Solicitation Addendum 3 USDA-ARS Houma Greenhouse Construction.pdf

7/10/2025

USDA ARS – Houma Sugarcane Research Greenhouse

Solicitation Addendum #3

July 10, 2025

Solicitation Addendum 3

Title: USDA ARS – Houma Sugarcane Research Greenhouse

The attention of the contractors submitting proposals for the above subject project is called to the following Amendment to the specifications and drawings. The items set forth herein, whether of omission, addition, substitution, or clarifications, are all to be included in and form a part of the proposal submitted.

The number of this Addendum 3 must be entered in the appropriate space on the SF-1442.

SPECIFICATION ITEMS

Item 1. Section 13 34 13 GREENHOUSE STRUCTURE AND SYSTEMS is

AMENDED to include new Item 2.2.30 added starting on Page 23. The complete section is reissued per the attachment.

Item 2. Section 13 34 14 GREENHOUSE CONTROL SYSTEMS is AMENDED to include updated version of Appendix A – Points and Load List. The complete

List is reissued per the attachment.

DRAWING ITEMS

Item 3. Sheet C-101. Existing utility Site Plan UPDATED to clarify extent of underground sanitary sewer line. The attached sheet replaces the previously issued sheet in its entirety.

Item 4. Sheet C-301. Civil Profiles SS-1 and W-1 UPDATED to correct sanitary flow inverts between the Greenhouse and the existing manhole. The attached sheet replaces the previously issued sheet in its entirety.

Item 5. Sheet P-100. Plumbing Underslab Floor Plan UPDATED with larger SS piping under the Greenhouse to correct the sanitary flow invert leaving the building. The attached sheet replaces the previously issued sheet in its entirety.

Item 6. Sheet P-601. Plumbing Fixture Connection Schedule UPDATED to include

8” FCOs to the schedules. The attached sheet replaces the previously issued sheet in its entirety.

Item 7. Sheet P-901. Plumbing Combination Waste and Vent Isometric UPDATED with larger SS piping under the Greenhouse to correct the sanitary flow invert leaving the building. The attached sheet replaces the previously issued sheet in its entirety.

USDA ARS – Houma Sugarcane Research Greenhouse

Solicitation Addendum #3 7/10/2025

ATTACHMENTS

1. Reissue of Section 13 34 13 – 30 pages

2. Reissue of Section 13 34 14, Appendix A Points and Load List – 21 pages

3. Sheet C-101 Existing Conditions – 1 page, 30x42

4. Sheet C-301 Civil Profiles – 1 page, 30x42

5. Sheet P-100 Plumbing Underslab Floor Plan – 1 page, 30x42

6. Sheet P-601 Plumbing Schedules – 1 page, 30x42

7. Sheet P-901 Plumbing Combination Waste and Vent Isometric – 1 page, 30x42

END OF ADDENDUM 3

USDA Sugarcane Greenhouse Design 100098.00 10 July 2025 ADDENDUM 3

SECTION 13 34 13

GREENHOUSE STRUCTURE AND SYSTEMS

09/24

PART 1 GENERAL

1.1 RELATED DOCUMENTS

Drawings and general provisions of the Contract, including General and Supplementary Conditions and other Division?01 Specification Sections, apply to this Section.

1.2 RELATED SECTIONS

These sections are specifically related to this work and may need to be coordinated with other contractors.

a. Section 08 71 00 Door Hardware

b. Section 13 34 14 - Greenhouse Control System

c. Section 22 13 01 - Greenhouse Plumbing

d. Section 23 13 01 - Greenhouse Mechanical

e. Section 26 13 50 - Greenhouse Electrical Systems

1.3 PROJECT SUMMARY

Project involves a Base Bid scope and four Bid Options, as outlined in Section 01 11 00 SUMMARY OF WORK

1.4 SCOPE OF WORK

Work of this Section includes Greenhouse A, Greenhouse B, and the connecting Link (A-10):

a. Steel structure, including connection greenhouse and shade house structures.

b. Roof cladding

c. Sidewalls and Gable end cladding

d. Flashing at base and flashing and expansion joints at wall and roof junctions with adjacent construction.

e. Doors in the Greenhouse Structure

f. Ridge ventilators

g. Shade systems, motorized in roof, where noted.

h. Sidewall Light Spill system, motorized.

i. Sidewall Rollup Shade Systems, motorized.

j. Insect Screen and Bird Netting protected openings

k. Exhaust Fans

l. Evaporative Pad Systems

m. Evaporative Cooler Units

n. Motorized Shutters

o. VAF Fans

p. HAF Fans

q. Growing benches including options for Rolling and Fixed Benches.

r. Nutrient Injector Systems

s. Supplemental lights mounted on lighting tracks and Service lights.

t. Weather Station Mast

u. Maintenance & Cleaning Gantry

v. Coordination, commissioning, startup and user instruction services.

SECTION 13 34 13 Page 1

1.5 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Fabrication and Installation of Greenhouse; G

Submit coordinated shop drawings for the fabrication and installation of the greenhouse, structural prints sealed by a Professional Engineer licensed in the State of Louisiana, including: plans, elevations, sections, detail sections of framing members and glazing system, hardware, mounting heights, anchorage and glazing details, placement of all components supplied under this Section. Show and provide coordinated details of support members or other support provisions ventilators, shading, benches, unit heaters, VAF fans, as well as all other overhead equipment.

Shop drawings must be submitted in one single coordinated set, including all systems and components of this division and allowing for the work of related divisions that are within the greenhouse perimeter.

Anchorage Drawings: Prior to the erection of the greenhouses, the greenhouse supplier must provide anchorage drawings per Specification Section 05 05 20 for the greenhouses signed and sealed by a Professional Engineer licensed in the State of Louisiana.

SD-03 Product Data

Installation Instructions; G

Manufacturers Certifications or documentation; G

Submit manufacturer's product data, installation instructions, use limitations and recommendations for each product and system used.

Provide manufacturers' certifications or documentation showing that products and systems comply with requirements. List and describe features of control systems, performance, and operating characteristics.

SD-04 Samples

Structural Members; G

Glazing System Members; G

Doors; G

Flashing; G

Foam Sandwich Panel; G

Cladding; G

SECTION 13 34 13 Page 2

Shade Cloth; G

Insect Screening; G

Screen Framing; G

Equipment Marking and Tagging; G

Provide samples of finish on structural members, glazing system members, doors and flashing. Provide samples of finish on foam sandwich panel in lower sections of walls and partitions. Provide samples of cladding, shade cloth, insect screening, and screen framing. Provide samples of equipment marking and tagging. Minimum size of samples, 1 ft long or 1 ft by 1 ft, as appropriate.

SD-05 Design Data

Structural Calculations; G

Submit structural calculations for the greenhouse signed and sealed by a Professional Engineer licensed in the State of Louisiana, along with signed and sealed shop drawings.

Demonstration of structural performance of all components of the greenhouse structure and cladding and compliance of all materials, components and structural systems with the 2015 International Building Code provided by the greenhouse manufacturer. Provide a listing of required IBC chapter 17 Special Inspections required by the greenhouse design.

SD-10 Operation and Maintenance Data

Operation and Maintenance Manuals; G

Provide Operation and Maintenance Manuals per specification section 01 78 23, listing operating and maintenance instructions, emergency instructions, safety considerations, parts listings, exploded views, parts sources, and circuit diagrams. Include list of all operating components and details.

SD-11 Closeout Submittals

Revise Shop Drawings and Resubmit As-built Drawings; G

Revise shop drawings and resubmit as built drawings per specification section 01 78 00, making use of field set marked up by site foreman. Collect and add as built drawings from all suppliers.

1.6 SUSTAINABLE DESIGN REQUIREMENTS

Refer to Section 01 33 29 SUSTAINABILITY REQUIREMENTS for Sustainable Design Requirements.

1.7 PERFORMANCE REQUIREMENTS

1.7.1 Design Requirements

a. Maintain post grid line locations and roof peaks as shown on the drawings. Maintain braced bay locations.

SECTION 13 34 13 Page 3

10 July 2025 BID ADDENDUM 3

b. Use materials of size and thickness indicated or, if not indicated, as required to produce strength and durability in finished product for use intended.

c. Design and fabricate components to support design loads indicated and/or required to comply with requirements of authorities having jurisdiction over Project.

d. Design modifications:

e. May be proposed by the manufacturer to satisfy performance requirements.

f. Must conform to design and specified durability and strength.

g. Must maintain profiles and alignments indicated.

h. Must be submitted to the Government for review.

1.7.2 Structural Performance

Design hot dipped galvanized steel greenhouse structure in accordance with the AISC, LFRD Manual of Steel Construction, Third Edition and other applicable codes and standards.

1.7.3 Design Aluminum Glazing System

Design aluminum glazing system in accordance with the "Specifications for Aluminum Structures," The Aluminum Association Inc., most recent edition.

1.7.4 Deflections

Deflections: Submit deflection calculations for aluminum glazing system and for individual components, including purlins, girts, gutters, glazing bars. Do not exceed deflection limits of applicable codes nor those imposed by serviceability considerations. In general, do not exceed L/120 unless serviceability considerations impose more severe deflection limits.

Submit deflection calculations for new galvanized steel trusses and purlins. Do not exceed deflection limits of applicable codes nor those imposed by serviceability considerations.

1.7.5 Design Loads

Calculate design loads in accordance with ASCE 7-10 "Minimum Design Loads for Buildings and other Structures". Allow for site specific wind load, snow load and seismic load. Allow for overhead mechanical and electrical equipment (minimum 5 psf UDL dead load), in addition to dead and live loads as calculated (these loads to be considered together with gravity loads but not with wind uplift). Design Data (IBC 2015, ASCE 7-10) to be included in Structural Calculations Submittal:

a. Snow Loads: Ground Snow Load, pg = 0 psf

b. Wind Loads: Basic Wind Speed (3 second gust) Category II Vult = 150 mph Wind Exposure Category: C

c. Seismic Mapped Acceleration Parameters per ASCE/SEI 7

SECTION 13 34 13 Page 4

d. Ss = 0.085

e. S1 = 0.049

f. Risk Category: II

g. Site Class: E

h. Seismic Importance Factor: Is = 1.0

i. Site Coefficients:

i) Fa = 2.4

ii) Fv = 4.2

j. Seismic Design Category: B

k. Spectral Response Acceleration Parameters:

i) SDS = 0.135

ii) SD1 = 0.137

l. Live Loads:

m. Minimum Roof Live Load, Lr = 12psf applied uniformly across the entire roof structure.

n. In addition to the above, roof bars to be sized to carry a 100lb concentrated load at the center of the span.

o. Gantry Wheel Load per EN 130310-1 (2020) = 1.5kN (337 lbf vertical) (for each wheel of the service-vehicle. 400 lbf horizontal at each gutter end stop.

p. Gantry Transfer Trolly = 1250 lbf vertical at each wheel of the transfer trolly

q. Live Crop Load: 5 psf UDL

1.7.6 Load Combinations

The individual load cases shall be considered to act in any combination.

Load combination factors may be applied where permitted by the applicable code.

1.7.7 Lateral Bracing

a. Structure shall include adequate bracing for the lateral support of structural members and framing, and for stability of the structure for resistance to wind forces and seismic loads.

b. Locations of lateral bracing are shown on the drawings and must be respected.

c. Lateral drift shall be limited to H/500 at glazed walls and braced bays.

d. Lateral drift shall be limited to H/200 in all other areas.

SECTION 13 34 13 Page 5

1.7.8 Thermal Movements

a. Provide construction that allows for thermal movements resulting from the following: maximum change (range) in ambient and surface temperatures by preventing buckling, opening of joints, overstressing of components, failure of connections, and other detrimental effects. Base engineering calculation on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

b. Temperature Change (Range): 120 Deg F ambient; 180 DegF material surfaces.

1.7.9 Control Corrosion

Prevent galvanic action and other forms of corrosion by insulating metals and other materials from direct contact with incompatible materials.

1.8 QUALITY ASSURANCE

1.8.1 Manufacturers Qualifications

Manufacturer shall have a minimum of 5 years' experience in fabrication and erection of glazed structures for similar projects.

1.8.2 Installation Qualifications

Greenhouse installer shall have a minimum of 5 years' experience in the erection of glazed structures for similar projects.

1.9 DELIVERY, STORAGE, AND HANDLING

a. Protect materials during delivery, storage and handling to comply with manufacturers' directions and as required to prevent damage and deterioration. Store all greenhouse components, including but not limited to, glass and aluminum indoors, away from rain, snow and condensing conditions.

b. Take care to avoid water staining of aluminum extrusions. All stained aluminum will be rejected by the government.

c. Do not leave goods packaged and stored outdoors. If goods need to be left outside for a time prior to installation, goods shall be unpacked and separated on timber, so no two pieces of aluminum are in contact allowing moisture staining.

d. In storage, do not place aluminum with other metals. Use wood-faced shelving, racks, and bins.

e. Store away from caustics, nitrates, phosphates, and acids.

f. Upon receipt of deliveries, materials should also be inspected for signs of wetness to avoid the possibility of water staining. This should include looking for wet packaging or pallets.

g. Do not store aluminum near obvious water sources such as steam or water pipes, and keep it at a reasonable distance from open doors and windows.

SECTION 13 34 13 Page 6

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

The greenhouse shall have an aluminum glazing system providing 4 edge support of all glass and acrylic panels.

2.1.1 Design Requirements

The hot dipped galvanized steel truss bottom chord shall support a roll formed strut system or HSS framing system, and as necessary to support overhead mechanical and electrical equipment shown on drawings and listed in the specifications. The roll formed strut system or HSS system shall be sized to carry the overhead mechanical and electrical loads and the plant material loads simultaneously.

Glass and acrylic panels shall be supported on four edges and installed in an aluminum bar and cap system on slopes with a gasketed aluminum bar and cap system on vertical surfaces. Vents shall be provided with bulb seals and end seals.

All penetrations through partition walls and exterior walls shall be sealed. Air exchange rates will be tested.

a. Performance standards: Entire enclosure shall have an infiltration rate not exceeding 0.75 air change per hour, with an exterior wind velocity of 15 mi/h and an outdoor air temperature of 32° F (or a temperature differential inside to outside of 40 F°).

Infiltration testing to ASTM E741-11.

2.1.2 Greenhouse Manufacturers (In alphabetic order)

Albert J. Lauer Inc.

5200 211th Street West Farmington, MN 55024 www.ajlauer.com Tim Lauer tim@ajlauer.com (651)423-1651

Certhon ABC Westland 555 2685 DG Poeldijk +31 6 5152 9962 www.certhon.com Martin Veenstra martin.veenstra@certhon.com

DeCloet Greenhouse Mfg. Ltd.

Subsidiary of BFG Supply Co, Burton, OH 1805 Charlotteville West Qtr. Line, Simcoe, Ontario, N3Y 4J9 Canada

(519) 582-3081 www.decloetgreenhouse.com Patrick Gelineau patrickg@decloetgreenhouse.com

Deforche Construct NV Gentseheerweg 108 - 8870

SECTION 13 34 13 Page 7

Izegem - Belgium http://www.deforche.be/ Pascal Vangampelaere +32 (0)496 29 05 87 pvangampelaere@deforchegroup.com

GGS Structures Inc.

3559 North Service Rd Vineland Station, ON L0R 2E0 Canada

(905) 562-7341 http://ggs-greenhouse.com Gerry Harrison gharrison@ggsstructures.com

Havecon North America Inc 360 York Road, Unit 3 Niagara on the lake, Ontario L0S 1J0 Canada (732)939-9650 Justin Lukoff Justin@havecon.com https://havecon.com/

Prins USA, Inc.

19315 Carrico Mills Rd.

Stevensburg, VA 22741 O: (540) 399-1768 C: 309.533.2331 (Jason Kamphuis) jason@prinsusa.com

Prospiant (ThermoEnergy) 5513 Vine Street Cincinnati, OH 45217

(513) 242-0311 www.prospiant.com Gord Bonisteel gbonisteel@prospiant.com (519)890-8702

Van Wingerden Greenhouse Co 4078 Haywood Road Mills River, NC 28759

(828) 891-7389 x118 Josh Hamill josh@van-wingerden.com www.van-wingerden.com

2.2 MATERIALS AND COMPONENTS

2.2.1 Aluminum

a. Framing Extrusions, including frames, ties, purlins, girts, posts, beams, gutters: Alloy 6061 T6 or 6063 T5

b. Glazing System, including 4mm SG glass bar base and bar cap, , ridge, vent top and bottom rail, gutter adapter, sill, end bar:

Alloy 6005-T5, 6061-T6, 6061-T5 , 6063-HS, or 6063-T5

c. Sheet: Alloy 3003-H14, Alloy 6005 any temper, 6061 any temper, 6063 any temper

SECTION 13 34 13 Page 8

d. Plate: Alloy 6061 T6 or T5 Bar Stock or Alloy 6063 T54 Bar Stock

e. Anodizing: Clear anodizing 0.0004 inch on doors, Mill finish on flashing, sheet and plate.

2.2.2 Steel

a. Structural Steel: Hollow Structural Sections, Class C, 50ksi minimum specified yield

b. Truss members shall be factory welded from steel tube.

c. Tubing, square HSS to ASTM A 500/A500M-07, Grade A, 50ksi min specified yield.

d. Sway bracing, HDG or stainless-steel: Solid rod, as shown on drawings.

e. Galvanized coating basis of design: ASTM A123 / A1234M-17.

f. Sheet steel: hot dip galvanized roll formed shapes to ASTM A1011/A1011M-12b.

g. Plate: to ASTM A514/A514M-05(2009)

h. Welding: by AWS or CWB certified structural steel welding facility, under the direct supervision of an AWS or CWB certified welding engineer.

i. Field fabrication: No field fabrication of galvanized steel will be permitted without written permission from the Engineer.

j. Maintain on file, certified copies of mill reports covering chemical and physical properties of steel used in this work.

k. All Steel other than stainless steel shall be hot dip galvanized after fabrication.

2.2.3 Fasteners

a. Structural fasteners: Hot dip galvanized or 300 Series Stainless Steel.

b. Exterior glazing system fasteners: 300 Series Stainless Steel.

c. Concealed fasteners: hot dip galvanized or 300 Series Stainless Steel.

d. All other fasteners: 300 Series Stainless Steel.

e. Anchor bolts: This division to supply and install all anchor bolts to attach greenhouse structure to concrete support structure.

f. Anchor bolts to be preset to concrete reinforcement steel and inspected prior to concrete pour per ACI Standards, or utilized an epoxy adhesive system proportioned to meet the calculated and required loading conditions. Adhesive anchors shall consist of a threaded anchor rod, nut, and washer, and an injectable adhesive

SECTION 13 34 13 Page 9 material.

g. Anchor rods to be furnished with chamfered ends so that either end will accept a nut and washer. Manufactured to meet the following requirements: 1. ISO 898 Class 5.8 2. AISI 304 or AISI 316 stainless steel, meeting the requirements of ASTM F 593 (condition CW) or Hot dipped galvanized steel.

2.2.4 Cladding System

a. Roof areas to be tempered glass in aluminum bar system with integral PVC seals.

i. Single layer fully tempered glass

ii. Fully tempered float glass to comply with ASTM C1048, Kind FT, Condition A, Type 1, Class 1, Quality q6 iii.4mm minimum thickness.

iv. low iron

v. 70% haze

vi. with anti-reflection coatings on both faces.

vii.Perpendicular light transmission to exceed 97% and hemispherical light transmission to exceed 89%.

viii. Glass thickness and dimensions to meet cladding loads per Part

1.6.5.

ix. Lapped glass will not be accepted. Panes need to be full length from gutter to ridge/ vent bottom rail, or utilize a gasketed bar system with 4 side support.

b. Exterior sidewalls and gable walls to be tempered glass in aluminum bar system with integral seals.

i. Mill Finish aluminum glazing system with screwed down pressure caps. Visible screw heads are acceptable.

i) Stainless Steel screws and hardware.

ii) Provide gasketing with four edge support, and sealing for airtight and watertight installation.

iii)Outer glass seal: Neoprene gasket, EPDM gasket, or shimmed butyl tape wet seal.

iv) Inner glass seal and edge block: Neoprene or EPDM gaskets.

ii. Single layer fully tempered glass

i) 4mm minimum thickness.

ii) Fully tempered float glass to comply with ASTM C1048, Kind FT, Condition A, Type 1, Class 1, Quality q6 iii)low iron

iv) 70% haze

v) with anti-reflection coatings on both faces.

vi) Perpendicular light transmission to exceed 97% and hemispherical light transmission to exceed 89%.

vii)Glass thickness and dimensions to meet cladding loads per Part

1.6.5.

iii.Lapped glass will not be accepted. Panes need to be full length from gutter to ridge/ vent bottom rail, or utilize a gasketed bar system with 4 side support.

c. Exterior knee wall: 16mm insulated foam sandwich panel in base walls (to 36 inch AFF): aluminum laminated on hardboard or painted galvanized steel with closed cell insulating foam.

Install in Aluminum glazing bar system. Provide closure angle at base to seal to concrete floor.

SECTION 13 34 13 Page 10

d. Interior partition cladding:

i. Single fully tempered clear float glass, 4mm minimum thickness.

ii. All interior partition glass to be low iron.

iii. Option 1 Four-sided support utilizing gasketed aluminum cap system.

iv. Option 2 Two sided support with aluminum H came between panes utilizing gasketed aluminum cap system.

v. Lapped glass will not be accepted.

vi. Kneewall to 36 inch

i) Option 1) 0.090 inch thick clear anodized aluminum sheet.

ii) Option 2) Same material as provided for exterior knee wall, white both sides.

vii.Partition cladding system to be installed in the plane of the centerline of the partition columns and between the columns.

viii. Columns and frames to be accessible from either side of the partition to allow for attachment of supports for heating, lighting and other overhead equipment.

e. Condensation system:

i. Provide system of integral gutters in roof bars, purlin bars, vent bottom rails and gutter adapters, effective at collecting condensate from the glazing panels and weeping to under-gutter drip channels.

ii. Provide drip collectors integral with aluminum gutters effective at collecting condensate from the gutters and weeping to the condensate drains, as shown on drawings. Provide a gas exchange free means of separation of condensate between compartments. Water traps are required if condensate collectors cross compartment partitions.

iii. Provide complete system to drain condensate to either floor drains, hub drains, or gutter downspouts as appropriate. Do not drain over the floor surface.

2.2.5 Gutter Downspout

a. Provide and install hot dipped galvanized gutter posts with internal drainage system from the gutter elevation to a welded outlet 10 inch above the floor level. Gutter downspout post must be fabricated to be free draining and not hold any water. Provide 6 inch outlet or adapter (4.5 inch o.d.) from posts to connect into 6 inch PVC storm drainage piping.

b. Provide drip condensation system drainage connections to downspouts

c. Connect gutter downspout to 6 inch riser from sub-grade PVC storm drainage piping by Section 221301 contractor using mechanical joint connection.

2.2.6 Flashing, Sealing and Expansion Joints

a. Exterior and interior kneewall flashing: 1/16 inch minimum thickness aluminum sheet, preformed, covering junction between sidewall glazing sill and top of slab.

b. Connection at junction of greenhouse to adjacent building: Rubber expansion joint flashing system, aluminum and rubber preformed units with factory made junctions and 1/16 inch minimum thickness aluminum sheet, install with preformed cover flashing.

SECTION 13 34 13 Page 11

c. Expansion joint(s): Rubber expansion joint flashing system, aluminum and neoprene rubber preformed units, as shown on drawings with factory made junctions and 1/16 inch anodized or mill finish aluminum sheet, preformed cover flashing, as shown on drawings.

d. Neoprene or EPDM glazing bar and bar cap push-in gaskets:

manufacturers standard gaskets to fit gasket slot in aluminum extrusion. Install by crowding gasket into gasket slot and crimping slot legs near ends to retain push-in gasket in place.

e. Flashing and building junction Sealants: silicones sealants to be applied strictly in accordance with manufacturers' recommendations, to be used where noted and where required to control water and air infiltration.

f. Performance standards: Entire enclosure shall have an infiltration rate not exceeding 0.75 air change per hour, with an exterior wind velocity of 15 mi/h and an outdoor air temperature of 32° F (or a temperature differential inside to outside of 40 F°).

Infiltration testing to ASTM E741-11.

g. Terminations and Junctions: Provide closure members at ridges, corners, eaves, sills and gutters, designed to connect with adjacent members and to provide weatherproof terminations and junctures. Corner junctions shall be mitered and rounded where possible. Flashing details at top of sidewalls, at floor and at access panel locations to be fully sealed and caulked, with no openings, gaps, cracks or holes.

2.2.7 Doors and Frames

a. Man Doors

i. Provide and install doors, frames and hardware for doors located in glazed walls. Doors to be wide stile, anodized aluminum, with 1-inch anodized aluminum foam insulated sandwich kick panels, welded corners. Frame, 1 ¾-inch x 4-inch with 13/16-inch with muntin bar.

ii. Exterior doors shall have 5/8inch IG units, thresholds sealed to provide an effective water infiltration barrier, and ADA compliant low height thresholds.

iii. Interior doors shall have 4mm or thicker tempered glass upper panels.

iv. Door Hardware to be provided by contractor responsible for Specification section 08 71 00 and installed by this section per hardware groups scheduled per the door schedule on drawing GA100.

v. All doors are to be prepared for keycard readers and associated hardware where scheduled.

vi. Door frames are to be prepared for door switches, for connection to the greenhouse computer control system.

vii. Double doors to have removable center mullion.

b. Glazed Sectional Overhead Doors (exterior)

i. See Drawing GA100 for Door Schedule and sizes.

ii. Door Assembly: Stile and rail assembly secured with 1/4 inch (6

mm) diameter through rods.

iii Panel Thickness: 1-3/4 inches (44 mm).

iv. Center Stile Width: 2-11/16 inches (68 mm)

v. End Stile Width: 3-5/16 inches (84 mm)

vi. Intermediate Rail Pair Width: 3-11/16 inches (94 mm).

SECTION 13 34 13 Page 12 vii.Top Rail Width: 2-3/8 inches (60 mm).

viii. Bottom Rail Width: 3-3/4 inches (95 mm).

ix. Aluminum Panels: 0.050 inch (1.3 mm) thick, aluminum.

x. Stiles and Rails: 6063 - T6 aluminum.

xi. Springs: 10,000 cycles.

xii.Glazing: Clear 1/8 inch (3 mm) tempered glass above 3' with clear anodized aluminum bottom sectional leaf to match kneewall

xiii. Finish and Color: Anodized Finish: Clear anodized.

xiv.Windload Design: Provide to meet the Design/Performance requirements specified.

xv. Hardware: Stainless-steel hinges and fixtures. Ball bearing rollers with hardened steel races.

xvi. Lock: Interior Stainless-Steel single unit.

xvii. Weatherstripping:

i) Flexible bulb-type strip at bottom section.

ii) Flexible Jamb seals.

iii) Flexible Header seal.

xviii. Track: Provide track as recommended by manufacturer to suit loading required and clearances available.

xix. Manual Operation: Chain hoist.

xx. Electric Motor Operation: Provide UL listed electric operator, size and type as recommended by manufacturer to move door in either direction at not less than 2/3 foot nor more than 1 foot per second. Operator shall meet UL325/2010 requirements for continuous monitoring of safety devices.

i) Entrapment Protection: Required for momentary contact, includes radio control operation.

ii) Photoelectric sensors monitored to meet UL 325/2010.

xxi. Operator Controls:

i) Push-button operated control stations with open, close, and stop buttons.

ii) Surface mounting.

iii)Interior location.

2.2.8 Ridge Vent Ventilators - Grouped Drive, Rotary Shaft (used in small compartments)

a. Provide ridge sash vents on both sides of each ridge of ridge vented greenhouses. In each compartment, group East vents separate from the West vent group. Ridge vents to be 4' minimum, wide with a weather tight hinge, and weather tight fit at the vent header and vent ends. Provide EPDM or Neoprene vent bottom rail seals.

Glaze vent with 16mm acrylic roof system.

b. Vent must open at least 5 degrees above horizontal measured from peak to top of vent bottom rail.

c. Rack and Pinion vent openers: steel U profile rack with alloy pinion gear, for 1 in pipe shaft, installed on 1.5m approx., on center.

d. Drive shaft: 1 in hot dip galvanized pipe.

e. Shaft bearings: 1.315-inch pillow block bearings, suitable for the drive shaft, with high temperature seals, installed on 12 ft approx. on center, at roof truss locations.

f. Drive motor, two per compartment: 208V 3 Phase gear motor, 3.8 RPM minimum (refer to Points and Load List for size), dynamic

SECTION 13 34 13 Page 13 self-locking double worm gear, complete with built in limit switches and repeater units. Supply complete with side mounting plate and chain couplings to bolt to 1 in galvanized pipe drive shaft.

g. Angle Drives: 1:1 ratio Angle drives for 1-inch galvanized pipe drive shaft complete with mounting lugs.

h. Approved alternate: Provide a 28 RPM minimum geared drive motor and a 21:1 or 31:1 angle drive at rack drive shaft end.

2.2.9 Ridge Vent Ventilators - Grouped Drive, Push Rod (used in large compartments)

a. Provide ridge sash vents on both sides of each ridge of ridge vented greenhouses. In each compartment, group East vents separate from the West vent group. Ridge vents to be 4' minimum, wide with a weather tight hinge, and weather tight fit at the vent header and vent ends. Provide EPDM or Neoprene vent bottom rail seals.

Glaze vent with 16mm acrylic roof system

b. Vent must open at least 5 degrees above horizontal measured from peak to top of vent bottom rail.

c. Double Truss Rail U profile galvanized steel rack with alloy pinion gear, for 1 in pipe shaft, installed on top of energy bar truss 12 ft approx., on center. Provide 1 inch push rod and roller bearing supports on top of energy bar truss.

d. Galvanized Steel or Aluminum vent arm push rods from truss rail pushrod to vent bottom rail, 4 per truss.

e. Drive shaft: 1 in hot dip galvanized pipe.

f. Drive motor, 2 per compartment: 208V 3 Phase gear motor, 3.8 RPM minimum speed opening, with a 2x or faster closure time. (refer to Points and Load List for size), dynamic self-locking double worm gear, complete with built in limit switches and repeater units.

Supply complete with side mounting plate and chain couplings to bolt to 1 in galvanized pipe drive shaft.

2.2.10 Accordion Vent Insect Screen

a. Insect screens in ridge vents provide accordion type insect screen material which automatically deploys on vent opening and retracts on vent closing.

b. Screen materials: Screen opening size 150x350µm (0.15x0.35mm)and to be UV resistant.

c. Provide and install effective retention devices to ensure screens stay in vent aperture without pinching or jamming.

d. Provide and install effective seals at the entire perimeter of each accordion screen, ensuring that any cracks or gaps are no larger than the screen mesh opening size.

e. Prepare a mockups of the insect screen installation in ridge vent.

The mockup should demonstrate seals on all edges do not have gaps

SECTION 13 34 13 Page 14 any larger than the specified screen mesh opening size. Mockups to be reviewed and accepted by the Government prior to proceeding with the work.

2.2.11 Sidewall Insect Screen Wall

a. Provide aluminum or galvanized steel structure to provide a plenum and support insect screening on the exterior of sidewall ventilation openings. Insect screen area must cover the inlet sidewall area as shown on the drawings.

b. Screen materials: suitable for controlling whitefly and some thrip exclusion and to be UV resistant.

c. Opening size to be no greater than 150x350µm (0.15x0.35mm)

d. Provide and install effective retention devices to ensure screens stay on the screen wall during wind and snow events.

e. Provide and install effective seals at the entire perimeter of each screen wall, ensuring that any cracks or gaps are no larger than the screen mesh opening size.

2.2.12 Shade & Energy Curtain System

a. Each of the greenhouse compartments shall be provided with a flat sliding shading system in the roof area located on the top of the truss. Install system(s) as per the drawings.

b. Top Layer Horizontal shade cloth to be knitted reflective and moisture permeable cloth, fire retardant. UV stable under all kinds of greenhouse claddings. Shade Level of 54% per NEN 2675 in direct light, +/- 5% listed value. BOD Ludvig Svensson Harmony

4647 FR

c. Drive motor in roof areas: 208V 3 Phase gear motor, maximum 5 RPM, dynamic self locking worm gear, complete with built in limit switches. Supply complete with side mounting plate and chain couplings to bolt to 25mm galvanized pipe drive shaft.

d. Cable Drive System

e. Drive cables: 1/8 inch 7x19 stainless steel aircraft cable.

f. Return pulleys: 3in of diameter with ball bearings, supplied complete with mounting bracket.

g. Support Wires: stainless steel, white or clear nylon monofilament.

h. Leading edge tube or extrusion: ¾ inch diameter galvanized steel or aluminum tube, or extruded aluminum section with seal.

i. Cloth shall be hemmed or sealed at edges.

j. Effective seals to be provided at all shade panel edges.

2.2.13 Rollup Perimeter Light Spill Curtain System

a. Where shown on drawings and as indicated on the Points and Load

SECTION 13 34 13 Page 15

List (Appendix 1 to Specification Section 13 34 14), greenhouse compartments shall be provided with a perimeter light spill curtain system.

b. Roof system is NOT required, only perimeter walls where shown.

c. Roll-up light spill cloth shall be white on exterior and interior.

BOD Ludvig Svensson Obscura 10070 R FR W

d. Roll-up light spill cloth shall be cut straight and true and the edges are to be heat sealed with a hot knife.

e. Effective light traps to be provided at all corners.

f. Drive motor for roll-up curtains: tube motor, for use with 2in aluminum pipe, 120V, 1/5 hp, complete with built in limit switches. Tube motor to be water proof suitable for outdoor application. Supply complete with installation hardware and guide track for motor. Basis of Design: Lock RMA 20.0512, 120V 1 Phase, 50 Nm, 12 RPM, 280W.

g. Drive tube: 2 inch outside diameter Aluminum shaft.

2.2.14 Horizontal Air Flow Fans (HAF)

a. Provide HAF fans in corridors, mounted off the truss bottom chord, as shown on the drawings.

b. Basis of design: Shaffer Ventilation Equipment VS12FMT

c. Fans: diameter, 12" blade diameter, 1554 cfm, 120VAC, single phase variable speed motor, with aluminum blades and white enamel powder coated guards, galvanized steel brackets and all other steel hardware.

d. Manual Variable Speed Controls: Provide a wall mounted variable speed control head to match the variable speed requirements of the fan. This may be a 120VAC or 0-10V controller depending on the provided fan. Coordinate wiring with 26 13 01 contractor.

e. Mounting Bracket: Provide appropriate mounting bracket and structural support within the greenhouse.

2.2.15 Vertical Air Flow Fans (VAF)

a. Provide VAF fans in greenhouse compartments, mounted off the truss bottom chord, as shown on the drawings.

b. VAF Fans to pull air up vertically and blow air in a 360 degree pattern horizontally.

c. Fans: 25.5 in diffuser diameter, 16.5 inch blade diameter, 215W (maximum), 120VAC, single phase, with polymer blades and enamel coated baskets, galvanized steel brackets and all other steel hardware. Minimum Airflow at maximum speed: 1500 CFM, Variable Speed motor.

d. Manual Variable Speed Controls: Provide a wall mounted variable speed control head to match the variable speed requirements of the

SECTION 13 34 13 Page 16 fan. This may be a 120VAC or 0-10V controller depending on the provided fan. Coordinate wiring with 26 13 01 contractor.

e. Mounting Bracket: Provide appropriate mounting bracket and structural support within the greenhouse.

2.2.16 Exhaust Fans

a. 36 inch composite exhaust fans, galvanized finger guard, aluminum motorized damper.

b. Fan System:

c. Cast aluminum airfoil propeller blades or Thermoplastic blades

d. 208V 3 Phase ECM direct drive motor.

e. 18 cfm/w or better at 0.1 inch SP

f. Aluminum motorized insulated damper with silicone seals: 24VAC drive open/ drive close operator

g. Basis of Design Damper Tamco Series 9000 MR

h. Basis of Design Operator: Belimo GMB24-3

i. Fan Selection:

j. 36 inch Fan

i) 10,840 CFM at 0.1 inch SP, 545 W

ii) Basis of Design: Munters VX36HE

2.2.17 Evaporative Pad System

a. Pad height varies from 4' to 8' high as shown on drawing

b. 6 inch thick cellulose evaporative cooling pad coated both surfaces with black anti-algae reinforcement.

c. Maximum pressure drop of .06 inch water gauge at 270 ft/min pad velocity

d. PVC or stainless steel header, with distribution pipe of PVC.

e. Stainless steel or PVC gutter with integral reservoir. Minimum reservoir capacity of 0.75 gallons per sqft of pad area including water storage in gutter under the pads.

f. Pad pumps: 120VAC, sized for 15% bleed-off maximum, 0.5 gpm per linear ft of pad.

g. Pad system per greenhouse zone with independent pumps as shown on the points list.

2.2.18 Evaporative Cooling Units

a. Evaporative Coolers: Stainless-Steel cabinet construction with all internally-wetted parts to be non-corrosive per Stainless Steel

SECTION 13 34 13 Page 17 grade 304 construction or better, side discharge model with 12 in thick cellulose pad. Cooler to have variable-speed electronically commutated (EC) external-rotor motorized fan, 208VAC, 3 phases, with 0-10V speed-control interface. Cooler pump to be independently controlled directly via its 120VAC single phase power feed from greenhouse control system. Fan motor to be maximum 2200 W. Centrifugal fan to have airflow shown below assuming 0.6 in of wg internal pressure from inlet to double deflection louver discharge and an exhaust static pressure of 0.15 in of wg. Centrifugal fan motor to have minimum IP54 rating for exclusion of water and solids. Fan wheel to be made of corrosion resistant material. Cooler side and top panels to be removable for access to both sides of fan, water pump, integral 24VAC inlet water supply solenoid valve, 24VAC purge solenoid valve, low level switch and high level switch. Cooler to have purge cycle function, initiated by the computer control system. Coolers to have legs or skid channels to permit handling with fork lift. Cooler to have adjustable legs of grade 304 Stainless Steel with a minimum total height adjustment of 2.5". Coolers to have channel frame construction with lifting eyes and/or lugs to enable attachment of lifting eyes. Coolers to be air tight against the full static pressure of the fan, both suction and discharge sides.

b. Capacity: 6,500 CFM at 0.15" external static pressure at cooler exit.

c. Cooler inlet includes of an aluminum weather louver with incorporated bird screen. Weather louver is 4 in deep with integrated drainage in blades.

d. Thrip screen modules: Bolt-on pleated thrip screen modules. Screen material: LS Econet 1515, opening size 15 x 15 µm.

e. Evaporative pad cooling material to be factory installed and to be of the rigid cellulose type, 12 in thick, 90% efficient at 500 fpm, with static pressure drop of 0.225 in wg. Evaporative media support structure to be fully removable through side of unit to facilitate cleaning of sump.

f. Coolers to have unit-mounted disconnects for all power feeds to fan and pump motors. All disconnects and other factory-mounted electrical enclosures and to be weather proof (NEMA 3R) or to have equivalent weather protection.

g. Cooler to be have electrical safety certification for use in the USA (UL / ETL / CSA, etc.).

h. Cooler outlet ductwork to be supplied with the cooler units consisting of assemblies and components external and internal to greenhouse structure.

i. External ductwork, consisting of a vibration isolation strip, made of weather-resistant elastomer, suitable for exterior use, air tight and water tight, a square to 18" x 76" rectangular transition with internal guide vanes lead the cooled air to the greenhouse space. Ductwork to 300 series stainless steel sheet metal with a minimum of four equally-spaced internal guide vanes to be welded and/or riveted in place. Installing contractor to install complete with support struts and brackets, to connect to

SECTION 13 34 13 Page 18 the greenhouse support structure.

j. Internal ductwork to consist of motorized insulated damper and double deflection diffuser.

k. Double-deflection discharge diffuser downstream of damper to be all aluminum and have minimum 1" deep airfoil type manually operated directional control blades.

l. Stainless steel 6" by 76" 90-degree vertical deflection duct to be bolted to upper side of the double deflection discharge diffuser.

m. Insulated motorized damper of anodized aluminum construction, high humidity, with silicone perimeter and blade seals, low leakage.

n. Damper Actuator: 24VAC, floating signal, with lever linkage and mounting plate to adapt to motorized damper by installing contractor. Actuator: Belimo.

o. Water line to cooler units: ¼ in stainless steel, connected to potable cold water line in greenhouse. Provide water shutoff valve and compressed air valve and shutoff for winterization and blowout.

p. Basis of design, Sigma Green, model #SC-EC-80.

2.2.19 Motorized Dampers

a. Motorized Damper: aluminum construction, opposed blade operation, high humidity, with silicone perimeter and blade seals, low leakage, stainless steel hardware.

b. Damper actuators: floating point 24VAC c/w linkage to motorized damper

c. Basis of Design: Tamco Series 1000-MR Damper with Belimo GMB24-3 Actuators

2.2.20 Lighting Supports

a. Lighting support tracks of Hot Dip Galvanized Steel channel or HSS: as shown on drawings; spanning from truss to truss, carry the lighting fixtures. To be connected to the bottom chord of the roof trusses.

b. Size steel channel or HSS tracks to carry the number of supplemental lighting fixtures on each run per the drawings, in addition to other mechanical and electrical equipment shown.

Minimum suspended load is 6 psf uniformly distributed over the entire compartment.

c. All hangers, bracket, cables and fasteners for the supports shall be aluminum or stainless steel.

d. Provide all hardware and hangers with seismic restraint fasteners.

SECTION 13 34 13 Page 19

2.2.21 Benching

a. Fixed Top Benches

i. Provide benches as per drawings. Benches to have legs as shown on drawings, adjustable feet, and to be adequately braced for stability with a full crop load. Legs to be spaced to meet loading and deflection criteria and not more than 48in apart.

ii. Adjustable height benches to be dual height: 32" in high position and 14" in low position to the bench mesh top. Fixed top benches to be 32" high to the bench mesh top

iii. Materials: Legs, frame and bench mesh to be of hot dip galvanized steel or aluminum. Edge rail to be of aluminum.

iv. Tops: hot dip galvanized expanded metal; ¾ inch (10 13), with cross supports sufficient to provide a load capacity of 40 psf with no more than 1/8 inch deflection. Maximum span between cross supports: 20in. Expanded metal to be supplied in one piece across the top. Junction must occur at a cross support.

v. Edge rail: of extruded aluminum. Junction of edge rails to be rounded.

vi. Legs of tubular round or square HDG steel or aluminum, recessed a minimum of 2in from the bench edge.

vii Legs to be continuously adjustable to allow for 3-inch total variation in finish floor elevation, using a screw adjustment device. 2-inch by 4-inch base plates are to be anchored to the floor using 2 concrete anchors per baseplate.

viii. Bracing to be installed to maintain stability and bench location.

ix. Benches to be removable.

x. Benches shall be leveled to an accuracy of +/ 1/8 inch over the full length and width of the bench. A water level shall be used to check this.

b. Roll Top Benches

i. Provide 5'-0" and 6'-6" wide roll top benches as per drawings.

Benches to have legs as shown on drawings, adjustable feet, and to be adequately braced for stability with a full crop load. Legs to be spaced to meet loading and deflection criteria and not more than 48in apart.

ii. Bench height: to be 32 inch in height to the bench mesh top.

iii.Materials: Legs, frame and bench mesh to be of hot dip galvanized steel or aluminum. Edge rail to be of aluminum.

iv. Tops: hot dip galvanized expanded metal; ¾ inch (10 13), with cross supports sufficient to provide a load capacity of 40 psf with no more than 1/8 inch deflection. Maximum span between cross supports: 20in. Expanded metal to be supplied in one piece across the top. Junction must occur at a cross support.

v. Edge rail: of extruded aluminum. Junction of edge rails to be rounded.

vi. Legs of tubular round or square HDG steel or aluminum, recessed a minimum of 2in from the bench edge.

vii. Legs to be continuously adjustable to allow for 3- inch total variation in finish floor elevation, using a screw adjustment device.

viii. Roller tubes: 2-inch OD anodized aluminum pipe. Provide with two collars engaging a leg cross bar at each end of each tube to avoid migration of the tube. Roll tubes to be cut short at the cross-aisle end(s) to avoid a pinch hazard. Roll tubes to have coupling splices to join the two sections of roll top benches end

SECTION 13 34 13 Page 20 to end, when both benches are installed and at the same working height.

ix. Anti-tip brackets: to extend under at least two legs for each bench section. Provide sealed ball bearings as shown for smooth operation of anti-tip brackets.

x. Base plates to be anchored to the concrete floor with two threaded inserts, minimum ¼ inch thick, to protect the floor finish and reduce sliding. Pads to be permanently attached to the undersides of the base plates.

xi. Bracing to be installed to maintain stability and bench location.

xii. Benches to removable. Utilize a template to locate threaded concrete inserts for easy replacement.

xiii. Benches shall be leveled to an accuracy of +/ 1/8inch over the full length and width of the bench. A water level shall be used to check this.

c. Foam Flat Bench Supports

i. Provide and attach aluminum angle and tee supports for foam flats on bench tops where shown on plans. Verify spacing of channel supports with the government.

2.2.22 Supplemental LED Grow Lighting Fixtures

a. Provide a lighting plan with shop drawings submittal, delivering a light level of 500 µmol/s/m2 at 100% power and 80 % homogeneity or better at 48 inch above finished floor over the entire bench area.

b. Maximum 683W 277V broad horticultural spectrum, Minimum PPF: 1761 ?mol/s LED, Minimum Efficacy of 2.6 mol/J, linear light bar with passive radiator cooling, reflector, power supply, support hardware, 6' cord set and 15A 277V twistlock cord cap. Provide with low voltage 0-10V dimmer cord set.

2.2.23 LED Service Lighting Fixtures

a. 36W 277V 4000K, 48-inch 2 tube LED vaporproof fixture.

b. Nonmetallic housing with polycarbonate lens.

c. Gasketed design with stainless steel clamp fasteners.

2.2.24 Anodized Aluminum Infill Panels

a. Provide anodized aluminum infill panels, where indicated on the drawings and where required to accommodate pipe, duct and electrical penetrations through the glazed partition walls.

b. Coordinate the location of the panels and the work with Electrical and Mechanical install to facilitate connections and minimize the size and number of panels.

c. Division 22 and 23 to install pipes, ducts and other mechanical work, except as noted in this specification section.

d. Division 26 to install electrical conduit, wiring and electrical devices.

e. Receive site instructions and coordinate work with Division 22, 23

SECTION 13 34 13 Page 21 and 26 contractors to facilitate installation of their work in the greenhouse areas and to facilitate connections and minimize the size and number of panels.

f. All pipe penetrations must have appropriate sealing. Follow prescriptions of sections 22 05 17, 22 05 18, 23 05 17, 23 05 18 and 26 05 44.

2.2.25 Overhead Equipment Supports

a. Provide and install hot dip galvanized steel supports for overhead gutter heating pipes in the greenhouse compartments and greenhouse corridors, for mid-wall mounted heating pipes in compartments and for other overhead equipment included in this section.

b. Support to be made of 2-inch x 2-inch x ¼-inch steel angle (or stronger when required), as shown on the drawings, and to be located on the whole perimeter of each greenhouse compartment.

2.2.26 Weather Station Mast

a. 1 in hot dip galvanized pipe configured to mount the weather station provided by Section 13 34 14 Greenhouse computer control systems.

b. Mast will be hinged to allow lowering of the weather station to the ground.

c. The hinge and hardware mechanism are hot dipped galvanized or stainless steel.

2.2.27 Roof Maintenance & Cleaning Gantry

a. Provide a power operated roof maintenance gantry to roll in the gutters for the purpose of maintaining the exterior roof of the greenhouse. Gantry to support two 300 lb users and 120 lbs of equipment/ supplies.

b. Provide a power operated automatic roof cleaning gantry to roll in the gutters for the purpose of spray applying shade compound, removing shade compound, and physically cleaning the glass with rotary brushes and water. Provide a manual hose spray operator station to clean vent screens. Provide with:

i. Guides for hose and cable on the reels

ii. Gutter brushes

iii. Open window detection

iv. Dosing pump with spray boom for cleaning agents

v.…