Civil and Structural Requirements

Site Preparation

The Contractor shall have fully surveyed the Site and the Site data prior to carrying out the detailed design to ensure all Site hazards have been identified and appropriate measures are in place to mitigate against any associated risk.
All the earthworks will be undertaken in accordance with applicable Standards and Laws.
Before undertaking any earthwork, the Contractor shall remove waste material, plants, top soil, structures and garbage from the Site as part of its Scope of Works. The Contractor shall also implement all the safety measures required before any work, including fencing the entire Site and installing appropriate warning signs and by setting up an adequate control at the entrance. Only authorised persons shall enter the Site during the execution of the Works.
Environmentally and culturally sensitive areas shall be identified and protected during construction according to the SEMP.
Any earthwork, including but not limited to digging, filling, levelling, creating embankments, removal of vegetation and trees and trenching shall be planned, designed and executed in accordance with the permits and the Applicable Law and in line with the prescriptions of the local authorities, including the environmental authority in charge.
Excavated materials usable for fills shall be spread in accordance with the levelling plan.
Unused materials and materials that are unsuitable for fills shall be disposed of in a location agreed in advance with the Employer.
Fill materials shall be suitable for the intended purpose and shall not include materials hazardous to health, materials susceptible to attack by ground or ground water chemicals, materials susceptible to swelling or shrinkage under changes in moisture content, highly organic or chemically contaminated materials, or any other unacceptable materials.
Filling shall be performed with appropriate material (crushed rocks of various size, sand) and shall be compacted to the densities specified in the design requirements.
Erosion shall be avoided. If required, erosion control works and materials, such as rock armour, headwalls, grass, rock surfacing, use of concrete and geotextile, shall be planned in advance, approved by the relevant authorities and implemented in a way that permanent erosion control is guaranteed.
Dust control measures shall be put in place during construction until Taking Over as necessary. Water shall be used for controlling the level of dust when possible. Suitable alternatives shall be evaluated by the Contractor in case use of water is not allowed or not possible.
Earthworks and any works generating dust at Site shall be avoided during commissioning or whenever electronic components are being installed, connected, set-up and do not have sufficient dust protection in place (cabin doors are open, filters are not installed, etc.). In any case, all components shall be duly cleaned from dust before energisation.
Subject to the Employers approval, areas of the Site which are not used for the Works are not required to be cleared, shall be stabilised, re-vegetated as required and restored in accordance with the Site plan and the permits.

Construction Equipment

All construction tools, machinery, equipment, cranes, cars and trucks entering and delivering Works on the Site shall conform to applicable safety Standards. Machines, cars and trucks shall be regularly registered as required by local regulations and shall be suitable for purpose and in good operating condition.

All lifting appliances, hoists and lifting gear shall be regularly tested and inspected throughout the duration of the Works in strict conformity with local regulations. Records shall be available for inspection by the Employer at any time.
The Contractor is responsible to see that hired cranes comply with the regulations and current certificates are available for inspection by the Employer.

Structural Design Principals

The Contractor shall design the structures based on the standards indicated herein and stated in these Employers Requirements.
All design reports, calculations and drawings prepared by the Contractor shall be signed by a certified structural engineer and, where required by the applicable laws, by a certified engineer licensed to operate
as such in the Country.
The Contractor shall make use of Finite Element Analysis (FEA) to calculate the loading conditions at any critical component, including bolts, joints and welding.
Dynamic loads shall be considered when these might lead to higher stresses and they shall be duly estimated using state-of-the-art tools and methodologies. A modal analysis shall be performed when necessary.
Fatigue assessment shall be performed should fatigue reasonably be considered critical, or potentially critical, for the component under evaluation.

Load Assumptions

In designing the Works, the Contractor shall take into account all the reasonably expectable loads that the Works might be subject to, including, but not limited to:
• Self-weight loads;
• Equipment loads;
• Personnel and vehicle loads;
• Wind loads;
• Thermal loads;
• Seismic loads;
• Snow loads (if applicable);
• Water (including flooding) loads.
The Contractor shall duly consider the loads and load combinations in accordance with the applicable codes.
The load combination leading to the worst loading condition shall be considered unless it is demonstrated that such an approach is unrealistically conservative for the purpose and the type of technology.

Wind Loads

The Contractor shall duly document the assumptions made using the national building Standards, available wind data, and any supporting material verifying the suitability of the structures and
components for the Site conditions.
Each component forming part of the Works shall be designed or verified against the expected wind loads.
This includes, but is not limited to, foundations, buildings, tracking systems, towers, module mounting systems, fences, PV modules and others.
The Contractor shall perform its own investigation on the maximum expected wind conditions over a return period compatible with the design lifetime and use of the Works and in any case for a return period of not less than 50 years.
All structures shall be designed for the same wind conditions regardless of their position in respect to other structures; these wind conditions shall be the worst expected at the Site including the Facility and the Interconnection Facilities. No wind shading shall be allowed.
Wind induced vortex shedding shall be taken into account and checked against the natural resonant frequencies of the structures. Wind-induced dynamic instability must be avoided.
In the case of trackers, deformation and twisting of the structures shall be considered whenever it leads to higher loads at the structure.
In the case of trackers, “structure in stow position” shall be verified considering a stowing angle of at least 5°. Moreover, lower wind speed at operating condition (typically the stowing wind speed) shall only be
considered when:
• it is demonstrated that sufficient back-up power is guaranteed to feed the trackers (UPS, diesel generator, local storage); and
• one anemometer is installed every weather monitoring station at least 2 m above the maximum height of the tracker in operational mode in a position where wind flow is not unduly affected by
the presence of obstacles.
Wind loads shall be duly combined with other loads as prescribed in the Standards by implementing adequate safety factors.
The Contractor shall seek the support of wind load tests, such as wind tunnel tests or computational fluid dynamics (CFD) tests, whenever necessary to demonstrate compliance with the aforementioned conditions and the applicable Standards.

Site Civil Works

Security Works – Civil
Perimeter Fence
The perimeter fence shall completely surround the Facility and will meet the following specifications;
It shall consist of a 2 m high chain link fence topped with barbed wire;
• All fences shall be a steel chain link fence (minimum 2 mm nominal diameter and maximum 50 mm mesh size);
The fence fabric shall be zinc, aluminium or PVC coated;
• Fence posts shall be either pre-cast concrete or steel posts with maximum 3 m distance, erected inside sufficiently deep concrete foundations;
• A 2 m wide strip shall be cleared of all vegetative growth on either side of the fence and shall be graded off to remove local irregularities before erection of the fence commences;
Foundations for security and check-point installations shall be suitably designed against forced entries by personnel and motor vehicles.
Anti-dig measures shall be put in place by the Contractor to prevent forcing of the fence including burying of the fence by at least 30cm below ground. Main Entrance and other Site gates
The main Site entrance design between the Site entrance and the public road and any other gates on Site will be of the following specifications:
Sized to permit the largest vehicles including abnormal load vehicles to enter the Site easily;
• It shall be fabricated from steel of compatible shape to the fences and shall conform to ASTM F900;
It will be manually operated;
Its hinges shall allow a 180 degree swing;
It shall have a central rest;
The gate will be of sufficient design and construction to prevent light vehicles entering and
prevent or delay heavy vehicles from entering without being opened;
• It will include a segregated foot path and access point for pedestrians.
Buyer’s Interconnection Facilities (KPLC Yard)
The KPLC yard will be accessed directly from the existing public road to the south of the Site without the requirement to pass through the Employer’s Facility.
The KPLC yard will be have the following security requirements:
Two meter high chain link fence to KPLC requirements
• Barbed wire to KPLC requirements,
Double swing chain link gate with centre peg and locking mechanism secured by padlock.
KPLC Control Building
The KPLC Control Building will be located near to the Buyer’s Interconnection Facilities as agreed with the Employer and with KPLC. The Site Control Building shall be a single building and shall include provision for:
Open plan office space for four persons;

One separate office with space for one desk;
Heating, air conditioning, power, and lighting throughout;
Internal office staff welfare facility, including separate male and female toilets;
Internal office staff kitchen bench and sink suitable for microwave, small fridge and basic lunch facilities;
• Welfare facilities (inclusive of wash rooms, toilets, locker and change space) suitable for 4 male staff and 4 female staff accessible without access to the office spaces for use by day staff;
• Change and locker room facilities suitable for 6 male staff and 6 female staff accessible without entering the office spaces;
Kitchen area with two workbenches, extract fan and plumbing;
One lockable, climate controlled, internal (no windows) SCADA room suitable for containing all SCADA control and telecoms equipment;
• One lockable, climate controlled battery storage room;
One suitably sized stores area (minimum of 100m2) complete with racking and designed to permit easy access for delivery vehicles and handling equipment such as pallet trucks;
• One small lockable room with shelving of minimum size of 10m2 for storage of special tools and small electrical Spare Parts,
Work bench area within the stores area.
The doors to the KPLC Control Building shall be sufficiently sized to facilitate easy installation, removal and maintenance of all panels and control room equipment.
Possibility to exit from two different doors in case of emergency shall be provided within the KPLC Control Building design and agreed with the Employer.
[DRAFTING NOTE: KPLC’s formal requirements for this project are still being discussed and will be provided in due course. For now, these are indicative]
Public Road Access
The Contractor shall design a suitably robust tie-in to the existing public road including the relevant junctions which will ensure the public road is not damaged by the construction or operation of the Works. The Contractor shall ensure the public road drainage system is maintained and shall install suitably sized culverts or replace the existing ones as necessary.
Access Track, Parking Areas and Laydown Areas
Access tracks shall be planned and constructed according to the Facility and Interconnection Facilities configuration proposed by the Contractor to permit the following:
Vehicle access from the Site entrance area to the Interconnection Facilities;
• Vehicle access within the Interconnection Facilities (KPLC yard and substation area)
Vehicle access to and within the Facility including the PV Site and the Seller’s Interconnection Facilities.
• Vehicle access throughout the PV Site to each of the inverter stations and as required to permit efficient construction and operations; and
Parking areas shall be planned and constructed according to the Facility and Interconnection Facilities configuration proposed by the Contractor to permit the following:

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