WWCHS Greenhouse RFP 7_25_25.pdf

Request for Proposal

Greenhouse Construction for Agricultural Program Issued by: Wilkes County Schools

Date: July 25, 2025

Section 1: PROJECT OVERVIEW

Wilkes County Schools is seeking proposals from qualified greenhouse contractors to design, supply, and install a fully functional educational greenhouse to support the district’s agricultural education program.

The structure will be located on school property and must be delivered as a turnkey solution, complete with all specified systems operational upon completion.

Section 2: SCOPE OF WORK

Structure Specifications

This proposal is for turn-key services of furnishing and installing a greenhouse structure at Washington- Wilkes Comprehensive High School located at 1182 Tignall Road Washington, GA.

Greenhouse specifications should be as follows or very similar to:

● Size: 2,160 sq. ft. (30 ft. wide x 72 ft. long), with 8 ft. sidewalls

● Frame: Galvanized steel frame consisting of:

○ Column Post: 2"x4"x14 ga. rectangle with welded base plates to be anchored to concrete.

○ Bows: 2"x3"x14 ga., spaced 6 ft.

○ Trusses: 2"x2"x14 ga., 29' 3-¼” wide spans

○ Purlins: 12 runs 1-3/8” round

○ Uprights: 1-3/8" round

○ Ridge: Extruded aluminum ridge cap

○ Roof Glazing System: Extruded Aluminum roof channels spaced 6ft apart

○ Roof Glazing: 8mm clear twin wall no drip polycarbonate panels

○ Eave Glazing System: Aluminum extruded eave channels

○ Eave Glazing: 8mm clear twin wall no drip polycarbonate

○ Sealed Engineering Drawings for Structural Design

○ Sealed Engineering Drawings for Foundation Design

● Wind & Snow Loads

○ Wind Load (WL) 115 mph, 3 second gust

○ Snow Load (SL) 10 lbs. Psf, Ground Snow

○ Risk Category: II

End Gables Front gable framed for (2) 42" exhaust fans and (1) main entry door

● 2” x 2” x 14 ga. Square with brackets for wedge anchor attachment

● Horizontal Purlins: 2” x 2” x 14 ga. Square

● Base Extrusion: Aluminum base extrusion

Rear gable framed for (1) 5 ft. x 20 ft. Evaporative Cooling System and (1) Personal Door

● 2” x 2” x 14 ga. Square with brackets for wedge anchor attachment

● Horizontal Purlins: 2” x 2” x 14 ga. Square

● Base Extrusion: Aluminum base extrusion

● End Gable Glazing 8mm clear twinwall no drip polycarbonate panels, complete framing, glazing and extrusion package

Ventilation System Minimum requirements:

2-42” Slant wall exhaust fan 1hp: 15490 cfm ea. @ .10 SP 110V or 220V (All fans should be single speed and equipped with shutter and guard to offer a minimum of 1.3 air exchanges per minute @ .10 inches of static pressure).

1-30” Motorized shutter, located above cooling pad to offer a fresh air intake at the minimum stage cooling.

1-5x20ft Stainless Steel Evaporative Cooling Systems with trough, plate, and 6” thick pad. The 6” pad material should offer maximum cooling, use a 65/15-degree water/air flow with a 420 per maximum face velocity. System should be self-contained and should not require a reservoir tank.

System should include sump pump and float valve for proper level regulation.

1-5x20ft Automatic Wall Vent located behind the evaporative cooling system. Wall vent should operate using a motorized rack & pinion drive system offering years of maintenance free operation. Should include 24 volt motor, mounts, and vent boss. Should include extruded aluminum frame and warranted 8mm polycarbonate covering.

Heating Minimum requirements:

● (1) 250,000 BTU LP gas heater

● (3) Horizontal Air Flow Fans (HAF) 18”-3 bladed fans complete with guard and a split capacitor

115 volt 60 hz motor, 1.1 amps develops 1790 CFM Doors

● (1) 42"x6’-8”-3/4 Glass, A.D.A. compliant single swing door with lever action lock and key.

● (1) 72"x6’-8”-3/4 Glass, A.D.A. compliant single swing door with lever action lock and key.

Automatic Temperature Control

● (1) Touchscreen-operated environmental control system

○ Pre-wired relay box, touchscreen interface

○ Wi-Fi-enabled with app control

○ Supports up to 2 zones, programmable by time and DIF

Hanging Basket Rails

● (1) to include: 8 runs of 1-3/8” x 17 ga. tubing running length of benches

○ (6) with drippers for baskets, (2) for irrigation support

Shade Cloth

● (1) 34' x 71' Shade Cloth (51% shading)

○ Grommeted and taped 2 ft. on centers

○ Includes clamps, hardware, and lace rope for attachment

Safety Equipment Exit Signs should be located above doors and will illuminate the word “EXIT” at all times, also with emergency lights powered by a rechargeable battery. Emergency lights should come on when the power is interrupted for any reason. One multi-purpose dry chemical A-B-C rated 10 lb. fire extinguisher charged with formulated siliconized dry chemical UL rated for fighting paper, wood, fabric, grease, flammable liquid, and electrical fires.

Benches

(16) 6’ x 9’ portable benches

(1) 3 ft. Continuous bench by 60 ft. long Benches should be framed with aluminum extrusions and rectangular galvanized steel tubing.

Bench mesh should be ¾” x 13 gauge galvanized expanded metal. Bench cross braces should be made of 1” x 2” rectangular tubing and spaced 2 ft apart, benches consisting of 1” x 2” rectangular tubing.

Irrigation

● Mist: Complete system with brass high-pressure regulator, filter, punch tool, gate valves, zone controller, and solenoids. Mist irrigation should be plumbed above benches with 36” long misters spaced 4’ on centers and will have manual shut off. Hanging basket drippers are to be fixed flow and have the capacity to be turned off. Drippers should be spaced 24” on centers and 24” long.

Fertilizer Injector: Fertilizer Injector: installed minimum of 30” ground for easy access, all irrigation outlets should be serviced through fertilizer injector. Unit should provide a maximum of 30 GPM of fertilizer/water solution output. Unit should be installed with bypass and gate valves for flexibility.

● Controller: Irrigation controllers 4M with 7 zones (expandable to 13), 3 independent programs

● Galvanized Steel Solenoid Manifold

Installation Requirements

● Contractor should provide all labor and materials to erect greenhouse using professional greenhouse builders.

● Upon completion of work, contractor will test all equipment for proper operations.

● Contractor should instruct school personnel in all aspects of operation and maintenance manuals on covering and equipment.

Electrical Work

● Contractor will furnish all labor and materials to install four – 115-volt receptacles, two on each end of the greenhouse.

● Contractor will furnish all labor and materials to properly wire all greenhouse equipment into 100-amp breaker box. A Single Phase 100 Amp Breaker Box should be included.

● Contractor will furnish all labor and materials to provide necessary utility vapor tight lamps with guard installed 12’ apart down length of greenhouse. 100 wat bulb should be included.

Plumbing

● Contractor will furnish all labor and materials to provide: 7 spigots: 3 plumbed to injectors, 4 plumbed to clear water supply utilizing Schedule 40 PVC Pipe or equivalent. Note: 1 spigot should be plumbed to Evaporative Cooling System

● Contractor will furnish all labor and material to plumb evaporative cooling system.

Purchaser Responsibilities

● Contractor will have access to construction site from 7AM to 7PM

● Contractor will have access to restroom facilities

● Site preparation, foundation, and flooring will be the responsibility of Wilkes County Schools

● Electrical:

○ WCS will furnish 120/240-volt single phase electrical supply within the perimeter of greenhouse located near front door

○ WCS will provide 20’ of additional electrical cable to effectively connect power without splice

● Plumbing:

○ WCS will furnish minimum 1” PVC water supply within the perimeter of the greenhouse located near front door with a minimum of 55 PSI of pressure.

● Drainage:

○ Local system will perform final connection of drainage system

○ Including structure with sinks and/or solid concrete slabs with center drain

● Gas Line:

○ WCS will furnish gas line for heaters inside of greenhouse and will be responsible for final hook up to heater.

● Permits:

○ WCS will pull any required permits for the project

● Dumpster:

○ WCS will provide dumpster for waste material prior to installation

Section 3: INSTRUCTIONS FOR PROPOSAL SUBMISSION

● Requested proposal information in the RFP should be sent to Lou Heard, heardl@wilkes.k12.ga.us by 4pm EST on August 18, 2025.

● Proposers will be required to submit a 3-D rendering and/or a detailed sketch that clearly shows the interior and exterior layout of the greenhouse. Renderings and/or the detailed sketches should include placement of doorways, plumbing, electrical, and other internal structures along with specific dimensions of the layout. Wilkes County Schools will not consider any proposals that cannot meet the criteria above.

● Proposals should be sent to Lou Heard, lheard@wilkes.k12.ga.us by 4pm EST on August 28, 2025.

● Proposers should become familiar with any local conditions which may, in any manner, affect the services required. The proposer(s) is/are required to carefully examine the RFP terms and to become thoroughly familiar with any and all conditions and requirements that may in any manner affect the work to be performed under the contract. No additional allowance will be made due to lack of knowledge of these conditions.

● Proposals not conforming to the instructions provided will be subject to disqualification at the sole discretion of the School District.

● Any proposal may be withdrawn prior to the date and time the proposals are due. Any proposal not withdrawn will constitute an irrevocable offer for a period of 90 days, to provide the School Board with the services specified in the proposal.

Section 4: TIME SCHEDULE

● Wilkes County Schools will not be under any requirement to complete the evaluation by a specific date and reserves the right to suspend or postpone the evaluation process should the need arise due to budget constraints, time constraints, or other factors as directed by Wilkes County Schools. Notification of any changes to the time schedule will be made to Proposers by U.S.

Certified mail, email, or fax. Wilkes County Schools will review the proposals in tentative preparation for the September 2025 Board Meeting. Bid announcements, tally sheets, and/or any selection decisions will not be released prior to formal Board approval. Wilkes County Schools reserve the right to delay this timeline as necessary.

Section 5: AWARD

Wilkes County Schools reserves the right to accept or reject any or all proposals.

Wilkes County Schools reserves the right to waive any irregularities and technicalities and may, at its sole discretion, request a re-submittal or other information to evaluate any or all proposals.

Wilkes County Schools reserves the right to require proposer(s) to submit evidence of qualifications or any other information the Wilkes County School District may deem necessary.

Wilkes County Schools reserves the right, prior to approval, to withdraw the RFP or portions thereof, without penalty.

Wilkes County Schools reserves the right to: (1) accept the proposal of any firm to be in the best interest of the District and (2) to reject any and/or all proposals.

Wilkes County Schools reserves the right to conduct interviews with any of the proposers and to require a formal presentation by any of the proposers.

Wilkes County Schools reserves the right to make the final selection based upon its own ranking.

Further, nothing herein will prevent the Wilkes County School District, from making multiple awards and to deem all proposals responsive, and to assign work to any firm deemed responsive.

Wilkes County Schools reserves the right to modify or waive the conditions and requirements of this RFP where it determines that such modification is in its best interest.

Section 6: RFP INQUIRIES

In order to maintain a fair and impartial competitive process, Wilkes County Schools staff will not communicate with prospective firms regarding this RFP after RFP’s are distributed. All questions and inquiries must be submitted via email no later than 4:00 p.m. EST, August 18, 2025, to: Lou Heard, heardl@wilkes.k12.ga.us. All questions will be answered via email no later than 4:00 p.m. EST August 21, 2025. Questions and answers will be posted to the Wilkes County Schools website, under the Open Bids webpage.

If necessary, an addendum will be emailed or delivered to all who are known by Lou Heard to have received a complete set of proposal documents.

Copies of addendums will be made available for inspection at Wilkes County Schools where proposal documents will be kept on file.

Section 7: SCOPE OF QUALIFICATIONS & COMPANY INFORMATION

Brief history of your company that includes:

Similar Projects and References Design and specification process Delivery and Pre and Post Installation Process Point of contact for sales, delivery and installation:

Describe the warranty

List and describe a minimum of three (3) K-12 educational projects that your company was awarded that compare in scope to the District’s project as indicated in section 2.0. Include reference contact information for each project.

Provide a summary of your design and specification process, including the methods to specify, space planning, and layout services.

Describe the project flow from award to installation. Include the step-by-step process that your firm uses to manage projects of this nature. Provide a summary of your standard delivery and installation process. Provide post-installation procedures.

Describe who will be the company’s point of contact during sales, delivery, and installation.

Describe your company’s product warranty for all structures and components.

Section 8: INSURANCE REQUIREMENTS

It is mandatory that the person/firm submitting the proposal have minimum Liability limits of $1,000,000.00 for both Comprehensive General Liability and Motor Vehicle Liability and at least the statutory limit of Worker’s Compensation. All coverage must be included on the certificate(s).

If the Proposer’s current certificate of insurance does not meet the amount required, a statement must be included with the proposal document from their insurance carrier indicating that if a Proposal award was made to the firm, that the carrier would write the necessary insurance coverage.

The successful Proposer must then have the required insurance placed in force with written notification provided to Wilkes County Schools, prior to issuance of a purchase order which authorizes the work performance to begin. Failure to do so may invalidate the award and result in an award to the next lowest responsible proposer. Successful vendor must list Wilkes County Schools as an additional insured.

Section 9: PREPARATION AND SUBMISSION OF PROPOSAL

In order to maintain comparability and enhance the review process, it is requested that the proposals be organized and tabbed in the manner specified in section 7.