9-Attachment A.pdf

City of Lubbock, TX Attachment A

ITB 26-19345-YB

Pivot Irrigation System for Land Application

Specifications

VENDOR NAME: _____________________________________________________________

PHONE: _____________________________________________________________________

NO. ITEM MINIMUM REQUIREMENTS SELLER COMPLIANCE

YES NO

1.

Overall Length and

Scope of Work New pivots shall be tied into existing pipeline.

1.1

Purchase, Delivery, and Installation of a 1,253 foot pivot irrigation system (to replace No. L6), including new flow meter, located at the Lubbock Land

Application Site, based on specifications listed below, including dismantling existing system and moving to a location outside the circle.

1.2

Purchase, Delivery, and Installation of a 1,219 foot pivot irrigation system (to replace No. L9) , including new flow meter, located at the Lubbock Land

Application Site, based on specifications listed below, including dismantling existing system and moving to a location outside the circle.

1.3

Purchase, Delivery, and Installation of a 1,544 foot pivot irrigation system (to replace No. Lot L19) , including new flow meter, located at the Lubbock

Land Application Site, based on specifications listed below, including dismantling existing system and moving to a location outside the circle.

2. Main Pipe

8 inch – 6-5/8 inch, as required to reach desired flows at desired pressure.

-0.0115 inch wall thickness.

Piping will be formed from aisisae 1010 coil sheet.

3. Pivot Assembly

8 inch O.D. riser, Polyseal gasket for high and low pressure.

4 inch x 4 inch x 3/8 inch angle iron legs with 4 – 2 inch x 2 inch x 3/16 inch angle braces on all 4 sides.

Adjustable ring lock elbow.

Connection between pivot assembly and the first span must be flexible to allow for grade changes on the first tower.

4. Truss Design

Truss rods 11/16 inch with manufacturer’s standard heavy duty under truss braces.

5. Towers

Four legs constructed of 3 inch x 3 inch x ¼ inch angle iron bolted to 6-5/8 inch x 11 gauge tubular non-towable mobile base.

Legs must have a minimum of 5 tie braces.

Wheelbase minimum 13.0 feet maximum span length

160 feet.

6. All Towers

Connections must be of pin and hinge type design with flexible rubber boot with clamps or acceptable approved equivalent.

7. Steel Structure

Components shall be hot-dipped galvanized to

ASTM 123-73 specifications.

A minimum coat of 2.00oz/ft² average shall be applied.

8. Fasteners

All fasteners used on the system shall be grade 5 zinc coated or better.

9. Hydraulics

Operating PSI 25, Maximum 35 PSI. All systems, will be equipped with 360 degree Senninger spray nozzles, spaced on 120 inch centers, with 30 inch plugged outlets, with plastic plugs.

Rubber hose drops 3 feet above ground, standard ¾ inch x 12 inch gooseneck use pipe dope on all goosenecks with 1-3/4 pound weights.

Each drop shall be equipped with a plastic cut-off valve.

Oversized main line diameters in a combination with the specified minimum diameter shall be provided as necessary for each system to obtain the desired flow volume at the desired operating pressure.

Minimum flows at 25 PSI per system at the pivot point – all calculations shall use a 140 C factor – are as follows:

LLAS Plot L6 – 1,000 GPM

LLAS Plot L9 – 1,000 GPM

LLAS Plot L19 – 1,200 GPM

10.

Electrical and

Mechanical

10.1 All Electrical

10.1.

All electrical components must comply with the following national electrical code sections:

1. Article 250-51 Effective Grounding

2. Article 250-114 Effective Grounding

3. Article 310 Minimum Size of

Conductors

4. Article 210-5 Color Code for Branch or

Controlled

5. Article 430 Motors, Motor Circuits, or

Controlled

6. Article 675 Electrically Driven on

Controlled

Irrigation Machines.

7. National Fire Protection Standard No. 70, National Electrical Code.

10.2 Primary Power

3-phase, 480 volt, 60 hertz single phase, 120 volt, 60 hertz primary, single phase, 120 volt enclosed surge and lighting protection package shall be provided.

10.3 Programmable

Main

System allows for programming of various functions controlled by degrees of rotation.

Accuracy shall be +/- 1° with no offset to reset degrees required.

Programmable functions to include – change rate of speed.

Change direction, stop/start, and control two auxiliary ports for control of ancillary equipment.

Safety features to include: Disconnect rated at 30 amps, 600 volts.

Panel must be compatible with aims telemetry system.

11.

Electric Motor on

Gear Drives

All motors shall be ½ hp, 460-480 VAC., 3-phase with 1,725 rpm at 60 Hz, and shall be totally enclosed.

Full load torque shall be 35oz. ft. (min) and locked rotor torque 220oz. ft. (min) motors shall be rated for continuous duty cycle and have inherent overload protection.

Ball bearings shall be double sealed.

Motors shall have a plastic shroud which protects it from moisture.

Motor lead shall be run in ¾ inch conduit along mobile base and extend up tower leg approximately

3 to 4 feet.

11.2 Center Drive

Gearbox

Spur gear drive gearbox designed specifically for use on center pivot systems.

Output ratio 40-1.

The gear drive must be capable of delivering a minimum of 120,000 inch/pounds of instantaneous torques and 36,000 inch/pounds of continuous torque.

12. Tire Size

Size 11R238 Galvanized, Reinforced rims, tubeless

Provide Expected Delivery Date(s):

General Requirement and Information

Bidder shall submit with each bid, current printed literature and specification sheets on the unit offered in the response to solicitation.

Exceptions to the specifications of any items stated herein shall be fully described in writing by the bidding vendor in the space provided below. List items by item numbers.