Stephen F. Austin State University RFP #GREENHOUSE PROJECT-18 ADDENDUM NO. 3

PROCUREMENT AND PROPERTY SERVICES

P. O. Box 13030

NACOGDOCHES, TX 75962

REQUEST FOR PROPOSAL

RFP NUMBER GREENHOUSE PROJECT-18

ADDENDUM NO. 3 Dated: 1/19/2018

PROPOSAL MUST BE RECEIVED BEFORE:

5:00PM, WEDNESDAY, JANUARY 31, 2018

HAND DELIVER AND/OR

MAIL PROPOSAL TO: EXPRESS MAIL TO:

Stephen F. Austin State University Stephen F. Austin State University

Procurement Services Procurement Services

P. O. Box 13030 2124 Wilson Drive

Nacogdoches, TX 75962-3030 Nacogdoches, TX 75962

Show RFP Number, Due Date and Time on Return Envelope

NOTE: PROPOSAL must be time stamped at Stephen F. Austin State University

Procurement Services before the hour and date specified for receipt of proposal.

REFER INQUIRIES TO:

Kim Jones

Stephen F. Austin State University

Procurement Services

936-468-6551

email: joneskk2@sfasu.edu

Stephen F. Austin State University RFP #GREENHOUSE PROJECT-18 ADDENDUM NO. 3

STEPHEN F. AUSTIN STATE UNIVERSITY Request for Proposal #GREENHOUSE PROJECT-18

ADDENDUM NO. 3

THIS ADDENDUM MUST BE ACKNOWLEDGED IN ORDER FOR THE RESPONSE TO RECEIVE CONSIDERATION. FAILURE TO ACKNOWLEDGE THE ADDENDUM WILL

RESULT IN DISQUALIFICATION OF THE RESPONSE.

PROPOSAL MUST BE RECEIVED BEFORE:

5:00PM, WEDNESDAY, JANUARY 31, 2018

SEE ATTACHED: EXHIBIT E: CHANGES TO SPECIFICATIONS IN PROJECT MANUAL

Stephen F. Austin State University RFP #GREENHOUSE PROJECT-18 ADDENDUM NO. 3

EXHIBIT E REVISED SPECIFICATIONS IN THE

PROJECT MANUAL

RFP #GREENHOUSE PROJECT-18 ADDENDUM NO. 3

1. MODIFICAITONS TO SPEC SECTION 13123

• 2.7.D. Clarification of cooling equipment and controller

2. Written approval for equivalent manufacturers

• Conley • Ludy • Stubby, Inc.

Attached: Section 13123 Jessica DeWitt Physical Plant Project Coordinator

GLS 501126 13123-1 GREENHOUSE SYSTEMS

SECTION 13123

GREENHOUSE SYSTEMS

PART 1 – GENERAL 1.1 DOCUMENTS

A. Drawings __________________

B. Drawings __________________

C. Drawings __________________ 1.2 DESCRIPTION

A. The greenhouse shall be 2 bay gutter connected actively heated and cooled structure

with attached cold frame. B. The greenhouse shall be furnished and installed according to specifications and

drawings.

C. Greenhouse bay dimensions are 24 feet wide by 96 feet long – Manufacturers may state

standard kit size as an alternate to be approved.

D. Cold frame bay dimensions shall be 24 feet wide by 96 feet long to match greenhouse.

(Note: Cold frame to be gutter connected to greenhouse and designed to be used as a

future greenhouse.) No polycarbonate cladding, structural frame only. No equipment to

be included except ridge vent (as noted below) for structural design and manufacturing

purposes.

E. No equipment or materials should be ordered or fabricated prior to approval of

equipment submittals and shop drawings.

1.3 PLANS AND SUBMITTALS

A. Design Criteria

1. Greenhouse frame shall be designed to meet 2012 IBC. 2. Provide structural drawings and calculations sealed by a registered professional

engineer in the state of Texas 3. Provide complete shop erection and installation drawings including the placement of

equipment, covering, and doors. 4. All equipment shall be submitted for approval prior to ordering.

B. Design Loads

1. Design the greenhouse structure to carry the following loads according to

2012 IBC Standards:

a. Dead load: structure and equipment

b. Snow load: 10 Ibs / sq. ft.

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GLS 501126 13123-2 GREENHOUSE SYSTEMS

c. Wind load: 100 mph (3 second gust)

d. Wind Exposure Category C

e. Building Risk Category 2

2. Load Combinations

a. D.L. + S.L.

b. D.L + W.L.

c. D.L. + ½ S.L + W.L or D.L + ½ W.L. + S.L.

1.4 GENERAL INFORMATION

A. A qualified greenhouse contractor approved in writing by the manufacturer shall erect

the greenhouse.

B. The greenhouse contractor shall have at least five (5) years of experience in building

greenhouses of the type specified.

C. The General Contractor shall have all site conditions correct and ready prior to

greenhouse erection.

D. No masonry, foundation, or footer installation shall be done prior to approval of

greenhouse plans.

E. Installation / erection cost are to be included in the greenhouse manufacturer’s quote.

PART 2 – MATERIALS AND EQUIPMENT 2.1 STRUCTURE

A. Approved manufacturers are:

1. International Greenhouse Company 2. Atlas Greenhouse 3. Nexus Corporation 4. Gothic Arch Greenhouses 5. Other manufacturers with written SFA approval prior to RFQ.

B. The greenhouse will be gutter connected with column and truss spacing as designated

by applicable code.

C. Sidewall height shall be 8 feet minimum with 8’ inside clearance.

2.2 MATERIALS

A. Primary Structural Steel Members

1. All steel members shall comply with ASTM A500 dimensional tolerances.

2. All steel shall be hot dipped galvanized per ASTM A123.3 mil thick minimum.

3. All damaged finishes shall be touched up with Brush-on Zinc galvanize coating.

4. Structural framing shall be fabricated from steel with minimum yield strength of

50,000 psi.

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5. End walls will be framed with steel tubing with minimum yield strength of 50,000

psi.

6. Gutters are to be extruded aluminum or galvanized.

7. No wood members are required or allowed to complete structure.

8. No rolled form pipe or round columns allowed.

B. Primary Aluminum Alloy Members

1. Extrusions 2. Primary framing: Alloy 6061 – T6 or 6063 – HS 3. Secondary framing: Alloy 6063-T6 or 6063 – HS 4. Sheet: Alloy 3003 – H14 5. Plates: Alloy 6061 – T6 or 6063 – HS

2.3 DOORS AND DOOR FRAMES

A. End wall doors to be 8’W X 7’H galvanized steel frame, double slide (from the center) door with 8mm polycarbonate covering track, and all hardware to be located on the north wall.

B. Lock sets are to be included in hardware package per SFA University requirements

2.4 BUILDING COMPONENTS

A. Greenhouse components shall be manufactured from extruded aluminum alloy or galvanized structural steel. Where design requirements can be met through the use of manufacturer’s standard kit components, such components shall be used. Provide detailed information concerning any proposed variance from this specification in the quote.

B. Connections: Hot dipped or mechanically galvanized structural bolts fastened to pre-punched or drilled connection material. All field connections shall be fastened with galvanized fasteners.

C. Anchor bolts shall be provided for fastening column posts to foundation. Provide stainless steel expansion bolts, or stainless steel epoxy anchors.

D. Trusses: Trusses may be factory welded as a complete assembly or may be field bolted. Trusses to be connected to columns by a cap plate or other structurally engineered connection. Truss members and connections shall be designed to meet or exceed the design criteria.

E. Knee bracing in the plane of the roof truss and column is allowed to meet design criteria provided 6’-8” head clearance is provided.

F. Roof purlins: provide roof purlins welded to top chord of trusses or fastened with galvanized bolts. Sidewalls and endwall girts shall be provided and fastened using galvanized fasteners.

G. Gutters are to be extruded aluminum or galvanized steel with proper sealing material to

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GLS 501126 13123-4 GREENHOUSE SYSTEMS

prevent leaking and to include a down spout on the end of each gutter run. H. Flashing: provide aluminum or galvanized flashing and associated hardware.

I. Greenhouse glazing: 8mm clear twin wall polycarbonate.

J. No roll form or sheet metal parts are to be used. No wood members are to be used to construct the greenhouse structure.

K. Bolts: Primary connections shall be made with the following bolt assembly: 1-A325 Bolt, one F436 hard washer, and one hex nut A563 GRADE DH.

2.5 VENTILATION EQUIPMENT

A. Horizontal Air Flow Fans (galvanized) – Acme HAF20A fans (9,600 cfm) or approved equal. Quote quantity to be installed. Provide one year warranty minimum.

B. Exhaust Fans – Three (3) per greenhouse Cool Air AL36K or approved equal with at least 27,000 CFM at .10 SP. Provide one year warranty minimum.

1. Fans must include automatic shutters, inlet/outlet guards, slant wall housing and belt tighteners.

2. Exhaust fans and horizontal air flow fans are to be manufactured by Acme Engineering, Inc. or approved equal.

3. Exhaust fans are to have aluminum fan blades. 4. Steel propeller fans are not acceptable.

C. Vents: a single continuous motorized ridge vent in each greenhouse and cold frame to be controlled with Wadsworth VC2000 motor or equal (no motor in cold frame).

D. Shutters: Motorized aluminum shutter to be located in the gable end of each greenhouse bay for first stage of cooling.

2.6 HEATING EQUIPMENT

A. Each greenhouse bay is to be equipped with natural gas Modine power vented heaters

or approved equal sized at min. 240,000 BTU each. One heater per greenhouse (2

total).

B. Heaters are to have stainless steel burners and exchangers.

C. Heaters with aluminum heat exchangers are not accepted.

D. Include appropriate heater hangers to mount the heaters and vent piping.

E. Provide one year warranty minimum.

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GLS 501126 13123-5 GREENHOUSE SYSTEMS

2.7 COOLING EQUIPMENT

A. Evaporative pad systems will consist of pads made of cross-fluted cellulose paper;

aluminum or stainless steel distribution and return system complete with pump and

return tank to be located on south wall.

B. To be a single system all-inclusive 4’ tall X 40’ wide x 6” wire pads with frame,pumps,

plumbing kit and reservoir

C. No wood support stringers are allowed.

D. Motorized automatic rack & pinion vent wall (to be covered in same polycarbonate

material as wall covering) for evaporative cooling system to be controlled with

Wadsworth VC1000 or approved equivalent.

2.8 ERECTION

A. Erector shall be a crew with a minimum of five (5) years’ experience installing

manufacturer’s product. Provide three (3) references with contact information

B. Greenhouse shall be erected in strict accordance with manufacturer’s drawings and

instructions.

C. Equipment shall be installed per manufacturer’s installation instructions and recognized

industry practices to insure intended function.

D. The greenhouse contractor will install equipment in place.

E. Start – up and commissioning services are to be included to insure a complete and fully

functional system including a complete commissioning report.

F. All connections to site utilities (electrical and plumbing) will be by others.

G. The cost of the greenhouse erection shall be included in the quote.

2.9 ENVIRONMENTAL CONTROLS

A. Automatic control system with a minimum of two (2) stages of heating, set point, and four (4) stages of cooling with temperature and humidity sensors to control HAF fans, exhaust fans, evaporative cooling system, and ridge vents. Controller to be equipped with decondensate sensor. Controller is to be complete with contactor panel, wiring diagram, software for remote access, and weather station.

B. Addressable equipment condition monitoring devices are required on equipment that are compatible with SFA’s interfacing system.

2.10 COVERING MATERIAL

A. Roof, sides, and ends to be covered with double walled polycarbonate. GE Lexan Thermoclear 8MM or approved equal.

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GLS 501126 13123-6 GREENHOUSE SYSTEMS

B. Polycarbonate panels are to be a virgin resin. Regrind is not acceptable. C. Polycarbonate panels must carry a minimum warranty of 10 years against yellowing and hail damage.

D. Cold frame shall have polycarbonate panels on the roof only (sides and ends are open).

2.11 SHADE CLOTH

A. A shade cloth is not required.

2.12 GROUND COVER

A. Premium grade 3.2 oz. black woven polypropylene ground fabric or approved equal.

2.13 LIGHTING A. Provide 8’ LED vapor proof lights (four (4) per bay in greenhouse only) for workspace lighting. (48,000 min. total lumens.) Lights not required in cold frame. Cooper / Metalux 8VTZ-LD4-12-DR-UNV-L840-CD1-WL-VTZ-Chain/Set-U, or Equivalent PART 3 – EXECUTION 3.1 WARRANTIES

A. Greenhouse and greenhouse equipment shall be free from all defects in materials and workmanship for one year after commissioning but not more than 18 months from receipt by customer.

3.2 INSTRUCTION

A. Approved representative of the greenhouse manufacturer to visit the job site a minimum of one time during construction to meet with building erectors and once after construction to meet with the owner.

B. Up to eight (8) hours of onsite training to be included.

END OF SECTION

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