part 1 general 1.1 equals and alternates

2021-07-19 Section 01 11 00 PV Solar Addition Summary of Work Page 1
Part 1 General
1.1 EQUALS AND ALTERNATES
.1 Products specified herein and on the drawings are intended to establish a minimum requirement for the project materials. Specified products shall not be substituted except as allowed for in the instructions to bidders, and pre-approved during tender.
.2 BIDDERS SHALL APPLY TO THE HOUSING AUTHORITY, IN WRITING NOT LATER THAN 4:30 P.M. ON THE 6TH WORKING DAY PRIOR TO THE TENDER CLOSING DATE FOR ALTERNATE PRODUCT APPROVAL.
.3 Refer to Instructions to Bidders for additional procedures and requirements for submission for approval of alternates.
.4 Request for product alternate approval shall include all relevant product information and test data, including but not limited to those listed in the technical specification. It is the responsibility of the contractor submitting to demonstrate full compliance with the specification and or pre-approved products.
.5 Where alternate products are requested, the submission should include:
.1 Energy production models using approved software, and give daily, monthly, yearly and life-time production estimates and assumptions as noted in 1.4.4 below.
.2 Include a side-by-side comparison of PV Module parameters noted in Specification Section 263100 2.2 C, except where the specified product is to be provided.
.3 For alternate micro inverters, submit a schematic diagram showing any necessary changes to the balance of system (such as circuits, wire-size, conduit size, combiners, re-combiners, disconnects etc.) as well as product data for micro inverter, trunk cables, connectors, terminations, and typical installation manuals – from the manufacturer.
.4 Alternates for other products, such as racking, base-plates, weather-proof poke- through boxes or recombiners may also be submitted, with sufficient data to allow for comparison.
.5 All products must be CSA labelled and/or ULC listed for use in Canada, to the satisfaction of the Nova Scotia Electrical Authority, the Owner (Housing Authority) and their engineering consultant.
.6 Include a written warranty meeting the stated requirements for all products.
.7 All submissions must be comprehensive, in digital format and entirely legible. The Submitter is responsible to ensure all necessary information is supplied during the time-limited review period. Reference to information on websites or data bases is not acceptable. Partial submissions may be rejected.
1.2 SWTICHGEAR WORK
.1 Where specific work is noted on the drawings related to modifications to existing building switchgear, two local OEM suppliers are pre-approved: Schneider Electric
Power Products Division and Eaton Industries (Canada) Company. The modification work within the switchgear shall not be performed by an electrical contractor, and local CSA approval and certification is required and included in the work. Coordination of this work and any costs are included in the scope of work of this project.
1.3 RELATED REQUIREMENTS
.1 Instructions to Bidders
.2 For purposes of this specification, the word Owner, Project Manager and Facilities Manager are the same. Refer to Instructions to Bidders for additional definitions and requirements.
1.4 WORK COVERED BY CONTRACT DOCUMENTS
.1 Work of this Contract comprises a total “turnkey” project including all necessary equipment, materials, final design for review and approval (if alternate products are allowed), manufacturing and installation services for the installation of a utility- interactive solar photovoltaic generation system on the roof of the designated building.
.2 The contractor shall perform all professional services as necessary to provide the Owner with a complete information package including the requirements outlined in this Specification. The contractor shall supply and install the Work such that the completed system is operational and compliant with all applicable standards, building codes, Nova Scotia Power Inc. interconnection requirements. The Contractor shall include calculations, drawings and product literature for the complete system and submit it to the Project Manager for review and approval.
.3 This Specification and related drawings are intended to meet the criteria stated above. Alternate systems may be considered and evaluated based on yearly generating capacity (kWh), overall production (kWh/kW) and resilience for the 25-year project life; where such systems are submitted in conformance with the Instructions to Bidders. Sufficient conceptual design information, product literature and system production modelling must be submitted to allow for full evaluation.
.4 Request for alternate products, for modules and/or micro-inverters shall include a detailed calculation of photovoltaic electricity production. NREL System Advisor Model (SAM) (in detail mode), Aurora Solar Inc., Helioscope are acceptable software for generating reports for submission. Alternates software may be acceptable if submitted for approval and accepted. Clearly state all assumptions for weather, dirt depreciation and other internal production losses. Include as part of a comprehensive report, based on the building location, approximate orientation as given on the site plan and tilt angle equal to the roof slope; estimates for the entire array:
.1 Daily peak kW generation on December 21 and June 20.
.2 Monthly kWh generation for first year.
.3 Generation kWh, on a per year basis, for the first 25 years of operation
.4 Total cumulative generation for the 25 year lifespan
1.5 OWNER OCCUPANCY
.1 The building will remain occupied during entire construction period.
.2 Co-operate with Owner in scheduling operations to minimize conflict and to facilitate Owner usage.
.3 At all times, respect and minimize the impact on the building Tenants, and regard their safety as a primary function of this work.
1.6 WORK ON AND AROUND EXISTING BUILDING
.1 Execute work with least possible interference or disturbance to building operations, and normal use of premises. Arrange with the Project Manager to facilitate access to the site, parking, and for any necessary fencing or secure areas during construction or when lifting equipment on to the roof.
.2 Use only approved methods to access the roof of the building for moving workers and material.
.1 Protect the exterior walls as required during the work.
.2 Provide suitable ladders and lifting stages as required.
.3 Accept liability for damage, safety of equipment and overloading of existing parking, paved and grassed areas.
.3 Washroom facilities, lunchrooms and offices are not available on site. The Contractor shall arrange for temporary facilities – as required – and coordinate the locations on site with the Project Manager.
.4 The Contractor must save and protect the existing roof system from damage during construction, including during off-hours.
.5 Any deficiency found in the existing roof system must be reported to the Project Manager immediately and a request made for further instructions before proceeding. Schedule work such that any areas exposed during the work-day are completed, or restored to initial condition before the end of the day.
.6 It is recommended that the Contractor enlist the assistance of a reputable roofing contractor to assist in the Work on the roof. The Contractor warrants that any roof leaks during, or for a period of one year from the project Turnover Date, will be attended to by a roofing contractor familiar with the building and repairs completed without delay.
.7 The rows of modules must be arranged in neat and parallel rows, and as symmetrical as possible.
.8 Layouts which include a different number of rows, circuits or orientations must be submitted and approved by the Owner before shop drawings are submitted.
1.7 EXISTING SERVICES AND UNDERGROUND FACILITIES
.1 The new interconnection will be made at or near the existing electrical service entrance. Coordinate the shut down of equipment for connection with the Project Manager.
.2 Where underground work is anticipated, the Contractor shall identify the underground structure in the vicinity of the new service entrance using non-destructive detection and use hand-digging to excavate where the structure is closer than 1m from the existing finished grade.
2021-07-19 Section 01 11 00 PV Solar Addition Summary of Work Page 4 1.8 DOCUMENTS REQUIRED
.1 Maintain at job site, one copy each document as follows:
.1 Contract Drawings.
.4 Health and Safety Plan and Other Safety Related Documents.
.5 Other documents as specified.
Part 2 Products
2.1 NOT USED
.1 Not used.
Part 3 Execution
3.1 NOT USED
.1 Not used.
END OF SECTION
2021-07-19 Section 26 05 00 PV Solar Addition Page 1 of 5 Common Work Electrical
Part 1 GENERAL
1.1 Reference Standards
A. CSA Group
.1 CSA C22.1-2021, Canadian Electrical Code, Part 1 (24th Edition), Safety Standard for Electrical Installations.
.2 CAN3-C235 Preferred Voltage Levels for AC Systems, 0 to 50,000 V.
B. Province of Nova Scotia Electrical Bulletins in force at the time of tender.
1.2 Definitions
A. Electrical and electronic terms: unless otherwise specified or indicated, terms used in these specifications, and on drawings, are those defined by IEEE SP1122.
1.3 Informational Submittals
A. Submit in accordance with the Terms and Conditions of the Tender Documents.
B. Submit a Construction Waste Management Plan for review and approval by the Owner before construction commences.
C. Product Data:
.1 Submit manufacturer's instructions, printed product literature and data sheets for all electrical equipment.
.2 Where materials or equipment is different from that specified, submit samples for review and approval.
D. Submit for review a conduit layout for roof-mounted conduits and homeruns.
E. Shop drawings:
.1 Submit wiring diagrams and installation details of equipment indicating proposed location, layout and arrangement, control panels, accessories, solar equipment and other items that must be shown to ensure coordinated installation.
.2 Identify on wiring diagrams circuit terminals and indicate internal wiring for each item of equipment and interconnection between each item of equipment.
.3 Indicate of drawings clearances for operation, maintenance, and replacement of operating equipment devices.
1.4 Closeout Submittals
A. Submit in accordance with the Terms and Conditions of the Tender Documents.
B. Operation and Maintenance Data: submit operation and maintenance data for panelboards, relays, disconnect switches, inverter, ECU, and EMA.
C. As-built drawings indicating wiring, wire and cable sizes and equipment locations on the initial PV drawings.
1.5 Delivery, Storage and Handling
A. Deliver, store and handle materials in accordance with manufacturer's written instructions.
B. Delivery and Acceptance Requirements: deliver materials to site in original factory packaging, labelled with manufacturer's name and address.
C. Storage and Handling Requirements:
.1 Store materials in dry location and in accordance with manufacturer's recommendations in clean, dry, well-ventilated area.
.2 Store and protect modules, inverters and cables.
.3 Replace defective or damaged materials with new.
D. Follow the accepted Construction Waste Management Plan.
Part 2 Products
2.1 Design Requirements
A. Operating voltages: to CAN3-C235.
B. Control and distribution devices and equipment to operate satisfactorily at 60 Hz within normal operating limits established by above standard.
C. Breakers must be suitable for bi-directional operation. Devices that are identified with “load side” and “line side” are generally not acceptable unless specifically certified for use with solar AC systems.
2.2 Materials and Equipment
A. Material and equipment to be CSA certified.
B. All roof-top equipment must be CSA or ULC listed as suitable for the location and for use in solar PV installations.
C. Factory assembled control panels and component assemblies.
D. Equipment installed in existing panels or switchboards shall match the existing equipment specifications. Visit the site and confirm these requirements, indicate same on shop drawings.
E. New equipment, such as panelboards, disconnect switches, fused switches and contactors shall be commercial grade or better. Acceptable manufacturers are Schneider Canada, Cutler Hammer Eaton, and Siemens.
2021-07-19 Section 26 05 00 PV Solar Addition Page 3 of 5 Common Work Electrical 2.3 Warning Signs
A. Warning Signs: in accordance with requirements of CEC Section 64, Nova Scotia Power. Nova Scotia Electrical Bulletins, and as directed by the Owner.
2.4 Wiring Terminations
A. Ensure lugs, terminals, screws used for termination of wiring are suitable for either copper or aluminum conductors.
2.5 Equipment Identification
.1 General Equipment nameplates: lamacoid 3mm black face, white core, mechanically attached with self tapping screws.
.2 PV Solar Equipment warning signs, lamacoid 3mm red face, white core, mechanically attached with self tapping screws
.3 Sizes as required by CEC and as follows:
NAMEPLATE SIZES Size 1 10 x 50 mm 1 line 3 mm high letters Size 2 12 x 70 mm 1 line 5 mm high letters Size 3 12 x 70 mm 2 lines 3 mm high letters Size 4 20 x 90 mm 1 line 8 mm high letters Size 5 20 x 90 mm 2 lines 5 mm high letters Size 6 25 x 100 mm 1 line 12 mm high letters Size 7 25 x 100 mm 2 lines 6 mm high letters
B. Labels: embossed plastic labels with [6] mm high letters unless specified otherwise.
C. Wording on nameplates to be approved by the Project manager prior to manufacture.
D. Allow for minimum of twenty-five (25) letters per nameplate.
E. Nameplates for terminal cabinets and junction boxes to indicate system and/or voltage characteristics.
F. Disconnects, starters and contactors: indicate equipment being controlled and voltage.
G. Terminal cabinets and pull boxes: indicate system and voltage.
H. Transformers: indicate capacity, primary and secondary voltages.
2.6 Wiring Identification
A. Identify wiring with permanent indelible identifying markings, coloured plastic tapes numbered, on both ends of phase conductors of feeders and branch circuit wiring.
B. Maintain phase sequence and colour coding throughout.
C. Colour coding: to CSA C22.1.
D. Use colour coded wires in communication cables, matched throughout system.
2.7 Finishes
A. Metal enclosures shall be CSA Type 4X stainless steel 316.
B. Use 316 stainless steel clips, fasteners and bolts for attaching equipment.
C. Where specified, powder-coated aluminum is acceptable for specific enclosures.
Part 3 Execution
3.1 Examination
A. Verification of Conditions: verify that the site conditions are suitable for the work intended and report any hazard or unexpected condition to the Project Manage immediately.
3.2 Installation
A. Do complete installation in accordance with CSA C22.1 as a minimum, and as shown.
B. Do overhead and underground systems in accordance with CAN/CSA-C22.3 No.1 except where specified otherwise.
3.3 Nameplates and Labels
3.4 Conduit and Cable Installation
A. Install conduit in a neat and workman like manner, parallel and perpendicular to building lines.
B. Cables shall have suitable support on vertical and horizontal runs on the roof and in the attack (where approved).
C. Use Dura-Block roof-top supports or approved equal. Do not run conduit or cables directly on roof materials. Approved baseplates for the Racking system may be suitable for extending rails or other support equipment for roof-mounted cables.
D. The Contractor shall determine, in accordance with their final design and the CSA C22.1, the optimum number of conduits for homeruns to the ground-located panelboard.
2021-07-19 Section 26 05 00 PV Solar Addition Page 5 of 5 Common Work Electrical 3.5 Co-Ordination of Protective Devices
A. Ensure circuit protective devices such as overcurrent trips, relays and fuses are installed to required values and settings.
3.6 Field Quality Control
A. Load Balance:
.1 Measure phase current to panelboards with normal loads operating at time of acceptance; adjust branch circuit connections as required to obtain best balance of current between phases and record changes.
B. Conduct following tests in accordance with Section 26 31 00 and as normally expected for inspection authority approval.
.1 Power generation, distribution system including phasing, voltage, grounding and load balancing.
.2 Insulation resistance testing:
.1 Megger circuits, feeders and equipment up to 350 V with a 500 V instrument.
.2 Check resistance to ground before energizing.
C. Provide instruments, meters, equipment and personnel required to conduct tests during and at conclusion of project.
3.7 System Startup
A. Start-up complete system and operate for a minimum of one week after system energization, and before Final Commissioning.
B. At or before final turn-over, instruct operating personnel in the care and maintenance of systems, system equipment and components.
3.8 Cleaning
A. Leave Work area clean at end of each day.
B. Final Cleaning: upon completion remove surplus materials, rubbish, tools and equipment in accordance with the Construction Waste Management Plan and the Owners requirements.
C. Waste Management: separate waste materials for reuse and recycling as per the Construction Waste Management Plan.
D. Remove recycling containers and bins from site and dispose of materials at appropriate facility.
END OF SECTION
2021-07-19 Section 26 31 00 PV Solar Addition Page 1 of 9 System Specification
PART 1 GENERAL 1.1 General
A. The final delivery of the solar PV system will be the responsibility of the Solar
Contractor and the system must comply with this specification and related specifications and Instruction to Bidders. This specification outlines the overall system requirements, and certain minimum product or equipment requirements.
B. The Solar Contractor shall submit, within one week of award, a schedule of the
entire installation including milestone dates for 1. Procurement and Shop Drawings Submission Dates 2. Delivery of major components, racks, PV modules and microinverters 3. Installation of racks and inter-module wiring 4. Estimated rough-in inspection 5. Installation of modules and AC wiring 6. Testing and Commissioning 7. Anticipated In-Service date 8. Acceptance Test date 9. Anticipated Commercial Operation Date 10. Final wrap-up of site and Operation and Maintenance documents C. The Solar Contractor (also referred to as the Contractor) is the legal respondent to
the Tender. This includes the complete design (for alternate products), supply and installation of a complete roof-mounted PV Solar system, nominal nameplate as indicated on the drawings and includes the new service interconnection and arranging for a bi-directional meter.
1.2 Applicable Codes and Standards:
A. UL 61730 Part 1 and 2 Certification B. Test and Certification to IEC 61215-1 and 61215-2 for crystalline silicone C. IEEE 1547 “Standard for Interconnecting Distributed Resources with Electric Power
Systems” D. CSA C22.1 Canadian Electrical Code Part 1 2021 E. CSA C22.2 No.107.1-01 2016 “Power conversion equipment”
1.3 Other Requirements A. Province of Nova Scotia Nova Scotia Renewable Electricity Regulations made under
Section 5 of the Electricity Act. C. Nova Scotia Power Inc. (also referred to herein as NSP) Interconnection Guideline
Customer Generation Capacity Not Exceeding 100 kW, Version 2.0 or the most
current version at the time of this tender. E. The Owner or their agent will assist in making application for Bi-Directional
metering. However, it is within the Supplier’s Scope of Work to coordinate with NSP and ensure the Owner’s new equipment complies with the Utility regulations and is ready for the pre-determined connection date.
F. The Contractor will be responsible for Scheduling the Work in accordance with the
Owner’s requirements and in all cases advise the Facility Manager of any and all work to be carried out at the site – at least 1 week ahead of time. Any closures of access to the site, or blockage of any roadway must be coordinated with the Facility Manager at least one week ahead of time and is the responsibility of the Contractor.
G. The Contractor will submit a lifting plan for moving equipment to the roof-top. H. The Contractor is responsible to fall-arrest for its workers. Provide temporary – or
permanent – fall arrest stations as required by Nova Scotia Department of Labour. I. To provide the Solar Contractor with flexibility, this document provides a “Base
System” design, with pre-approved module and micro-inverters. Alternate products may be submitted for approval, during the period specified, following the procedures outlined in the Instruction to Bidders and Section 01 11 00.
J. In any case, specific model numbers and manufacturers names complete with
sufficient information sheets for each product, identifying the applicable Certifications, shall be submitted for completeness.
K. In accordance with the Terms and Conditions of the Tender Documents, prepare and
submit the following for approval:
1. Construction Waste Management Plan 2. Contractor Health and Safety Plan 3. Complete Site Hazard Assessment Plan 4. Lifting Plan
PART 2 PRODUCTS
2.1 General Requirements:
A. Refer to Section 01 11 00 Summary of Work for general requirements and conditions.
B. Submit shop drawings for all products for review by the Owner. Do not order equipment until the review is complete. Allow one week in the schedule for the Owner’s review of major components including micro-inverters, solar modules, combiners, racking system and interconnection equipment.
C. The system shall be complete, and turn-key, and shall include but is not limited
to the following:
1. All system components in accordance with the applicable Codes and consistent with the design intent expressed herein.
2. Submit documents, and obtain a permit, from Nova Scotia Power for the
complete installation. Submit a copy of the permit to the Project Manager, as well as posting on site as required.
3. Solar PV modules, micro-inverters, proprietary AC interconnection
cables, junction boxes, wiring, vermin protection for cables, AC Aggregators, AC combiners, re-combiners, panels and AC wiring and cables, rack and rack support baseplates.
4. An integrated power, electrical metering, monitoring and communication
system and current software, both supplied by the microinverter manufacturer. Web-based application to allow for the real-time measuring, monitoring and reporting of the system status and generated power, including GMS cell/mobile transmission capability and web- based access to status and generated power at the module level. Provide 120V circuit from base building panel and equipment enclosure or rack. Locate device to ensure reliable communication to every micro-inverter. Provide antenna, or remote signal boosting equipment as required.
5. Service Entrance interconnection equipment as indicated. 6. All other AC junction boxes, wiring and installation as required for a
complete and operating system, in complete conformance with CSA C22.2 Part 1 Section 64.
7. Provide all warning labels, consistent with the examples provided on the
drawings, and as required or directed by Nova Scotia Power. 8. Test and Commissioning of the complete system. Provide as-builts and
maintenance manuals as described herein. The final Acceptance Testing shall be performed a minimum of one week after the system is connected and operational – to ensure any power electronics or cables which fail early are detected and repaired before final Acceptance Test and turnover.
9. Include all costs to arrange, test and demonstrate system for Nova Scotia
Power ahead of In-Service date
D. The system must include all the hardware needed for the solar PV. This includes conduits, cable tray, clips, rodent protection and other wireways as required.
E. All systems must be installed in accordance with all applicable requirements of local electrical codes including 2021 CSA C22.1 Section 64. Systems must be designed and installed using CSA, cUL or ULC listed components, including mounting systems, wiring and connectors.
F. All Balance of Systems (wiring, component, wiring, conduits, and connections) must
be suited for conditions for which they are to be installed.
G. System shall be supplied with lockable AC disconnect switches.
H. The AC panel connected to the PV system, as well as the main switchboard and the existing metering location shall be clearly labeled with CSA compliant weather-proof labels indicating the possible danger from alternate power sources, and “Photovoltaic Sources” as noted and required.
I. Provide weather-proof through-boxes as indicated to provide water-tight entry to attics or through soffits as indicated and where required. Devices to be as manufactured by Soladeck for AC circuits and include DIN rail and appropriate number of AC terminals for circuits which pass through.
J. Include one spare micro-inverter, and turn over to the Owner after final testing and commissioning. Replace this unit, and any other unit, should they fail in the first year of operation.
2.2 PV Modules:
A. System must comply with IEEE 1262 “Recommended Practice for Qualifications of
Photovoltaic Modules”.
B. Modules must be certified to UL 61730 “Photovoltaic Modules and Panels”.
C. Replace any module, immediately, if it fails in the first year. Provide written warranty and method for labour and warranty for the remaining 24 years.
D. The modules shall be as manufactured by LG Electronics Inc. model LG NeON2, lg340N1C-A5, or approved equal, with the following features: 1. 60 Cells, N-type monocrystalline 2. 12 multi-wire busbar 3. Front load 6kPa, rear load 5.4kPa 4. MC4 connectors 5. Junction box IP68 with 3 bypass diodes 6. 1m DC cables 7. High transmission tempered glass front 8. Anodized aluminum frame 9. Power at STC (1000W/m2, 25°C) 330W maximum
10. Rated Efficiency 19.3% 11. Power at NOCT (800 W/m2, 20°C, wind 1m/s) 243W 12. Operating conditions 45°C +/- 3°C 13. Pmax temperature coefficient -0.37 14. Certified: IEC 61215,61730-1, 61730-2, UL 1703 15. Certified: IEC 61701 salt mist Corrosion Test 16. Type 1 UL 1703 fire rating 17. Warranty for material and labour 25 years 18. Warranty for Pmax Output: after 1st year 98%, 0.5% or less annual
degradation, 85% after 25 years 2.3 Inverters:
A. Inverters must comply with the following requirements:
1. IEEE 929-2000 – “Recommended Practice for Utility Interface of
Photovoltaic Systems”
2. UL 1741 – “Standard for Static Inverters and Charge Controllers for use in Photovoltaic Systems”, including advanced inverter 1741 SA Appendix.
3. Grid compliance with IEEE 1547.
4. Where settings are required to be provided by Nova Scotia Power, the Solar Contractor shall adjust the settings, hardware or software, to allow the system to be in complete conformance with the requirements of the Standard Generator Interconnection and Operating Agreement.
B. Inverters shall be microinverters with DC modules input connectors, and rated to
deliver 290W 290VA of power on a continuous basis, at 208V or 240V single phase, as shown on the drawings.
C. Microinverters shall carry an Extended 25 year Limited Warranty from the manufacturer. Any device which fails in the first year shall be replaced by the Contractor using one of the spares, and the spare replaced.
D. Microinverters shall be Enphase IQ7 Plus, or approved equal, and shall be supplied with all necessary bus cables plug-ins, connectors and terminations for a complete system.
E. Were indicated, provide circuit Aggregators to act as combiners: Enphase Q-BA-3- 1P-60 (for 240V) or Q-BA-3-3P-35 (for 208V). Where device has an unused terminal, provide a permanent seal using manufacturers plug and silicone sealer Permatex RTV or approved equal. Also, place a lamacoid indicating no additional loads may be added. These devices do not have serviceable parts but are required to be accessible and located under the arrays.
F. System shall be complete with Energy Communication Unit (ECU) for measuring power produced and real-time status and information from each micro inverter. The unit will automatically communicate with every microinverter using a mesh network (ZigBee). The system shall include a cellphone based GSM modem to communicate with and allow access to the internet.
G. Include Energy Monitoring Software (EMA) for web-based connection to the ECU, and all necessary software.
H. Inverters shall be Non-Islanding type designed to shut down on loss of utility power.
I. Inverters shall be installed in all-weather enclosures (CSA Type 4 or 3R) suitable for exterior location.
J. Inverters shall be located in an easily accessible, weather-protected area, and not be subject to direct rain or sun, preferably under modules.
2.4 Roof-mount Rack System
A. The rack system for the PV modules shall be custom designed for the project.
The complete array shall be arranged to be perpendicular and parallel to the roof lines as indicated, and face south as much as possible. The system shall be “flush-mounted” parallel to the roof plane.
B. Design shall carefully consider the concentrated loads imposed on truss top chords. The rack support baseplates spacing will need to be as close as practical. Large baseplate fasteners can weaken the top chord, so the maximum fastener size is 5/16" diameter (8 mm). Acceptable support baseplates (brackets) are RT- Mini from Roof Tech or approved equal.
C. Every fastener shall be pre-drilled. Drill holes only at the center of any joist or rafter. Confirm and mark (with chalk) each rafter before drilling.
D. The drawings show a proposed layout for the array. Landscape orientation is to be used (60 or 72 cell panels) and support baseplates should be spaced at no more than 4' horizontally. Each rail should have the support baseplates attached to alternating trusses except at the ends or where spacing is 2' (staggered rows of feet).
E. Refer to CSA SPE-900 for additional guidelines for installation and National Building Code of Canada climate and environmental data for the nearest city or township to the site. Other factors are to be determined by the design engineer. The design engineer shall be a professional engineer licensed to practice in Nova Scotia.
F. Submit shop drawings of complete racking system, showing all wind load and
connection calculations. Identify all rails and support baseplate locations on the shop drawing, as well as mounting details and bolt-tightening torques. Shop drawings shall bear the seal of a structural engineer licensed in Nova Scotia.
G. All rack components shall be aluminum or stainless steel. The preferred system includes a minimum of two continuous rails per row of modules, run the long- wise direction of the landscape modules. Spacing as per the modules manufacturer’s written instructions.
H. Include module grounding clamps for every module. Clamps shall incorporate pointed projections which penetrate any anodized coating on aluminum.
I. Grounding clamps for each rack shall be provided as an integral part of the rack system.
J. All structures, including array structures, shall be designed to resist dead load, live load, plus wind and seismic loads to the geographic area.
K. Thermal loads caused by fluctuations of component and ambient temperatures must be combined with all the above load combinations.
2.5 AC Combiner Panels
A. AC combiner panels shall be suitably rated and be approved for use with AC
circuits from solar PV systems. B. Panels shall be complete with a full sized neutral, and space for all breakers
indicated. C. Ensure that bonding conductor is extended and terminated on appropriate lug in
panel. D. Panels shall have a hinged cover and be CSA Encl. 3 or better where located
outside. E. Provide a main breaker where shown.
PART 3 EXECUTION
3.1 Installation:
A. Prior to installation, all design drawings and specifications shall be submitted and reviewed by the Project Manager.
B. Installer shall coordinate work with the building manager to minimize effect on
building construction or operations.
C. Installer is responsible for removing all unused material and restoring the location to
acceptable condition after every workday. 3.2 Testing and Commissioning
A. A performance test shall be used to verify system operation. Supplier shall submit
an Acceptance Test procedure for approval at least two weeks prior to the scheduled Acceptance Test date.
B. The Contractor shall arrange for and coordinate all necessary testing and inspections required by Nova Scotia Power in order to facilitate the solar PV project and bi- directional metering. This will be required ahead of final Acceptance Testing and Commissioning.
C. Every module and every micro-inverter shall be 100% operational before the Contractor requests that the acceptance test be witnessed by the Project Manager. The ECM and EMA must be fully functional to ensure complete operation.
D. Acceptance testing shall be done near mid-day in sunny conditions. If any module or
inverter is non-functional (non-reporting) or if any module or inverter is generating 10% less than the average of the two nearest neighbors, the test will not proceed until such conditions are corrected. A screen shot of the EMA software demonstrating the correct operation is required.
E. Acceptance testing shall verify that every component is functioning correctly, and
the system will produce at least 90% of the expected output for solar conditions at the time of the test.
F. At or before the final Acceptance the Contractor shall submit a written statement of conformance that they have torqued every bolt in the rack system, and every ground lug to meet the manufacturer’s instructions.
3.3 Operation and Maintenance
A. The Solar Contractor will provide a complete manual for Operation and Maintenance for review and approval.
B. Include all necessary software upgrades at no cost (for metering and monitoring) for a period of five years from final Acceptance Test.
C. Assist the Owner in obtaining the appropriate SIM card from a local provider – for use with the ECU.
D. Test sheets, showing every module and inverter, by way of bar code serial number stickers arranged to reflect the physical location in the array is required. Suggested array and row numbers are indicated on the drawings. The contractor may adjust the
numbering, but each module and inverter shall be identifiable using the fixed weather-proof labels provided on row disconnect switches, ac-combiners and array letters.
E. As-built drawings shall be kept and submitted for final review and incorporation into Record Drawings by the Project Manager.
F. The Work shall not be deemed to be substantially complete until the As-built drawings and Maintenance Manuals, and spare micro-inverter are received in acceptable form by the Project Manager.
END OF SECTION
COBEQUID HOUSING AUTHORITY BID AND AGREEMENT MINOR CONSTRUCTION - UNIT PRICE DESCRIPTION OF WORK: COB2021-10 – Solar Photovoltaic Addition and Attic Structural Upgrades at 2 Senior Complexes located in Springhill NS. BID CLOSING: DATE: October 7, 2021
TIME: 2:00PM
144 Victoria St., East
Amherst, NS B4H 1Y1 ACKNOWLEDGEMENT OF ADDENDA: ADDENDUM # DATED: ADDENDUM # DATED: 1 OFFER
The undersigned Bidder (hereinafter called the "Contractor") hereby offers to the Housing Authority (hereinafter called the "Authority") to furnish all necessary tools, plant, services, materials, and labour to execute and complete the work set out in the "Description of Work" for the Total Estimated Bid Price set out in Clause 3 of this Bid and Agreement.
2 GENERAL AGREEMENT
The Contractor agrees:
.1 to complete the work within 90 days from the date of acceptance of this Bid, .2 to provide security with this Bid as specified under Clause 8.1 in the Instructions to Bidders and if
this Bid is accepted, such security will be forfeited if the Contractor refuses the Contract. .3 that this Bid and Agreement, the Instructions to Bidders, the Plans and Specifications and the
General Conditions included herewith shall be and are the complete Bid and this offer is made subject to the provisions contained therein.
.4 that this Bid supercedes and/or cancels all communications, negotiations, and agreements relating
to the work other than contained in the complete Bid.
BID AND AGREEMENT - CONSTRUCTION UNIT PRICE PAGE 1 OF 4
2 GENERAL AGREEMENT (cont’d)
.5 that this Bid may not be withdrawn for a period of 30 days following Bid Closing. .6 that the acceptance letter shall be issued by:
.1 forwarding by Registered Mail a letter to the Contractor at the address set out in the Bid document, in which case acceptance shall be deemed to be on the day this letter is deposited in the mail, or;
.2 delivering a letter by hand to the Contractor at either: the address set out in the Bid document, the Head Office of the Contractor, or to any officer of the Contractor, in which case acceptance shall be deemed to be the day the letter is delivered.
.7 to provide security upon award of the contract as specified under Clause 8.2 in the Instructions to
Bidders and such security will be a Performance Bond, and a Labour and Material Payment Bond each in the amount of 50 percent (50%) of the Contract value or negotiable security in the amount of 10 percent (10%).
.8 that the complete Bid together with and subject to all the provisions contained therein shall, when
accepted and executed on behalf of the Authority, constitute a binding Contract between the Contractor and the Authority.
.9 that this Bid is made without connections with any other person or persons submitting Bids to
perform the work described herein. 3 TOTAL ESTIMATED BID PRICE
The Contractor agrees that the following is the Total Estimated Bid Price referred to in Clause 1 of Page 1 and excludes all Federal, Provincial, and Municipal Taxes and fees and is based on the detailed unit price(s) set out in Schedule "A" attached to and forming part of this Agreement.
Total Estimated Bid Price Excluding All Taxes $ ______________________ HST $ ______________________ 4 THE AUTHORITY UNDERTAKES AND AGREES:
.1 to make payments on account as follows: .1 Within a reasonable time of receipt by the Authority of a bona fide claim for payment, ninety
percent (90%) of the value, proportional to the amount of the Contract, of labour and materials incorporated in the work or materials on the site to be incorporated in the work, as estimated by the Contractor and approved by the Project Manager less the aggregate of previous payments.
.2 Ten percent (10%) of the value of the work, service and materials shall be retained by the
Authority for a period of 65 days after the Authority is of the opinion that the Contract is substantially performed as defined in the General Conditions.
4 THE AUTHORITY UNDERTAKES AND AGREES: (cont’d)
.3 Sixty (65) days after the Contract is substantially performed, the Authority may reduce the amount retained to two and one-half (22) percent of the value of the work, services and materials, or the Authority may retain the full 10 percent (10%) until all required work is performed completely, as determined by the Authority.
.4 Notwithstanding the foregoing the Authority shall be entitled to retain a warranty (1 percent of the
contract price) for a period of one year after the work is substantially complete.
.5 Notwithstanding the foregoing, the Authority is entitled to make other deductions as provided in the General Conditions of the Contract.
FAILURE TO PROPERLY SIGN THIS DOCUMENT WILL RESULT IN THIS BID BEING REJECTED.
CONTRACTOR CONTRACTOR'S FULL BUSINESS NAME FULL BUSINESS ADDRESS Print or Type
Business Phone Fax Number Submitted on behalf of the Contractor this day of , 2021. WITNESS SIGNATURE TITLE OF SIGNING OFFICER AUTHORIZED SIGNATURE WITNESS SIGNATURE TITLE OF SIGNING OFFICER AUTHORIZED SIGNATURE ACCEPTANCE Accepted on behalf of the Cobequid Housing Authority this day of , 2021.
WITNESS SIGNATURE TITLE OF SIGNING OFFICER AUTHORIZED SIGNATURE
Revised March 21, 2005
MINOR CONSTRUCTION - UNIT PRICE
COB2021-10 – Solar Photovoltaic Addition and Attic Structural Upgrades at 2 Senior Complexes located in Springhill NS.
Item #
Description
1.
Solar Photovoltaic Addition and Attic Structural Upgrades at Hillcrest Villa, 20 Junction Road, Springhill, NS
Total Cost as per Scope of Work
1
2.
Solar Photovoltaic Addition and Attic Structural Upgrades at Four Winds, 16 Herrett Road, Springhill, NS
Total Cost as per Scope of Work
1
$
COB2021-10 – Solar Photovoltaic Addition and Attic Structural Upgrades
at 2 Senior Complexes located in Springhill NS.
Please see attached drawings and specifications for scope of work for the following locations:
Hillcrest Villa, 20 Junction Road, Springhill, NS. Four Winds, 16 Herrett Road, Springhill, NS
GENERAL CONDITIONS MINOR CONSTRUCTION 1 DEFINITION OF TERMS
.1 The Project Manager means such person as may be specifically designated by or on behalf of the Authority upon the award of this contract and includes a person specifically authorized by the Project Manager to act on his/her behalf.
.2 Instructions shall be deemed to have been given to the Contractor if delivered in writing to the
individual or to a member of the firm or to an officer of the Corporation for whom it is intended, or if delivered at or sent by mail to the last business address known to the Authority.
.3 The term "Work" includes the whole of the works, materials, matters and things to be done,
furnished and performed by the Contractor under the contract. 2 ASSIGNMENT AND SUBCONTRACTING
The Contractor shall not assign the contract or any monies due or accruing under the contract under any circumstances without the written consent of the Authority. Every subcontract shall incorporate all the terms and conditions of the contract which can reasonably be applied.
3 INDEMNIFICATION
The Contractor shall indemnify and save harmless the Authority from and against all claims, losses, costs, damages, suits, proceedings, or actions arising out of or related to the Contractor's activities in executing the work, including omissions or improper acts in executing the work. The Contractor shall pay for and maintain liability insurance in an amount of not less than two million dollars in respect to any one accident or occurrence against claims for personal injury, death, or property damage or loss arising from any act, fault or omission of the Contractor. Certificates of insurance, showing the Authority as a named insured, shall be filed with the Authority before work commences.
4 WORKERS COMPENSATION
The Contractor shall carry Workers Compensation coverage on all employees engaged under this Contract. The Contractor shall supply the Authority with a Letter of Good Standing from the Workers Compensation Board and their Revenue Canada Business Number prior to commencing work.
5 GUARANTEE WARRANTY
The Contractor shall, in addition to any specific warranty or guarantee called for in the Contract, warrant and guarantee, for a period of one year from the date of completion, all work performed and called for on the drawings and the specifications including any additional work approved and accepted as an extra to the contract. The Contractor shall, at his/her own expense, rectify any defects that arise, as a result of poor or improper workmanship, or defective materials, fixtures or apparatus during this one-year period. The Authority may retain an amount equal to 1% of the contract price for the one year period as a performance guarantee. Neither the final certificate nor payment thereunder, nor any provisions in the contract shall relieve the Contractor from the responsibility for replacing faulty materials or correcting workmanship which shall appear during this one-year period.
CONSTRUCTION UNIT PRICE G.C.-1
5 GUARANTEE WARRANTY (cont’d)
In the event that the Contractor places in use certain apparatus, machinery or equipment, prior to the completion date, it shall remain the Contractor's responsibility to maintain the guarantee period regardless of the possibility that the manufacturers' guarantee may have expired previously.
Notwithstanding the provisions of this clause, completion of the project shall be the latter of either the date of project handover, or the date of the certificate of substantial completion.
6 PERMITS, LICENSES, FEES, TAXES AND BY-LAWS
The Contractor shall comply with all Federal, Provincial or Municipal laws and regulations, relating to the work and shall pay for all permits, licenses, fees and certificates required for the execution of the work.
The Contractor shall include in the Bid all Federal, Provincial and Municipal taxes which are applicable to this Contract and the Contractor shall pay these taxes. No return of, or credit for taxes paid will be made to the Contractor.
7 SAFETY MEASURES
The Contractor shall take precautions to prevent accidents and injury to persons or property, about and adjacent to the premises where the work is performed.
The Contractor will be held responsible for the enforcement of all applicable provisions of the Nova Scotia Occupational Health and Safety Act and it's Regulations and all other safety measures as required by authorities having jurisdiction.
Vehicular and pedestrian traffic shall be protected by the use of barriers supplied by the Contractor.
8 PROJECT MANAGER AND CONTRACTOR
The Project Manager shall have general supervision and direction of the work, but the Contractor shall have complete control of his/her organization subject to Clause 9.
9 THE PROJECT MANAGER'S DECISIONS
The Project Manager shall decide on questions arising from the contract documents, concerning the performance of the work or the interpretation of the specifications and drawings. Should the contractor find said decisions to be at variance with the contract documents, or involve changes in work already in place, in excess of the contract or to be given in error, he/she shall notify the Project Manager in writing before proceeding to carry it out.
10 FOREPERSON SUPERVISION
The Contractor shall keep on the site, during its progress of the work a competent foreperson and any necessary assistants, satisfactory to the Project Manager. The foreperson shall not be changed except with the consent of the Project Manager, unless the foreperson proves to be unsatisfactory to the Contractor and ceases to be in his/her employ. The foreperson shall represent the Contractor in his/her absence and directions on minor matters given to him/her shall be held to be given to the Contractor. Important directions shall be given in writing to the Contractor. The Contractor shall give efficient supervision to the work, using his/her best skill and attention.
11 MATERIALS, APPLIANCES, EMPLOYEES
Unless otherwise stipulated, the Contractor shall provide and pay for all materials, labour, water, tools, equipment, light and power necessary for the execution of the work.
Unless otherwise specified, all materials shall be new. Both workmanship and materials shall be of the quality specified.
The Contractor shall not employ on the work any unfit person or anyone not skilled in the work assigned him/her.
12 INSPECTION OF WORK
The Authority, the Project Manager, and their agents or representatives shall at all times have access to the work site and the Contractor shall provide proper facilities for such access and for inspection.
If the specifications, the Project Manager's instructions, laws, ordinances or any public authority require any work to be specially tested or approved, the Contractor shall give the Project Manager timely notice of its readiness for inspection, and if the inspection is by an authority other than the Project Manager, of the date and time fixed for such inspection. Inspections by the Project Manager shall be promptly made. If any such work should be covered up without the approval or consent of the Project Manager, it shall, if required by the Project Manager, be uncovered for examination, and made good at the Contractor's expense.
Re-examination of questioned work may be ordered by the Project Manager. If the work is found to be in accordance with the contract, the Authority shall pay the cost of re-examination and replacement. If the work is found not to be in accordance with the contract, through the fault of the Contractor, the Contractor shall pay such costs.
13 DEDUCTIONS FOR UNCORRECTED WORK
If in the opinion of the Project Manager, it is not expedient to correct defective work or work not done in accordance with the contract documents, the Authority may deduct from the contract price the difference in value between the work as done and that called for by the contract, the amount of which shall be determined by the Project Manager.
14 PROTECTION OF WORK AND PROPERTY
The Contractor shall maintain continuous adequate protection of all his/her work from damage and shall protect the Authority's property from all injury arising in connection with this contract. He/she shall make good any such damage or injury, except such as may be directly due to errors in the contract documents. He/she shall protect adequately adjacent property as required by law and the contract documents.
CONSTRUCTION UNIT PRICE
15 EMERGENCIES
The Project Manager has authority to stop the progress of the work whenever in his/her opinion such stoppage may be necessary to ensure its proper execution. In an emergency affecting or threatening the safety of life, or of the structure, or of adjoining property, he/she has authority to make such changes and to order such work extra to the contract or otherwise as may in his/her opinion be necessary.
16. CONTRACT SECURITY
Contractor shall provide contract security. This may be in the form of a Performance Bond and a Labour and Material Bond each in the amount of 50% of the contract. Alternate acceptable security includes a minimum of 10% of the Contract amount in the form of a Certified Cheque, Government of Canada Bearer Bonds, Irrevocable Letter of Credit drawn on a Canadian Chartered Bank, Credit Union or Trust Company, or Term Deposit Certificate which has been fully paid for, assigned to the Authority and deposited with the Housing Authority in Trust.
If the work is taken out of the Contractor's hands, or if the contract is terminated pursuant to the General Conditions, or if the Contractor is in breach or in default under the contract, the Authority may negotiate the security deposit, in the case of bonds, or Term Deposit Certificate, or convert the security deposit to its own use, in the case of negotiable security and the amount realized by the Authority shall be deemed to be a debt payable by the Authority to the Contractor and the Authority shall have the right of set-off against the debt any sum or amount which the Contractor may be liable to pay to the Authority and the balance of the debt, if any, after the right of set-off has been exercised, and if such balance, in the opinion of the Project Manager, is not required for the purposes of the contract shall be paid by the Authority to the Contractor.
If the Contractor is not in breach of, or default under, the Contract at the time the Project Manager's Interim Certificate of Completion is issued, the Authority will return the security deposit to the Contractor. Notwithstanding the above and upon the recommendation of the Project Manager, the Authority may release the security deposit to the Contractor prior to 100 percent completion but in no event at less than 90 percent completion.
17 CHANGES IN WORK
The Authority or the Project Manager, without invalidating the contract may make changes by altering, adding to, or deducting from the work and the contract sum shall be adjusted accordingly. Such work shall be executed under the conditions of the original contract except any claim for extension or reduction of time caused thereby shall be adjusted at the time of ordering such change.
Except as provided in Clause 15, no change shall be made unless pursuant to a written order from the Project Manager, and no claim for an addition to or a deduction from the contract sum shall be valid unless it is in writing.
18 HOUSING AUTHORITY'S RIGHT TO DO WORK
If the Contractor neglects to perform the work properly or fails to perform any provisions of this contract, the Authority after three days' written notice to the Contractor, may without prejudice to any other remedy it may have, make good such deficiencies and may deduct the cost thereof from any payment due the Contractor.
19 OWNER'S RIGHT TO TERMINATE CONTRACT
If the Contractor should be adjudged a bankrupt, or if he/she should make a general assignment for the benefit of his/her creditors, or if a receiver should be appointed on account of his/her insolvency or if he/she should refuse or fail to supply enough properly skilled workmen or proper materials after having received seven days' notice in writing from the Project Manager to supply additional workers or materials, or if he/she should fail to make prompt payment to subcontractors for material or labour, or persistently disregard laws, ordinances or the instructions of the Project Manager, or otherwise be guilty of a substantial violation of the provisions of the contract, then the Authority may, without prejudice to any other right or remedy, by giving the Contractor written notice, terminate the employment of the Contractor and take possession of the premises and of all materials, tools and appliances thereof and finish the work by whatever method may be deemed expedient, but without undue delay or expense. In such case the Contractor shall not be entitled to receive any further payment until the work is finished. If the unpaid balance of the contract price exceeds the expense of finishing the work such excess shall be paid to the Contractor. If such expense exceeds such unpaid balance the Contractor shall pay the difference to the Authority.
20 SEPARATE CONTRACTS
The Authority reserves the right to enter into other contracts in connection with the undertaking of which the work is a part and the Contractor shall connect properly and co-ordinate his/her work with that of other contractors. If any part of the Contractor's work depends for its proper execution or result upon the work of another contractor, the Contractor shall report promptly to the Project Manager any defects in the work of such other contractor as may interfere with the proper execution of the Contractor's work. Should the Contractor fail so to inspect and report he/she shall have no claim against the Authority except as to latent defects not reasonably noticeable at the time of the commencement of the Contractor's work.
21 CLAIMS AGAINST CONTRACTOR
The Contractor shall promptly pay for all labour, services and materials, in connection with his/her work. All such payments shall be made by the Contractor at least as often as payments are made by the Authority to the Contractor, and, in the event of failure by the Contractor at any time to do so, the Authority may retain from any monies due, or to become due to the Contractor, such an amount of money as the Project Manager may deem sufficient to make such payments. If the Project Manager believes that any such payments will not be promptly made by the Contractor, the Authority may pay for any such labour, services and materials, from any date to any date, and to any amount which may be payable, and the amount or amounts so paid shall be deducted from any monies that may be due or that thereafter may become due to the contractor.
Before final settlement is made for the work done and the materials furnished under the contract, the Contractor shall produce and furnish evidence satisfactory to the Authority that the said work and all its parts are free and clear from all lawful claims or liens under any law, for labour, workmanship, material or otherwise, and that no claim then exists, in respect to which a claim or lien upon the said work could, or might attach. The Contractor shall indemnify and save harmless the Authority from all liens arising from the labour and services performed, the materials furnished, and otherwise, in relation to the said work.
G.C.-5
22 LIENS The Housing Authority and the Contractor are both bound by the Builders Lien Act. 23 PAYMENTS
Payments equal to percentage stipulated in the agreement of the value of the work done, as valued by the Project Manager, will be made to the Contractor monthly, as the work progresses, on the written Certificate of the Project Manager that the work, for or on account of which the certificate is granted, has been duly executed to his/her satisfaction, and stating the value of such work as computed by him/her, and insurance policies for the project are in force; the said certificate shall be a condition precedent to the right of the Contractor to be paid the said percentage, or any part thereof. No such monthly payment shall be construed to be an acceptance of any defective work or improper materials.
Whenever the work is completed according to the Builders Lien Act and to the plans and specifications and to the satisfaction of the Project Manager, the Authority shall issue the final certificate. The Authority will then pay to the Contractor within 65 days of execution of the final certificate the balance of funds due, excepting such sums as may be lawfully deducted or retained under any of the provisions of the Contract. The written Certificate of the Project Manager certifying to the final completion of the said work to his/her entire satisfaction shall be a condition precedent to the right of the Contractor to receive or to be paid the balance due, or any part thereof. The right is reserved by the Authority to reject the whole or any part of the work, should the said certificate be found to be inconsistent with the terms of the Contract, or otherwise improperly given.
The Project Manager's progress certificates, and the payment of progress estimates based upon the same, shall not be construed as acceptance or approval of the work but only as temporary advances to the Contractor; and he/she shall be bound, notwithstanding such progress estimates, to well and truly complete, finish and hand over in good condition, and to the entire satisfaction of the Project Manager, by the time specified and in accordance with the terms and conditions of the specification, the whole of the work included therein; and all the percentage retained by the Authority shall be retained until the said full and satisfactory completion has been formally certified by the Project Manager.
Revised March 7, 2006
COBEQUID HOUSING AUTHORITY INSTRUCTIONS TO BIDDERS MINOR CONSTRUCTION - UNIT PRICE 1 BID CLOSING
Bids addressed and delivered to the Authority, will be received at the Bid Closing Address up to the Bid Closing Date and Time as shown on Page 1 of the Bid and Agreement.
2 BID FORM
One copy of the Bid shall be submitted on the Bid and Agreement Form provided by the Authority. All spaces on the form must be filled in completely and correctly. Signatures are to be those of authorized signing officers and are to be witnessed.
The Bid submitted shall not contain any form of qualification unless the Bid documents otherwise provide, for any unsolicited alternative to the Bid.
The completed form shall be without interlineation, alterations, or erasures.
3 RIGHT TO REJECT
The right to reject any or all Bids or to accept any Bid deemed most satisfactory is reserved by the Authority. The Authority reserves the right to waive any informality in any or all Bids.
4 RECEIPT OF BIDS
.1 A Bid submitted by facsimile will not be accepted.
.2 Bids delivered to the Bid Closing Address must be in a sealed envelope marked "Bid" and bear the name of the bidder and the project "Description of Works".
5 MODIFICATIONS TO BIDS
Modifications received by telephone shall not be considered.
Modifications may be made to Bids by telegram or facsimile (fax) message, provided the modifications are received by the Authority prior to Bid Closing Time and subject to the conditions regarding receipt of facsimile transmissions contained in Clause 4.1 in these instructions. Cobequid Housing Authority facsimile # 902-667-1686.
Modifications should not include the total original or revised bid amount.
INSTRUCTIONS TO BIDDERS - CONSTRUCTION UNIT PRICE PAGE 1 OF 2
6 EXISTING CONDITIONS
Bidders will be held to have examined the drawings, to have visited the site, and to have informed themselves of any and all existing conditions and limitations. Bids shall cover the execution of the whole of the work described in the specifications, as shown on the drawings, or both.
7 CONSTRUCTION SAFETY
Prior to contract award, the successful bidder must provide a Certificate of Recognition issued jointly by the Workers’ Compensation Board of Nova Scotia and an occupational health and safety organization approved by the Workers’ Compensation Board of Nova Scotia.
8 SECURITY REQUIREMENTS .1 With Bid
Bids must be accompanied by bid security in the form of a Bid Bond, a Certified Cheque payable to the Authority, Government of Canada Bearer Bond(s), or an Irrevocable Letter of Credit drawn on a Canadian Chartered Bank, Credit Union or Trust Company. The amount of the security must be not less than 10 percent (10%) of this Bid. .1 Bid security to be in Canadian funds .2 Security in the form of cash will not be accepted
.2 Upon Acceptance of Bid If a Bid Bond was used, the successful bidder shall immediately upon award replace the Bid Bond with a Performance Bond and a Labour and Material Bond, each in the amount of 50 percent of the amount payable under the Contract or such other security as noted in Clause 8.1 in these instructions. Where other security has been submitted, the Authority will retain the deposit as security for the performance of the Contract.
9 CAPABILITY
The Authority may require of any Bidder, proof of financial and technical capability to undertake the work for which its Bid is submitted.
10 INTERPRETATION OF APPROXIMATE ESTIMATE OF QUANTITIES
.1 The estimate of the quantities of work to be performed and materials to be furnished shown on Schedule "A" of the Bid and Agreement is approximate, and is given only as a basis of calculation upon which the award of the contract is to be made. The Authority shall not assume any responsibility that the Schedule of Quantities called for in the Bid shall be the same as the actual quantities required in the work. The Authority reserves the right to increase, decrease, or omit all or any of the quantities of work shown in the Bid and Agreement Form.
.2 The Authority reserves the right to make mathematical corrections to the extensions which may
change the estimated bid price. 11 COMMUNICATIONS
.1 The Project Manager for this Contract is Kevin Mattinson, Maintenance Supervisor.
.2 Inquiries shall be directed to the Project Manager at: Phone: 902-667-8757 Fax: 902-667-1686 Email: [email protected].
INSTRUCTIONS TO BIDDERS - CONSTRUCTION UNIT PRICE
PAGE 2 OF 2 Revised July 27, 2005
Michael Barton P.Eng, M.Eng, M.A. Engineering for Ecological Buildings
6250 Willow St., Halifax. Tel.902-956-4401
Scope of Work- Structural Preparation for PV and Bracing Upgrade
Four Winds, 16 Herrett Road, Springhill June 17, 2020
This work is required in order to allow photovoltaic panels to be mounted on the south side of the roof of this building and to address some structural issues identified during the inspection carried out to assess the ability of the structure to carry solar panels.
The building appears to be in fairly good repair though lateral bracing is patchy and some truss plates are tearing out. Also, diagonals, which are critical for the correct operation of lateral bracing are absent and will need to be added. As well, because of increasing snow loads and changing code requirements additional bracing is required throughout. That will bring the building closer (though not all the way) to a modern Part 4 building.
A complete inspection will need to be carried out to ensure that all trusses are sound before mounting PV on this building. A general inspection, on both the north and south sides, is recommended in any case in order to catch any developing issues.
Trusses carrying PV will have fairly extensive reinforcing.
Additional lateral bracing will be needed in some areas. Some trusses will need top chord reinforcing near the eaves, in order to accommodate the loads from PV.
1.0 Work to be Completed
1.1 Inspection of Truss Joints
Refer to Appendix A page 1 for a diagram of the truss areas
Areas 2,3 and 4 will have PV mounted. Those areas will have major reinforcing. The other areas will need repairs to existing problems and/or bracing added. Truss spacing is 24”
Some joints/nodes found to have excessive gaps between members and some plates in this building have plate tear-out (see Figs. 1 and 2 below). The current standard for the gap is 1/8” and no more than 1/16” of the teeth of a truss plate should be showing.
On areas with PV that are not already being reinforced, all joints with gaps greater than 1/8” average will need to be be reinforced with nailed plywood gussets (see attached diagram – Appendix A Pg. 2- 6). On the north side or areas that will not have solar panels, joints with gaps greater than 3/16” average will need to be reinforced. As well, any truss plate with more than 1/16” of tooth showing will need to be repaired in the same way (all areas on N and S).
There may also be truss plates that have been nailed back into place (see Fig.2 below). This is not the correct approach, but may be left “as is” in certain places if the repair is holding. On areas with PV repaired plates that used this method will need to be gusseted, so their location should be noted. As well, any other plates that have been repaired using this method AND that have teeth showing (any amount-plate not completely snug) will need to be repaired.
The contractor will inspect all joints and splices for excessive gap, misplaced or partly torn off plates or inadequate repair and note those needing repair. The south side of the roof is the most important in this respect, but all joints should be inspected.
Fig. 1 Example of a torn plate
Fig. 2 Example of a plate that has been nailed back into place Note also the excessive gap between members
Contractor to inspect joints/splices for damaged plates, excessive gaps, or inadequate repair
1.2 Reinforcing of Nodes/Joimts and Splices
Due to high stresses and the age of the building, certain joints/nodes and splices on the S side (and W side in area 4) will need reinforcing per Appendix A pages 2-5, with 1/2" plywood gussets on both sides using clinched 3"nails with the number of nails shown on the truss. The correct nailing pattern is shown in Appendix B page 2. Any plates that are tearing off, will need to be hammered snug first.
This is tantamount to a partial re-building of the trusses “in situ”. This looks to be about 340 joints/nodes.
Contractor to reinforce joints/nodes on S side of trusses in areas 2,3 and the W side of area 4
1.4 Repair of Nodes with Excessive Gaps or Truss Plate problems
Any nodes identified in the inspection should be repaired per Appendix A (attached) with 1/2” gussets on both sides (as in 1.2). I have estimated that 60 additional nodes/joints in this building will need repair, but that is only an initial estimate.
Contractor to repair joints and splices identified in the inspection
1.5 Installation of Continuous Lateral Bracing and Diagonals on Webs in Compression
These trusses have some patchy bracing and also need additional bracing. The bracing should be checked for bad laps (see Appendix B for correct technique) and bracing added per Appendix A. Diagonals should be added to all braced webs per Appendix B pg. 1. In some areas that will carry PV the 1x bracing peresent will need to be replaced with 2x4.
Contractor to add lateral bracing in all areas per Appendix A.
1.6 Reinforcing (Sistering) of Top Chords on the South Side to Allow for PV Mounting
In order to mount the photovoltaic panels, top chords on the south side will need to be reinforced as on Appendix A. This involves attaching scab members on one side of the top chord. Because of truss joint reinforcing, plywood furring strips will need to be added before the scab/sistering. As much as possible, the reinforcing should be on the same side of every truss. Contractor to sister parts of the top chord on S side of areas 2 and 3 and the W side of Area 4
A rea 4
Like this OR like this
Spacing between braces to be no more than 20'
Option for adding diagonals to webs with single lateral brace
NOTE -Correctly lapped lateral bracing here.
and Correct method for lapping bracing (from Atlas Truss Bracing Manual and Fine Homebuilding Mag.)
Page 1
Appendix B- Acceptable Nailing Pattern for webs and Chords (with minimum allowable nail spacing shown)
Page 2
Scope of Work- Structural Preparation for PV and Bracing Upgrade
Hillcrest Manor, 20 Junction Road, Springhill May 30, 2020
This work is required in order to allow photovoltaic panels to be mounted on the south side of the roof of this building and to address some structural issues identified during the inspection carried out to assess the ability of the structure to carry solar panels.
The building appears to be in good repair though lateral bracing is patchy and some truss plates are tearing out. Also, diagonals, which are critical for the correct operation of lateral bracing are largely absent and will need to be added. As well, because of increasing snow loads and changing code requirements additional bracing is required throughout. That will bring the building closer (though not all the way) to a modern Part 4 building.
A complete inspection will need to be carried out to ensure that all trusses are sound before mounting PV on this building. A general inspection, on both the north and south sides, is recommended in any case in order to catch any developing issues.
Additional lateral bracing will be needed in some areas. Some trusses will need top chord reinforcing near the eaves, in order to accommodate the loads from PV.
1.0 Work to be Completed
1.1 Inspection of Truss Joints
Some joints/nodes in another building were found to have excessive gaps between members and some plates in this building have a bit of plate tear-out (see Figs. 1 and 2 below). The current standard for the gap is 1/8” and no more than 1/16” of the teeth of a truss plate should be showing.
On the south side of this building, all joints with gaps greater than 1/8” average will need to be be reinforced with nailed plywood gussets (see attached diagram – Appendix A Pg. 2-6). On the north side or areas that will not have solar panels, joints with gaps greater than 3/16” average will need to be reinforced. Any truss plate with more than 1/16” of tooth showing will need to be repaired in the same way (all areas on N and S).
There may also be truss plates that have been nailed back into place (see Fig.2 below). This is not the correct approach, but may be left “as is” in certain places if the repair is holding. On the south side of the roof, repaired plates that used this method will need to be gusseted, so their location should be noted. As well, any other plates that have been repaired using this method AND that have teeth showing (any amount-plate not completely snug) will need to be repaired.
The contractor will inspect all joints and splices for excessive gap, misplaced or partly torn off plates or inadequate repair and note those needing repair. The south side of the roof is the most important in this respect, but all joints should be inspected.
Fig. 1 Example of a torn plate (from a different building)
Fig. 2 Example of a plate that has been nailed back into place Note also the excessive gap between members
Contractor to inspect joints/splices for damaged plates, excessive gaps, or inadequate repair
1.2 Repair of Nodes with Excessive Gaps or Truss Plate problems
Any nodes identified in the inspection above should be repaired per Appendix A (attached) with 1/2" plywood gussets on both sides using clinched 3"nails with the number of nails shown on the truss diagram in red, or air nails with adjusted numbers as shown. I have estimated that 25 nodes/joints in this building will need repair, but that is only an initial estimate.
Contractor to repair joints and splices identified in the inspection
1.3 Installation of Continuous Lateral Bracing and Diagonals on Webs in Compression
These trusses have some patchy bracing. The bracing should be checked for bad laps (see Appendix B for correct technique) and bracing added per Appendix A ( nailing pattern per App. B pg.2). Diagonals should be added to all braced webs per Appendix B pg. 1.
Contractor to add lateral bracing in all areas per Appendix A.
1.1.4 Reinforcing (Sistering) of Top Chords on the South Side to Allow for PV Mounting
In order to mount the photovoltaic panels, top chords on the south side will need to be reinforced as on Appendix A. This involves attaching scab members on one side of the top. As much as possible, the reinforcing should be on the same side of every truss. Contractor to sister top chord on Areas 1 through 7 on the S side of the building
Appendix A: Truss Areas Page 1
Appendix A: Area 1 Page 2
Appendix A: Areas 2 and 5 Page 3
Appendix A: Ares 3+6 Page 4
Appendix A: Area 4 Page 5
Appendix A : Area 7 Page 6
Appendix B: Correct Addition of Diagonals to Lateral Bracing
Like this OR like this
Spacing between braces to be no more than 20'
Option for adding diagonals to webs with single lateral brace
NOTE -Correctly lapped lateral bracing here.
and Correct method for lapping bracing (from Atlas Truss Bracing Manual and Fine Homebuilding Mag.)
Page 1
Appendix B- Acceptable Nailing Pattern for webs and Chords (with minimum allowable nail spacing shown)
Page 2
263100 Solar PV System