HomeMy WebLinkAboutSPEC_328400_IRRIGATIONSYSTEM_08272021Project # 21012.00 VANCE THOMPSON VISION
BOZEMAN, MT
SITE PLAN SUBMISSION
IRRIGATION SYSTEM 32 84 00 - 1
SECTION 32 84 00 - IRRIGATION SYSTEM
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and provisions of Contract, including General Conditions and other Division 1
Specification sections, apply to work of this section.
1.2 SUMMARY
A. This Section includes the following:
1. Furnishing and installation of all exterior irrigation system components.
2. Furnishing and installing all low voltage control wiring, including connection into controller
terminal strip.
3. Furnishing and installing irrigation system controller, excluding 120 volt wiring.
B. Trenching and backfill for irrigation system components is specified in Section 32 84 10 of this
Specification.
C. Electrical Contractor shall furnish and install all 120 volt or greater wiring, including all necessary
conductors, raceways and conduits, breakers, fuses, label plates and miscellaneous items
required for a complete functioning installation. Contractor shall coordinate with utility provider for
point of connection in location as noted on the plans.
1.3 QUALITY ASSURANCE
A. Qualifications of Installer: Provide at least one person who shall be present at all times during
execution of this portion of the work and who shall be thoroughly familiar with the type of materials
being installed and material manufacturer's recommended methods of installation and who shall
direct all work performed under this section.
B. Coordination of Work: All work of this section, and the installation of all lawns and all plant
materials shall be performed by one Contractor.
C. Codes and Standards: In addition to complying with all pertinent codes and regulations, comply
with the latest rules of the National Electrical Code and National Plumbing Code for all electrical
and plumbing work and materials. Where provisions of pertinent codes and standards conflict
with the requirements of this section of these Specifications, the more stringent provisions shall
govern.
1.4 SUBMITTALS
A. Material List: Before any irrigation system materials are delivered to the job site, submit to the
Owner’s Representative a complete list of all irrigation system materials proposed to be furnished
and installed.
1. Show manufacturer's name and catalog number for each item, furnish complete catalog cuts
and technical data, and furnish the manufacturer's recommendations as to method of
installation.
2. Do not permit any irrigation system component to be brought onto the job site until it has
been approved by Owner’s Representative.
Project # 21012.00 VANCE THOMPSON VISION
BOZEMAN, MT
SITE PLAN SUBMISSION
IRRIGATION SYSTEM 32 84 00 - 2
1.5 PRODUCT HANDLING
A. Protection: Use all means necessary to protect irrigation system materials before, during, and
after installation and to protect the installed work and materials of all other trades.
B. Replacements: In the event of damage, immediately make all repairs and replacements
necessary to the approval of the Owner’s Representative and at no additional cost to the Owner.
PART 2 - MATERIALS
2.1 PIPE:
A. Plastic Pipe:
1. Pipe sizes shall conform to those shown on the plans. No substitutions of smaller pipe
shall be allowed. Substitutions of larger pipe may be approved. All pipe rejected due to
damage, defects, or non-conformance to the specifications shall be removed immediately
from the site.
2. All plastic pipe shall be rigid unplasticized PVC-160, PVC 200 conforming to ASTM D-
1784 and D-2241 standard specifications for PVC plastic pipe, or as shown in drawings.
The pipe shall be homogeneous throughout and free from visible cracks, holes, foreign
materials, blisters, deleterious, wrinkles, and dents.
3. All pipe shall be continuously and permanently marked with the following information.
Manufacturer's name or trademark, size, schedule and type of pipe, working pressure at
73 degrees F (22.8 degrees C). and National Sanitation Foundation (N.S.F.) approval.
4. All pipe 2-1/2 inches (6.4 cm) and smaller shall be slip type joints. All pipe 3 inches (7.6
cm) and larger shall be gasket type joints. All pipe fittings to be installed for pipe 2-1/2
inches (-6.4 cm) and smaller shall be molded fittings manufactured of the same material
as the pipe and shall be suitable for solvent weld or threaded connections. All pipe fittings
to be installed for pipe 3 inches (7.6 cm) and larger shall be epoxy coated steel fittings
with compression gaskets as manufactured by Pierce, PO Box 528, Eugene, OR
97440,(503-485-3111), or approved equal.
5. Slip fitting socket taper shall be so sized that a dry unsoftened pipe end, conforming to
these special provisions, can be inserted no more than halfway into the socket. Plastic
saddle and flange fittings will not be permitted. Only schedule 80 pipe or fittings may be
threaded.
6. When connection is plastic to metal, plastic male adapters shall be used. The male
adapters shall be hand tightened, plus one turn with a strap wrench. Joint compound
shall be Teflon Tape only.
B. Sleeves:
1. All sleeve material shall be rigid unplasticized PVC-Schedule 40 pipe. The pipe shall be
homogeneous throughout and free from visible cracks, holes, foreign materials, blisters,
deleterious, wrinkles, and dents.
2. All sleeves shall be 4” or larger as required to facilitate mainlines, lateral lines and wire sizes
as shown on the plans.
2.2 RISERS
Project # 21012.00 VANCE THOMPSON VISION
BOZEMAN, MT
SITE PLAN SUBMISSION
IRRIGATION SYSTEM 32 84 00 - 3
A. Spray Heads: All stationary spray heads shall have risers of high density polyethylene plastic pipe
("funny pipe") with spiral barbed ell fittings. Minimum length of "funny pipe" shall be 18 inches.
B. Rotor Pop-up Heads: All rotor heads shall have Lasco Unitized Swing Joints.
2.3 FITTINGS
A. Solvent Weld:
1. All fittings 2-1/2” and smaller shall be schedule 40 solvent weld. Fittings shall be
manufactured by Lasco, Spears or approved equal.
B. Gasketed:
1. All fittings 3” and larger shall be ductile iron. Fittings shall be manufactured by Harco,
Sceptor or approved equal.
C. Poly Pipe:
1. Use industry standard means for joining and welding.
2. Submit fittings for approval by Owner’s Representative.
2.4 MANUAL VALVES
A. Gate Valves:
1. All manual gate valves, sizes 2 inches (5 cm) and smaller, shall be all bronze double
disc wedge type with integral taper seats and with non-rising stem.
2. All gate valves of 2-1./2 inches (6.4 cm) size or larger shall be iron body, brass trimmed,
double disc wedge type with integral taper seats and with non-rising stems, 125 PSI
rated. Gate valves shall function and be equal to PGL 701-A flanged, PGL 705-A
threaded, or PGL 708-A gasketed.
2.5 VALVE BOXES
A. All valve boxes for valves 3” and larger and air release valves shall be Carson model 1419
standard with non-hinged cover or approved equal. Contractor to provide Carson model 1419E
6” extension boxes as required.
B. All valve boxes for valves smaller than 3” shall be Carson model 910-10” round or approved
equal.
C. All manual control valves, zone shut-off valves, gate valves or globe valves unless otherwise
indicated, shall be installed in valve access box of proper size as required for easy access to the
valve. Standard valve box to be Carson 1419-12B with locking green cover or approved equal.
2.6 SPRINKLER HEADS
A. Sprinkler heads shall be as indicated on the plans or approved equal
B. Sprinklers shall be attached to the irrigation system per the drawings. Sprinklers to be properly
set and adjusted for optimal operation.
C. Contractor shall deliver four (4) spare heads for each type used and four (4) sets of sprinkler head
adjustment tools for each head type used to the Owner.
2.7 AUTOMATIC REMOTE CONTROL VALVES
Project # 21012.00 VANCE THOMPSON VISION
BOZEMAN, MT
SITE PLAN SUBMISSION
IRRIGATION SYSTEM 32 84 00 - 4
A. Automatic control valves shall be per the drawings or approved equal. Size of valves as follows:
Flows up to 30 GPM to be 1” automatic control valve, flows from 31 GPM to 75 GPM to be 1-1/2”
automatic control valve, flows from 76 GPM to 100 GPM to be 2” automatic control valve or per
manufacture’s recommendations.
B. Automatic control valves to be installed as shown on the plans. Contractor shall adjust pressure
regulation as necessary to provide optimal performance of the irrigation heads.
C. Contractor shall provide two (2) spare valves for each size used to the Owner.
2.8 IRRIGATION CONTROLLER
A. Controller location to be coordinated with Owner and Owner’s Representative. All wires to be in
conduit for a professional installation.
2.9 CONTROL CABLE
A. All electrical control wire to match manufacturer’s specifications. Contractor shall supply and
install complete system per manufacturer’s recommendations including electrical grounding,
electrical splices and ancillary items required for a complete system.
B. Verification of wire types and installation procedures shall be checked to conform to local codes.
2.10 OTHER MATERIALS
A. Materials to be furnished: Supply as part of this contract the following tools:
1. Two keys for each automatic controller.
The above equipment shall be turned over to the Owner at the conclusion of the project. Before
final inspection can occur, evidence that the Owner has received materials must be shown to the
Owner’s Representative.
B. All other materials, not specifically described but required for a complete and proper irrigation
system installation, shall be new, first quality of their respective kinds, and subject to the approval
of the Owner’s Representative.
PART 3 - EXECUTION
3.1 SURFACE CONDITIONS
A. Inspection: Prior to all work of this section, carefully inspect the installed work of all other trades
and verify that all such work is complete to the point where this installation may properly
commence. Verify that irrigation system may be installed in strict accordance with all pertinent
codes and regulations, the original design, the referenced standards, and the manufacturer's
recommendations.
B. Discrepancies: In the event of discrepancy, immediately notify the Owner’s Representative. Do
not proceed with installation in areas of discrepancy until all such discrepancies have been fully
resolved.
Project # 21012.00 VANCE THOMPSON VISION
BOZEMAN, MT
SITE PLAN SUBMISSION
IRRIGATION SYSTEM 32 84 00 - 5
3.2 FIELD MEASUREMENTS
A. Make all necessary measurements in the field to ensure precise fit of items in accordance with
the original design.
3.3 TRENCHING AND BACKFILLING
A. Perform all trenching and backfilling as specified by Section 328410 of this Specification.
3.4 INSTALLATION OF PIPING
A. Layout the piping system in strict accordance with the plans. Where piping is shown on the plans
to be under paved areas but running parallel and adjacent to planted areas, the intention is to
install the piping in the planted areas.
B. Pipe Depth: All mainlines shall be installed with 18 inches minimum cover over the pipe with the
exception of the 6” mainline which is to have a minimum of 36” of cover and the 4” mainline which
is to have a minimum of 24” of cover. All laterals shall be installed with 12 inches minimum cover
over the pipe.
C. Line Clearance: All lines shall have a minimum clearance of 4 inches (10.2 cm) from each other,
and 6 inches (15.2 cm) from lines of other trades, except through pipe sleeves. Parallel lines shall
not be installed directly over one another but should be separated sufficiently to allow for repairs.
D. Inspection of Pipe and Fittings: Carefully inspect all pipe and fittings before installation, removing
all dirt, scale, and burrs and reaming as required; install all pipe with all markings up for visual
inspection and verification.
E. Plastic Pipe:
1. Plastic pipe shall be installed in a manner so as to provide for expansion and contraction
as recommended by the manufacturer.
2. All plastic joints shall be solvent-weld joints or slip seal joints. Only the solvent cement
recommended by the pipe manufacturer shall be used. All plastic pipe and fittings shall
be installed as outlined and instructed by the pipe manufacturer and it shall be the
Contractor's responsibility to make arrangements with the pipe manufacturer for any, field
assistance that may be necessary. The Contractor shall assume full responsibility for the
correct installation.
3. Slip seal gasketed joints shall be used on all pipe 3 inches (7.6 cm) and larger.
4. All plastic to metal joints shall be made with plastic male adapters.
5. The solvent-weld joints shall be made dry.
6. The solvent-weld joints shall be allowed to set at least 24 hours before pressure is
applied to the system on PVC pipe.
F. Thrust Blocks:
1. Provide concrete thrust blocks for all pipe as required by the schedule on the plans.
2. All thrust blocks shall bear directly on undisturbed earth. Center pipe in the middle of
thrust block.
3.5 INSTALLATION OF EQUIPMENT
Project # 21012.00 VANCE THOMPSON VISION
BOZEMAN, MT
SITE PLAN SUBMISSION
IRRIGATION SYSTEM 32 84 00 - 6
A. General:
1. All fittings, valves, etc. shall be carefully placed in the trenches as shown on the plans.
2. All control wires shall be clearly labeled, by station using weatherproof material, both at
the controller and at the valve. The inside cover of all automatic valve boxes shall also
have the station number clearly painted in white.
3. All sprinklers, having adjustable nozzles, shall be adjusted for proper and adequate
distribution of the water over the coverage pattern of the sprinkler.
4. All nozzles on stationary pop-up sprinklers or stationary spray heads shall be tightened
after installation. All sprinklers having an adjusting screw, adjusting stem or adjusting
friction collars shall be adjusted as required for the proper arc of coverage, radius,
diameter and/or discharge.
B. Lawn Sprinkler Heads:
1. Install lawn sprinkler heads where indicated on the plans and in strict accordance with the
manufacturer's recommendations.
3. Set heads to grade at initial install.
2. Along walks and driveways where finished grade is established, set all heads 1/4 inch
(64mm) below surface of pavement at time of installation and 1-1/2 inches (3.8 cm) from
pavement. Stake all temporary risers.
3. Set all heads to final grade where sod lawn will be installed.
4. Upon completion of maintenance period, reset all lawn sprinkler heads flush with grade
and firmly anchor with soil.
3.6 AUTOMATIC IRRIGATION CONTROLLER
A. Controllers per plans. Mount as directed by Owner’s Representative. All wires to be in conduit for
a professional installation.
3.7 TESTING AND INSPECTION
A. Closing-in Uninspected Work: Do not allow or cause any of the work in this section to be covered
up or enclosed until it has been inspected, tested, and approved by the Owner’s Representative.
Where trenches are not closed at the end of the day Contractor shall accept all liability for any
damage or injury that may result from open trenches. Provide barricades and warning tape as
necessary around all open trenches.
B. Flushing: Before backfilling the mainline, and with all control valves in place, but before lateral
pipes are connected, completely flush and test the mainline and repair for all leaks; flush out each
section of lateral pipe before sprinkler heads are attached.
C. Testing:
1. Make all necessary provisions for thoroughly bleeding the line of air and debris.
2. Before testing, fill the line with water for a period of at least 24 hours.
3. After valves have been installed, test all live water lines for leaks at a pressure of 100 psi
for a period of two hours, with all couplings exposed and with all pipe sections
centerloaded. Contractor shall provide deliver/documentation of system testing.
4. Furnish all necessary testing equipment and personnel.
5. Correct all leaks and retest until acceptance by the Owner’s Representative.
Project # 21012.00 VANCE THOMPSON VISION
BOZEMAN, MT
SITE PLAN SUBMISSION
IRRIGATION SYSTEM 32 84 00 - 7
D. Final Inspection:
1. Thoroughly clean, adjust, and balance all systems.
2. Demonstrate the entire system to the Owner’s Representative, proving that all remote
control valves are properly balanced, that all heads are properly adjusted for radius and
arc of coverage, and that the installed system is workable, clean, and efficient.
3.8 INSTRUCTIONS
A. Record Drawings:
1. Record accurately on one set of black and white prints of the site plan all installed work
including both pressure and non-pressure lines.
2. Upon completion of each increment of work, transfer all such information and dimensions
to the print. The dimensions shall be recorded in a legible and workmanlike manner.
Maintain as-built drawings on site at all times. Make all notes on drawing in pencil (no ball
point pen). When the work has been completed, transfer all information from the field
record print to a set of reproducible drawings.
3. Dimension from two permanent points of reference (buildings, monuments, sidewalks,
curbs, pavement, etc.). Locations shown on as-built drawings shall be kept day to day as
the project is being installed. All dimensions noted on drawings shall be 1/8 inch (32mm)
in size (minimum).
4. Show locations and depths of the following items:
a. Point of connection
b. Routing of sprinkler pressure lines
c. Gate valves
d. Sprinkler control valves
e. Quick coupling valves
f. Routing of control wires
g. Sprinkler heads
h. Other related equipment
B. Controller Charts:
1. As-built drawings must be approved by Owner’s Representative before charts are
prepared.
2. Provide one controller chart for each controller supplied showing the area covered by
automatic controller, of the maximum size controller door will allow.
3. The chart is to be a reduced drawing of the actual as-built system. Chart shall be a photo
positive with different colored shading used to show area of coverage for each station.
When completed and approved, the chart shall be hermetically sealed between two
pieces of plastic. The chart shall be mounted in the controller using Velcro or equal type
of semi-permanent fastening device.
4. These charts must be completed and approved prior to final acceptance of the irrigation
system by the Owner.
C. Operation and Maintenance Manuals: Prepare and deliver to the Owner’s Representative within
ten calendar days prior to completion of construction, four individually bound copies of the
operations and maintenance manual. The manual shall describe the material installed and shall
be in sufficient detail to permit operating personnel to understand, operate and maintain all
equipment. Spare parts lists and related manufacturer information shall be included for each
equipment item installed. Each complete, bound manual shall include the following information.
Project # 21012.00 VANCE THOMPSON VISION
BOZEMAN, MT
SITE PLAN SUBMISSION
IRRIGATION SYSTEM 32 84 00 - 8
1. Index sheet stating Contractor's address and telephone number, duration of guarantee
period, list of equipment with names and addresses of local manufacturer representatives.
2. Complete operating and maintenance instructions on all major equipment.
3. In addition to the above maintenance manuals, provide the maintenance personnel with
instructions for system operation and show written evidence to the Owner at the
conclusion of the project that this service has been rendered.
3.9 GUARANTEE PERIOD
A. Guarantee: The entire irrigation and water system shall be guaranteed to give satisfactory service
for a period of one year from date of acceptance by the Owner. Should any trouble develop within
the time specified above due to inferior or faulty materials or workmanship, the trouble shall be
corrected at no expense to the Owner. Any and all damages resulting from faulty materials or
workmanship shall be repaired by the Contractor to the satisfaction of the Owner, at no cost to
the Owner.
B. Guarantee Period Services:
1. The Contractor shall winterize the system and perform spring start-up of the system
during the guarantee period. These functions shall be coordinated in advance with the
Owner, and the Owner's personnel shall be encouraged to participate.
2. Upon re-energizing the system, the Contractor shall repair any leaks or breaks and shall
check each head and valve, making any adjustment necessary.
END OF SECTION 32 84 00