APPENDIX C. Specification for PV Parking Canopy Structures

Transcription

1 APPENDIX C Specification for PV Parking Canopy Structures PART 1 GENERAL PART 2 PRODUCTS, MATERIALS AND COMPONENTS PART 3 EXECUTION VTA Project # Appendix C Page 1 of 11

2 PART 1 GENERAL 1.01 SCOPE: This section covers the furnishing and installation of the structures, foundations and all other items required to furnish and install a complete structural system capable of supporting solar panel installations DESIGN CRITERIA AND PERFORMANCE REQUIREMENTS: A. Structural framing for the Solar Canopies shall be designed in accordance with all applicable state and local building codes. The Solar Canopy Manufacturer ( Manufacturer ) shall provide written structural analysis prepared and certified by a Professional Engineer licensed in the Commonwealth of Massachusetts indicating that the structures and the foundations satisfy the required design criteria. At a minimum, the structure shall meet the following design criteria as specified by code: a. Dead Load: As Required by Code b. Roof Live Load: As Required by Code c. Snow, Wind and Seismic Loading: As Required by Code 1.03 QUALITY ASSURANCE: A. Installation shall be performed by experienced crews employed by the Manufacturer having a minimum of five (5) years experience erecting similar structures. The canopies shall be erected in accordance with Manufacturer s instructions and approved drawings. B. The structure shall be manufactured in accordance with standard approved practices. Testing shall be performed in accordance with ASTM standards, and test reports shall be certified and submitted by an independent test laboratory SUBMITTALS: A. Signed and sealed drawings and calculations shall be submitted by the Manufacturer prior to manufacturing. No ordering or fabrication of materials shall commence until submittal drawings are approved by the local building authority and the owner, unless otherwise directed by VTA. B. Manufacturer shall submit three (3) sets of signed and sealed drawings for approval. C. The submittal package shall include drawings and engineering calculations signed and sealed by a Professional Engineer licensed in the Commonwealth of Massachusetts in addition to a full equipment submittal. D. At a minimum, submittal drawings shall include the following sheets: VTA Project # Appendix C Page 2 of 11

3 a. Title/Cover Sheet b. Column Framing Plans c. Structure Elevations d. Beam/Truss Framing Details e. Column Anchoring Details f. Foundation Plans and Supporting Design Calculations g. Gutter Framing Details (if applicable) h. Solar Panel and Framing Plans and Details 1.05 MATERIAL DELIVERY, STORAGE AND HANDLING: A. Materials shall be delivered to the jobsite in Manufacturer s packaging. B. Access from unloading area to construction site shall be clear and unrestricted. C. Upon delivery, inspect and report any freight or handling damage to the Manufacturer immediately. Manufacturer cannot be held responsible for damages occurring during storage, prior to construction. PART 2 PRODUCTS, MATERIALS AND COMPONENTS 2.01 MANUFACTURER: A. The Manufacturer of the Solar Canopies shall have a minimum of 5 years experience in the design and installation of similar systems. B. Manufacturer of the Solar Canopies shall have installed over 100 MW of canopy and carport systems to date. C. The Manufacturer of the Solar Canopies shall have a minimum of 10 MW of experience in the design and installation of similar systems in Massachusetts and the Northeastern US states. D. The Manufacturer shall have a minimum of 5 MW of experience in the design and installation of similar systems in Massachusetts including industrial high -bay (14 +), long span installations intended for truck, bus and heavy equipment coverage and commercial dual tilt (12 +) installations intended for personal single occupancy vehicles GENERAL STRUCTURE DESIGN AND COMPONENT DETAILS: A. The structure shall be designed and detailed according to good engineering practices. The Solar Canopies shall be a series of connected solar modules which shall be supported by mounting rails, purlins and/or trusses/i-beams. Columns shall be located on center stripe between rows of parking (where applicable) with trusses/ibeams cantilevered to either side of the column for both aisle and perimeter configurations. VTA Project # Appendix C Page 3 of 11

4 B. Long-span canopies shall be used as specified on the proposed site layouts. C. A minimum clearance of 14 shall be maintained at the lowest point of the canopy trusses or beams (unless otherwise specified on the Site Layouts). D. Both aisle and perimeter canopies shall have nominal roof slopes between 1 and 10 degrees unless otherwise specified. E. Concrete used for foundations shall have a minimum 28-day compressive strength of 4,000 psi.. F. Designs shall be a dual tilt ( Y shape) canopy structure to conform to the Site Layouts for each site. G. Clearance shall be a minimum of 14 from bottom outer edge of structural member to top of asphalt, unless otherwise specified. H. All structural steel shall be a minimum of 30 above top of asphalt. I. Base plate and exposed anchor bolts and nuts minimum of 30 above top of asphalt. The 30 minimum elevation helps protect steel, welds and finishes from salt and water. J. The Solar Canopy shall be configured to maximize the solar output from the given area. The canopy layouts should conform to the site designs as shown on the Site Plans. K. The canopy of the structure should cover the areas shown on A0.1 Site Plan and act as a weather guard for parking lot users, with a water management system connected to the existing rainwater runoff collection system. L. The canopy structure shall use steel or aluminum for the support and rack components. M. Fasteners and hardware shall be galvanized or stainless steel. Ordinary carbon steel fasteners, wood and plastics shall not be use. N. All lighting fixtures will provide non-glare, focused down lights and provide minimum intensity levels of 0.5 to 1.0 foot candles at ground level over all the parking areas and be designed to comply with local requirements CONSTRUCTION SITE SURVEY: A. Before bidding the Work, the Contractor shall review the available subsurface information and visit the site to assess the site geometry, VTA Project # Appendix C Page 4 of 11

5 equipment access conditions, and location of existing structures and above ground facilities. B. The Contractor is responsible for field locating and verifying the location of all utilities prior to starting the work. Site survey to be provided by VTA showing topography and all above and below ground obstacles/utilities. Maintain uninterrupted service for those utilities designated to remain in service throughout the Work. Notify VTA of any utility locations that may require foundation relocations or structure design modification. C. Prior to the start of any foundation construction activity, the Contractor and VTA shall jointly inspect the site to observe and document the preconstruction condition of the site, pavement, existing structures and facilities FOUNDATION DESIGN REQUIREMENTS: A. Minimum of 4 anchor bolts with a minimum 1 ½ diameter or equivalent engineered method to assure structural foundation integrity. ASTM A36 or better exposed surfaces of anchor bolts, nuts and washers to be galvanized steel. Final foundation design, plans and details to be provided by Canopy Manufacturer and stamped by an engineer licensed in the Commonwealth of Massachusetts. B. Top of pier be a minimum of 30 above top of asphalt. C. Minimum volume for pier above grade to be 36 diameter x 30 height of reinforced concrete to protect structural integrity from vehicle bumpers. D. Piers to be constructed of reinforced concrete, air entrained, with a minimum compressive strength of 4,000 psi at 28 days. E. Footings to be constructed of reinforced concrete, air entrained, with a minimum compressive strength of 4,000 psi at 28 days FOUNDATION DESIGN SUBMITTALS A. At least 21 calendar days before the planned start of foundation structure construction, submit complete design calculations and working drawings to VTA for review and approval, unless otherwise instructed. Include all details, dimensions, quantities, ground profiles, and cross-sections necessary to construct the foundation structure. Verify the limits of the foundation structure and ground survey data before preparing the detailed working drawings. B. The drawings and calculations provided to VTA shall be signed and sealed by the Contractor's Professional Engineer. The Contractor shall have overall responsibility for both the design and the construction of the VTA Project # Appendix C Page 5 of 11

6 foundation DESIGN CALCULATIONS: The Contractor will also provide the design calculations which shall include, but not be limited to, the following items: A. A written summary report which describes the overall foundation design. B. Applicable code requirements and design references. C. Foundation structure critical design cross-section(s) geometry including soil/rock strata and water levels and location, magnitude and direction of design applied loadings, including slope or external surcharge loads. Information shall be based on geotechnical report(s) provided by VTA. D. Design criteria including, soil/rock shear strengths (friction angle and cohesion), unit weights, and drilled shaft diameter (if required) assumptions for each soil/rock strata. Information shall be based on geotechnical report(s) provided by VTA. E. Safety factors/strength factors (for Service Load Design) or load and resistance factors (for Load Factor Design) used in the design on the ground-concrete friction values, surcharges, soil/rock and material unit weights, steel, grout, and concrete materials. F. Seismic design earthquake acceleration coefficient. G. Design calculation sheets (both static and seismic) with the project number, foundation structure location, designation, date of preparation, initials of designer and checker, and page number at the top of each page. Provide an index page with the design calculations. H. Design notes including an explanation of any symbols and computer programs used in the design. I. Pier to footing connections calculations WORKING DRAWINGS The working drawings shall include all information required for the construction and quality control of the footings/concrete piers. Working drawings shall include, but not be limited to, the following items unless provided in the contract plans: A. Plan view of concrete foundation structure(s) identifying a reference baseline and elevation datum. B. Plan view of foundations identifying the offset from the construction centerline or baseline to the face of the canopy/carport structure at all changes in horizontal alignment. VTA Project # Appendix C Page 6 of 11

7 C. Beginning and end of foundation structure stations in plan view. D. Right-of-way and permanent or temporary construction easement limits, location of all known active and abandoned existing utilities, adjacent structures or other potential interferences. The centerline of any drainage structure or drainage pipe behind, passing through, or passing under the foundation structure. Detailed surveys showing Rights-of-way or construction easements to be provided by VTA. E. Subsurface exploration locations shown on a plan view of the proposed foundation structure alignment with appropriate reference base lines to fix the locations of the explorations relative to the foundation structure. Geotechnical boring locations to be provided in CAD by VTA. F. An elevation view of the foundation structure(s) identifying/showing foundation locations and elevations; vertical and horizontal spacing; alignment and the location of drainage elements (if applicable). G. An elevation view showing the existing and finish grade profiles both behind and in front of the foundation structure (if applicable). H. Design parameters and applicable codes. I. General notes for constructing the foundation structure including construction sequencing or other special construction requirements. J. Horizontal and vertical curve data affecting the foundation structure and foundation structure control points. Match lines or other details to relate foundation structure stationing to centerline stationing. K. A listing of the summary of quantities on the elevation drawing of each foundation structure showing pay item estimated quantities. L. Foundation typical sections including foundation spacing; and connection details to the substructure footing, anchorage, plates, etc. M. Details, dimensions, and schedules for all foundations and reinforcing steel, including reinforcing bar bending details GENERAL NOTES: A. All steel products shall be from a North American source accompanied by mill certifications. B. Certified welding inspection reports shall be submitted for all welded structural components. VTA Project # Appendix C Page 7 of 11

8 C. All canopy bolts, nuts and washers, unless otherwise noted, shall have a hot dip galvanized finish. D All special inspectors (if applicable) shall be retained by the Contractor. The extent of the inspection shall comply with the contract document, applicable code requirements and the local jurisdiction. D. All materials shall be new, of good quality and without defects which would lessen quality of work. E. All materials shall conform to the requirements, tolerances, etc. of the latest editions of the AISC Manual of Steel Construction, AISI Specifications for the Design of Cold Formed Steel Members, ASTM Standard Specifications for General Requirements for rolled steel plates, shapes, sheets and bars for structural use. F. All welding shall be done in accordance with the latest version of the American Weld Society s Specification AWS D1.1. Electrodes shall be E70 series unless otherwise noted. G. Canopy erection drawings shall be furnished by Manufacturer at the time of material shipment. H. Templates for the placement of anchor bolts shall be provided by Manufacturer. PART 3 EXECUTION 3.01 SITE PREPARATION AND INSPECTION: A. Contractor shall direct, oversee and inspect all site work related to the solar canopy installation. Site preparation shall be in accordance with final drawings and specifications provided by manufacturer. B. Contractor shall inspect site and notify VTA in writing of any condition(s) that may inhibit the proper and timely construction of the canopies. Canopy Contractor shall be under no obligation to proceed until conditions have been sufficiently corrected INSTALLATION: A. Contractor shall be responsible for the installation of foundations and placement of anchor bolts. Contractor shall also be responsible for the removal and/or stockpiling of any spoils due to foundation drilling from the site daily. B. Installation of the entire system and all components shall be in strict accordance with Manufacturer s recommendations. VTA Project # Appendix C Page 8 of 11

9 C. System Installation shall conform to Manufacturer s Installation Manual, approved project drawings and specifications. D. All Local and NEC codes shall be observed. E. Interruption of electrical power to other circuits shall be minimized and shall be scheduled in advance at a time that will minimize impacts on the occupants (if the interruptions are significant, permitted times may be restricted to night time only). Installation crews shall minimize disturbance (due to noise, dust, odors, moving of equipment) of building occupants and activities. F. Sites shall be maintained and kept secure, free of excessive debris and in safe condition during the construction period. Site should be left "broom clean" after work is complete at the end of each work day. All work will comply with the National Electric Code, the National Fire Code, and the Uniform Building Code, and shall be inspected by the authorities having jurisdiction at appropriate phases. G. Array mounting hardware supplied by the Canopy Manufacturer shall be compatible with the site considerations and environment. Special attention shall be paid to minimizing the risk from exposed fasteners, sharp edges, and potential damage to the modules or support structures. Corrosion resistance and durability of the mechanical hardware shall be emphasized the use of galvanized steel fasteners and aluminum support structures are required. The use of ferrous metals, wood and plastic components are not acceptable. H. Contractor shall ensure installing subcontractors (if used) are familiar with Manufacturer's installation guidelines. Deliver canopy, PV modules and system components to their final locations in protective wrappings, containers, and other protection that will exclude dirt and moisture and prevent damage from construction operations. Contractor shall remove protection only after equipment is safe from such hazards. I. Contractor s representative shall be onsite for all equipment or material deliveries. Owner's representative will not accept, unload or store project materials delivered to the site, and will refuse such deliveries. J. Cranes or rigging equipment shall operate in compliance with all local codes and requirements at the Contractor s expense. K. System Installations in any Lighted Parking Areas shall be installed with lighting equipment installed or relocated to maintain existing lighting levels at all locations and surveillance visibility & quality. Contractor shall perform and submit for review, light level readings for existing parking areas prior to the start of any work in those parking areas and shall also submit a copy of a video showing visibility from surveillance cameras (if they exist). Contractor shall provide a lighting and surveillance design for approval by VTA Project # Appendix C Page 9 of 11

10 VTA prior to ordering or installation of same. All modifications are subject to review and approval by VTA CLEANING AND GROUTING: A. After the system has been fully erected, the Contractor shall provide the materials and labor to grout the base of the column to produce a finished joint. B. Contractor shall place all trash and debris into appropriate Contractorsupplied receptacles PROJECT COORDINATION A. The Contractor shall schedule all construction activities at the sites through the designated VTA Energy s representative to avoid, to maximum extent possible, interference with other companies and VTA Energy s operations and to meet specified completion dates. It is the responsibility of the Contractor to meet the Project Completion Date in coordination with VTA Energy s operating schedule. Contractor shall coordinate all construction activities through VTA Energy s representative, based in part on VTA Energy s calendar, to avoid interference with VTA Energy process and operations within site buildings. B. The Contractor shall coordinate, through VTA Energy s representatives, all interruptions of building services or shutdown of building systems and obtain, through VTA Energy s representatives, prior written approval of proposed schedule of interruptions or shut-downs. C. If, in VTA Energy s opinion, any such interruption or shut-down will affect the life safety of building occupants, Contractor shall schedule interruption or shut-down at a time acceptable to VTA Energy. D. Contractor shall insure all equipment, materials, fittings, and similar items required are available before interrupting or shutting-down existing systems. E. If the Contractor discovers Hazardous Materials during the inspection or construction of the System the Contractor shall notify VTA Energy and cease further work until permitted. F. Work shall be completed in accordance with a detailed Construction Schedule within the Project Completion Date established below. The Contractor shall submit a detailed construction schedule for completion of projects, beginning on the day that formal authorization to proceed is provided by VTA Energy, and ending on the day that the Solar PV Systems is deemed to be completed and in operation. The Mechanical VTA Project # Appendix C Page 10 of 11

11 Completion date for the Solar Photovoltaic System shall be no later than December 15, WARRANTY: A. Canopy manufacturer shall provide a twenty (20) year warranty on materials and a one (1) year warranty workmanship from the date of substantial completion. B. Canopy Manufacturer shall provide complete warranty information on all manufacturers providing accessories within the system. VTA Project # Appendix C Page 11 of 11