2021-07-19 Section 01 11 00 PV Solar Addition Summary of Work Page
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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
2021-07-19 Section 01 11 00 PV Solar Addition Summary of Work Page
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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.
2021-07-19 Section 01 11 00 PV Solar Addition Summary of Work Page
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.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 co- ordinated 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.
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Work Electrical
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.
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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.
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Work Electrical
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.
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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
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Specification
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.
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Specification
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 turn- over.
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.
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Specification
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
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Specification
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.
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Specification
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
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Specification
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.
2021-07-19 Section 26 31 00 PV Solar Addition Page 8 of 9 System
Specification
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
2021-07-19 Section 26 31 00 PV Solar Addition Page 9 of 9 System
Specification
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.
BID AND AGREEMENT - CONSTRUCTION UNIT PRICE PAGE 2 OF 4
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.
BID AND AGREEMENT - CONSTRUCTION UNIT PRICE PAGE 3 OF 4
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
BID AND AGREEMENT - CONSTRUCTION UNIT PRICE PAGE 4 OF 4
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.
CONSTRUCTION UNIT PRICE G.C.-2
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.
CONSTRUCTION UNIT PRICE
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.
CONSTRUCTION UNIT PRICE
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.
CONSTRUCTION UNIT PRICE G.C.-6
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).
Michael Barton P.Eng, M.Eng, M.A. Engineering for Ecological
Buildings
6250 Willow St., Halifax. Tel.902-956-4401
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
Michael Barton P.Eng, M.Eng, M.A. Engineering for Ecological
Buildings
6250 Willow St., Halifax. Tel.902-956-4401
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
Michael Barton P.Eng, M.Eng, M.A. Engineering for Ecological
Buildings
6250 Willow St., Halifax. Tel.902-956-4401
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
6250 Willow St., Halifax. Tel.902-956-4401
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.
Michael Barton P.Eng, M.Eng, M.A. Engineering for Ecological
Buildings
6250 Willow St., Halifax. Tel.902-956-4401
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
Michael Barton P.Eng, M.Eng, M.A. Engineering for Ecological
Buildings
6250 Willow St., Halifax. Tel.902-956-4401
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