASTM D2466, Schedule 40 ASTM D, 2464 Schedule

80.

2) Threaded Type: ASTM D2464, Schedule 80.

3) Swing Joints: Threaded fittings with elastomeric seals and minimum 200 psi working pressure.

b. Solvent Cement: ASTM D2564.

c. Flange Gaskets, Bolts, and Nuts: Type as recommended by manufacturer.

B. Valves:

1. Underground Shut-Off Valves:

a. Butterfly Valves 2 Inches and Larger: AWWC504, iron body, bronze mounted, double disc with parallel or inclined seats, non-rising stem turning clockwise to close, 150 psi minimum working pressure.

b. Ball Valves, Isolation valves, 1-1/2 Inch and Smaller: Full-port ball valves with bronze body, PTFE seats, and 90 degree on/off handle. Ball valves to have NPT female end connections.

c. Operations:

1) Underground Applications: Use valves with 2-inch nut for

T-Handle socket wrench operation.

2) Aboveground and Valve Pit Applications: Use valves with handwheels.

3) Valve ends: Accommodate type of main pipe adjacent to valve.

2. Swing Check Valves:

a. Valves Smaller than 4 inches: ASTM B61 or ASTM B62, 125 psi bronze body and bonnet.

3. Quick Couplers: Brass parts, two-piece unit consisting of coupler water seal valve assembly and removable upper body to allow spring and key track to be serviced without shut down of main.

a. Lids: Lockable vinyl cover with springs for positive closure on key removal.

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4. Reduced Pressure Principle Backflow Preventer: ASSE 1013. Provide for new connection to water distribution system.

C. Sleeve Material: ASTM D2241, Schedule 40.

1.12 SPRINKLER HEADS

A. Sprinkler Heads: Manufacturer's standard unit designed to provide uniform coverage over entire area of spray as indicated on Drawings.

Internal assembly includes filter screen, capable of removal from top without removing sprinkler case from riser.

1.13 LOW VOLTAGE CONTROL VALVE WIRE

A. Wire: NFPA 70, solid copper wire, minimum 14 gage, UL LLC approved for direct burial in ground.

1.14 LOW VOLTAGE CONTROLLER CABLE

A. Multi-strand cable, UL-approved for direct burial in ground, size and wire type according to manufacturer’s recommendations.

1.15 TRACER WIRES

A. Tracer Wires: Plastic-coated copper tracer wire, 14 gage, green, Type

TW, installed with non-metallic irrigation main lines.

1.16 SPLICING MATERIALS

A. Epoxy waterproof sealing packet.

1.17 ACCESSORIES

A. Valve Box: Precast concrete with compressive strength in excess of

4,000 psi. Provide valve boxes suitable and adjustable for valve used.

1. Cast word “Irrigation” on cover.

2. Provide "T" handle socket wrenches, 5/8-inch round stock with sufficient length to extend 2 feet above top of deepest valve box cover.

3. Stencil controller and circuit numbers with permanent white epoxy paint. Letters minimum 3 inches height.

4. Provide Insert Number 30 inches long valve adjustment keys.

5. Valve Box in Plant Bed Areas: HDPE structural foam Type A, Class

III.

a. Color: Green Tan.

b. Size: Minimum 19 inches long by 14 inches deep with key-lockable hinged cast iron cover.

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6. Drip Zone Lateral Flush Cap Assembly: HDPE round reinforced plastic valve box and lid with lift hole, minimum 5-3/4 inches diameter top opening and 9-1/16 inches minimum height.

7. Emitter Access Boxes: UV resistant thermoplastic round plastic boxes with lid, tan in color. Top diameter 5 inches and 10-1/4 inches high, minimum.

B. Backflow Preventer: ASSE 1013.Provide reduced pressure principle backflow preventer at each new connection to water distribution system.

C. Pressure Gages: ASME B40.100, 4-1/2 inches diameter, all metal case, with bottom connection.

1. Dial: Dead black or white lacquered throughout with maximum graduations of 2 psi. Provide shut-off cocks.

D. Concrete Pit: Reinforced poured in place concrete structure as specified in Section 03 30 00, CAST-IN-PLACE CONCRETE or approved precast concrete unit.

1. Frames and Covers for Concrete Pit:

a. For roadway applications, traffic rated frame and cover, AASHTO

H20-44 loading.

b. For non-roadway applications, provide:

1) Cast-iron cover with cast-in identification symbol

"IRR-WATER".

2) Frame: Type I, Straight Traffic Frame, Style A, Size 30A.

3) Cover: Type Type B, Size 30A.

PART 2 - EXECUTION

2.1 PREPARATION

A. Examine and verify substrate suitability for product installation.

B. Protect existing construction and completed work from damage.

C. Examine proposed irrigation areas for compliance with requirements and conditions affecting installation and performance.

D. Set stakes to identify locations of proposed irrigation system. Obtain

Contracting Officer’s Representative's approval before excavation.

2.2 INSTALLATION - GENERAL

A. Install products according to manufacturer's instructions and approved submittal drawings.

1. When manufacturer's instructions deviate from specifications, submit proposed resolution for Contracting Officer's Representative consideration.

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B. Perform excavation, trenching, and backfilling for sprinkler system as specified in Section 31 20 00, EARTHWORK.

2.3 PIPE INSTALLATION - GENERAL

A. Layout work as indicated on drawings. Lines are to be in common trench wherever possible.

B. Install sprinkler lines to avoid HVAC trenches, electric ducts, storm and sanitary sewer lines, and existing water and gas mains; all of which have right of way.

C. Do not lay pipe on unstable material, in wet trenches or, in opinion of

Contracting Officer’s Representative, when trench or weather conditions are unsuitable for work.

D. Allow minimum of 3 inches between parallel pipes in same trench.

E. Clean interior portion of pipe and fittings of foreign matter before installation. Securely close open ends of pipe and fittings with caps or plugs to protect fixtures and equipment against dirt, water and chemical or mechanical injury. At completion of all work thoroughly clean fixtures, exposed materials and equipment.

F. Install full length of each section of pipe resting upon pipe bed with recesses excavated to accommodate bells or joints. Do not lay pipe on wood blocking.

G. Hold pipe securely in place while joint is being made.

H. Do not work over, or walk on, pipe in trenches until covered by layers of earth, well tamped, in place to depth of 12 inches over pipe.

I. Install irrigation lines and control wire at boundaries of graves, through designated utility lanes or beside roadways without disruption of irrigation system.

J. Install irrigation lines and control wire at designated utility lanes or beside roadways where possible.

K. Connect new system to existing mains. Disconnect and abandon existing irrigation system.

L. Install concrete thrust blocks where irrigation main changes direction at “L” and “T” locations and where irrigation main terminates. Delay pressure tests until minimum 36 hours after completing thrust blocks.

Size and place concrete thrust blocks for supply mains according to pipe manufacturer's instructions.

M. Minimum cover over water mains, 30 inches. Cover laterals to minimum depth of 24 inches.

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N. Place warning tape 12 inches above sprinkler system water mains and laterals.

2.4 PLASTIC PIPE INSTALLATION

A. Install plastic pipe snaked in trench at least 1 foot per 100 feet to allow for thermal construction and expansion and to reduce strain on connections.

B. Joints:

1. Solvent Welded Socket Type: ASTM D2855.

2. Threaded Type: Apply liquid Polytetrafluoroethylene (PTFE) thread lubricant or PTFE thread tape. After joint is made hand tight

(hard), strap wrench should be used to make up to two additional full turns.

2.5 VALVE INSTALLATION

A. Group remote control valves wherever possible and aligned at set dimension back of curb along roads.

B. Do not install valves under roads, pavement or walks.

C. Clean interior of valves of foreign matter before installation.

D. House pressure control valves installed adjacent to remote control valve in same valve box.

E. Install valve box with cover flush with finished grade.

F. Install control valves minimum 3 inches below finished grade.

2.6 SLEEVE INSTALLATION

A. Install sleeves where pipe and control wires are installed under walks, paving, walls, and other similar areas.

B. Install sleeves twice line size or greater extend 12 inches beyond edges of paving or construction.

C. Bed sleeves with minimum 4 inches sand backfill above top of pipe in areas where pipe is placed before hardscape is installed.

2.7 SPRINKLER AND QUICK COUPLER INSTALLATION

A. Install sprinkler heads and quick couplers on temporary nipples extending at least 3 inches above finished grade. After turf is established, remove temporary nipples, install sprinkler heads and quick couplers at ground surface.

B. Locate part circle heads to maintain maximum distance of 6 inches from edges and other boundaries.

C. Provide swing joint assembly in all sprinklers, shrub sprays and quick couplers.

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D. Set shrub spray heads 8 inches above grade and 12 inches from edge of curb or pavement. Place adjacent to walls. Stake heads before backfilling trenches. Support stakes parallel to riser.

E. Install entire system for manual and automatic draining. Equip low point of each underground line with drain valve draining into an excavation containing gravel. Backfill with excavated material and cover with 2 inches precast concrete cover.

2.8 PROTECTION

A. Protect irrigation system from traffic and construction operations.

B. Remove protective materials immediately before acceptance.

C. Repair damage.

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3. Document and distribute meeting minutes to participants to record decisions affecting installation.

4. Reduced Pressure Principle Backflow Preventer: ASSE 1013. Provide for new connection to water distribution system.

C. Sleeve Material: ASTM D2241, Schedule 40.

B. Perform excavation, trenching, and backfilling for sprinkler system as specified in Section 31 20 00, EARTHWORK.