General

Project Profile

Project Title	Construction of New 380/33 KV Ashayrah Wind BSP (WOA), Taif Region, Saudi Arabia — Balance of Plant (BOP), including all civil, structural & precast concrete works, on a design-build basis against Spec No. PTS-25WN366.
End Client	National Grid SA (NGSA) — formerly SEC/National Grid, Saudi Arabia
Main Contractor (Tier-1)	Elsewedy Electric — PSP Division ("Elsewedy PSP"), referred to as "CONTRACTOR" throughout the tender documents
KPC's Role	Precast Concrete Subcontractor ("SUBCONTRACTOR") — reporting to Elsewedy PSP, not directly to National Grid SA
Reference Spec	PTS-25WN366 — Final SOW/TS for Construction of New 380/33 KV Ashayrah Wind 380KV BSP (Rev.0, 26-Feb-2026), Appendix-25: Precast Concrete Building
BOQ Reference	"Ashayrah Precast Concrete BOQ.xlsx" — Civil BOQ for Construction of New 380/33 KV Ashayrah PV BSP, Rev.00, 14-Apr-2026
Multi-Site Program	The precast building standard is unified across three NGSA BSP sites: Masturah, Al Asharya (this tender), and Al Majmaa — same precast typology, repeatable design intended to reduce mold/variation across sites

Qualification & Roles

Contract Hierarchy

Contracting Structure	NGSA (Employer) → Elsewedy PSP (Tier-1 Contractor) → KPC Precast (Subcontractor). KPC has no direct contract with NGSA; all approvals, RFIs, and instructions flow through Elsewedy PSP.
Governing Standards KPC Must Hold	TES-Q-113.01 (Design Criteria for Precast & Prestressed Concrete Structures), TCS-Q-113.04 (Precast Concrete Works), SEEDS-II (submittal/title block standard). Precast Manufacturer qualification against these standards should be documented in the technical proposal.
Guarantee Obligation	KPC/Precast Manufacturer must issue a formal Guarantee Letter certifying the precast system and connections are safe under all loading cases including seismic and diaphragm action — see "Warranty & Guarantee Obligations".

Not applicableNo joint venture, consortium, or multi-partner structure is referenced anywhere in the tender package for the precast scope — KPC is engaged as a single, standalone subcontractor to Elsewedy PSP.

Commencement

Gated Start

Production Start Gate	Per Appendix-25 Section 4: "CONTRACTOR shall not proceed with production of precast elements unless full interface synchronization with the substructure design has been verified and approved." KPC cannot start fabrication on commencement date alone — it is contingent on substructure design sign-off.
Pre-Production Submittals	Structural models/calculations, reaction force summaries, and material pre-approval certificates must be submitted and approved before commencement of production — see Submittal List.
Special Techniques Disclosure	Any special fabrication techniques (double casting, insulation methods) must be documented at the outset and included in the baseline schedule — cannot be introduced after commencement without replanning.

Key Dates

Incomplete Data

Overall Project Duration	5 months (per Appendix-01 "Schedule.xlsx")
Commencement Date	Not populated in the schedule sheet provided — cell is blank
Delivery / Completion Date	Not populated in the schedule sheet provided — cell is blank
Recommendation	Raise a formal clarification (Appendix-05 Clarification Form) to obtain firm commencement and delivery dates, and the substructure design-freeze date, before finalizing KPC's fabrication and erection program.

KPC Scope of Work — At a Glance

Precast Only

Buildings with precast scope

Full superstructure buildings (GIS + Control)

Roof-slab-only buildings

~4,340 m²

Precast insulated wall panels (GIS + Control, largest items)

45 MPa

Prestressed member concrete grade

Full Precast Superstructure	380 KV GIS Building, Control & 33kV SWGR Building — columns, beams, parapets, door canopies, stair flights/landings, double-tee slabs, hollow-core slabs, insulated wall panels, shear walls
Roof-Slab-Only Scope	Customer Building, Security Building, Fire Pump Building, Gate Room, Gate Room Toilet, Tunnel Stairs — precast roof/HCS only per the Building List (though the BOQ shows additional wall/column line items for some of these — see "Change in Scope")
Ancillary Precast Items	Precast canopies for staircases, precast trench covers (100–200mm), splash blocks (200x200 & 400x400mm), scupper drains, downspout covers, precast curb stones, precast fire-wall panels/columns (Transformer & Reactor bays), precast boundary/fire walls
Explicitly Excluded from KPC	Cast-in-place (CIP) substructure/foundations, structural steel works, waterproofing membrane application (KPC supplies embeds only), internal/external paint on precast walls (referred to Architectural BOQ), HVAC/MEP equipment

Precast BOQ — Key Quantities by Building

From Appendix-04

Building	Precast Element	Qty	Unit
380 KV GIS Building Full superstructure	Ground columns	441.6	m³
Roof beams	145.8	m³
Intermediate beams	75.9	m³
Parapet	132.5	m³
Door canopies	6.6	m³
Stair steps & landings	37.5	m³
Double-T slab, 600mm	2,320.0	m²
Hollow core slab, 200mm	97.6	m²
Insulated wall panels, 260mm / Shear wall	4,039.9 / 404.3	m²
Control & 33kV SWGR Building Full superstructure	Superstructure columns	77	m³
Roof beams	115	m³
Parapet	63	m³
Door canopies	10	m³
Double-T slab, 1000mm	1,080	m²
Hollow core slab (600/400/250mm)	518 / 510 / 64	m²
Insulated wall panels, 260mm	1,290	m²
Shear wall, 260mm	280.4	m²
Customer Room Roof-slab-only per building list, but BOQ carries full walls/columns	Hollow core slab, 400mm	951.2	m²
Insulated wall panels, 260mm	1,944.8	m²
Ground columns / roof beams	97.2 / 97.2	m³
Security Equipment Building	Ground columns / roof beams	18.9 / 16.8	m³
Hollow core slab, 250mm / Insulated wall, 260mm	99.9 / 336	m²
Gate House	Ground columns / roof beams	5.25 / 3.36	m³
Blast-resistant wall panel, 320mm	92	m²
Pump House (UG Water Tank)	Columns / roof beams / HCS 400mm / wall panels	18 / 18.3 / 93.8 / 87.2	m³ / m³ / m² / m²
Yard, ducts, roads	Trench covers, splash blocks, curb stones	325.3 / 428.5 m² · misc pcs	mixed

Building

Precast Element

Qty

Unit

380 KV GIS Building

Full superstructure

Ground columns

441.6

m³

Roof beams

145.8

m³

Intermediate beams

75.9

m³

Parapet

132.5

m³

Door canopies

6.6

m³

Stair steps & landings

37.5

m³

Double-T slab, 600mm

2,320.0

m²

Hollow core slab, 200mm

97.6

m²

Insulated wall panels, 260mm / Shear wall

4,039.9 / 404.3

m²

Control & 33kV SWGR Building

Full superstructure

Superstructure columns

m³

Roof beams

115

m³

Parapet

m³

Door canopies

m³

Double-T slab, 1000mm

1,080

m²

Hollow core slab (600/400/250mm)

518 / 510 / 64

m²

Insulated wall panels, 260mm

1,290

m²

Shear wall, 260mm

280.4

m²

Customer Room

Roof-slab-only per building list, but BOQ carries full walls/columns

Hollow core slab, 400mm

951.2

m²

Insulated wall panels, 260mm

1,944.8

m²

Ground columns / roof beams

97.2 / 97.2

m³

Security Equipment Building

Ground columns / roof beams

18.9 / 16.8

m³

Hollow core slab, 250mm / Insulated wall, 260mm

99.9 / 336

m²

Gate House

Ground columns / roof beams

5.25 / 3.36

m³

Blast-resistant wall panel, 320mm

m²

Pump House (UG Water Tank)

Columns / roof beams / HCS 400mm / wall panels

18 / 18.3 / 93.8 / 87.2

m³ / m³ / m² / m²

Yard, ducts, roads

Trench covers, splash blocks, curb stones

325.3 / 428.5 m² · misc pcs

mixed

Note: Unit rates and totals are blank in the tender BOQ (SAR columns not populated) — KPC is expected to price these quantities in its commercial offer. Figures above pulled directly from "Ashayrah Precast Concrete BOQ.xlsx" sheets .1–.3.

Technical Requirements Snapshot Appendix-25

KPC's scope explicitly includes engineering, production, fabrication, delivery & erection of: columns, beams, external/internal wall panels, insulated wall panels, shear walls, hollow-core slabs / double-tee slabs, stair flights & landings, canopies, and embedded accessories.
Design basis: TES-Q-113.01 (Design Criteria for Precast & Prestressed Concrete) and TCS-Q-113.04 (Precast Concrete Works) — these govern over ACI 318M / ASTM references, which apply only where COMPANY standards are silent.
Concrete strength: 45 MPa for prestressed members; 40 MPa for non-prestressed beams/columns.
Structural screed: min. 80mm thick, mesh Φ8 @ 150mm c/c, acting as a diaphragm (PCA Ch.4 elastic analysis).
KPC/Precast Manufacturer must issue a Guarantee Letter certifying elements and connections are safe under all loading, incl. seismic and diaphragm action — a binding warranty commitment to flag in the offer.
Special fabrication techniques (e.g., double casting, insulation) must be disclosed upfront and baked into the baseline schedule — undisclosed methods risk being rejected mid-project.

Design Loads KPC Must Design To

Roof dead load: per TA-800024 or 3 kPa, whichever governs; live load 1.5 kPa (accessible roofs).
Rooftop HVAC (PACU): where design not finalized, assume conservative 8-ton units (4 units on GIS building roof, 4 on Control building roof, 2 on Customer room roof per Appendix-04 notes) applied as dead load with impact factor across the full roof.
Overhead crane: 5.0-ton capacity assumption if vendor data unavailable; 25% vertical impact, 20% lateral, 10% longitudinal factors on crane runway beams.
Wind: ASCE 7-10, ultimate load factor 1.6, importance factor 1.15, 150 km/h, Exposure C.
Seismic: SBC-301 Table 12.1 response modification factors; importance factor 1.25; ASCE 7-10 parameters per SBC region.
U-values (thermal): revised targets — roof 0.2555 W/m²·K (from 0.34), wall 0.352 W/m²·K (from 0.568) — tighter insulation spec than typical, affects panel design/cost.

Interface Coordination & Deliverables — Where KPC Carries Risk

Watch Items

Area	What the Spec Requires of KPC
CIP Substructure Interface	KPC must fully coordinate precast-to-cast-in-place interfaces (base plates, anchor bolts, grout pockets, starter bars, bearing pads) before production starts. No production may proceed until interface sync is verified/approved by Elsewedy/NGSA — this is a hard gate that can stall fabrication if substructure design lags.
Structural Model & Reactions	KPC/precast manufacturer must submit full structural models, calculations, and factored/non-factored reaction forces in a format compatible with the substructure designer's software and sign convention — a non-trivial coordination deliverable, not just shop drawings.
RFI Discipline	Any discrepancy between precast and CIP substructure design must go through a formal technical RFI — informal site fixes are explicitly disallowed ("No modifications shall be made on site without formal written approval").
Shop Drawings / Submittals	Complete precast drawings (dimensions, reinforcement, embeds, lifting inserts, erection marks, weight estimates) + structural calc packages (flexure/shear/serviceability per ACI 318M) + material pre-approval certificates (mix design, rebar, strand, grout, bearing pads). All per SEEDS-II title blocks/annotation standards.
Unified Design Program	NGSA is standardizing precast member sizes across all three BSP sites (Masturah / Al Asharya / Al Majmaa) with only "slight variation margin related to customized mold size" allowed per manufacturer — KPC's own mold inventory should be checked against this unified sizing before committing to unit rates.
Late Changes	Equipment/room/door/penetration changes affecting precast must be finalized at design stage; late changes require NG approval and revised design before shop drawings can be released — a real schedule risk if MEP/architectural finalize late.

Area

What the Spec Requires of KPC

CIP Substructure Interface

KPC must fully coordinate precast-to-cast-in-place interfaces (base plates, anchor bolts, grout pockets, starter bars, bearing pads) before production starts. No production may proceed until interface sync is verified/approved by Elsewedy/NGSA — this is a hard gate that can stall fabrication if substructure design lags.

Structural Model & Reactions

KPC/precast manufacturer must submit full structural models, calculations, and factored/non-factored reaction forces in a format compatible with the substructure designer's software and sign convention — a non-trivial coordination deliverable, not just shop drawings.

RFI Discipline

Any discrepancy between precast and CIP substructure design must go through a formal technical RFI — informal site fixes are explicitly disallowed ("No modifications shall be made on site without formal written approval").

Shop Drawings / Submittals

Complete precast drawings (dimensions, reinforcement, embeds, lifting inserts, erection marks, weight estimates) + structural calc packages (flexure/shear/serviceability per ACI 318M) + material pre-approval certificates (mix design, rebar, strand, grout, bearing pads). All per SEEDS-II title blocks/annotation standards.

Unified Design Program

NGSA is standardizing precast member sizes across all three BSP sites (Masturah / Al Asharya / Al Majmaa) with only "slight variation margin related to customized mold size" allowed per manufacturer — KPC's own mold inventory should be checked against this unified sizing before committing to unit rates.

Late Changes

Equipment/room/door/penetration changes affecting precast must be finalized at design stage; late changes require NG approval and revised design before shop drawings can be released — a real schedule risk if MEP/architectural finalize late.

Not specified in provided documentsNo payment milestones, advance payment percentage, retention percentage, or payment schedule were found anywhere in the uploaded package (PTS spec, BOQ, DOR, schedule, clarification form). This is a strong candidate for a clarification request before KPC submits pricing, since payment terms materially affect the precast supplier's cash flow given significant upfront mold/material costs.

Not specified in provided documentsNo bid evaluation methodology, weighting, or qualification thresholds are included in this package — likely held at the Elsewedy PSP tender/procurement level rather than in the technical appendices provided to KPC.

Change in Scope

Internal Inconsistency Found

Building List vs. BOQ Mismatch	"Precast Building List.xlsx" tags Customer Building, Security Building, Fire Pump Building, Gate Room, and Tunnel Stairs as "Roof Slab only" scope. However, the BOQ ("Ashayrah Precast Concrete BOQ.xlsx") carries full column, beam, and insulated-wall-panel line items for the Customer Room, Security Equipment Building, and Gate House. This is a material scope-definition conflict.
Commercial Impact	If the wider BOQ scope is correct, KPC's pricing basis is materially larger than the "roof slab only" label suggests (e.g., Customer Room alone carries ~1,945 m² of insulated wall panel and ~194 m³ of columns/beams in the BOQ, not reflected in the building list description).
Recommended Action	Raise via the Clarification Form (Appendix-05) before bid submission to lock down the correct scope boundary per building — do not price silently against either document as authoritative.
Future Change Control	Per Appendix-25 Section 4(K), any late change to equipment/room/door coordination affecting precast must be approved by NG and reflected in a revised design before shop drawings are released — this is the formal mechanism for any change post-award.

Not specified in provided documentsNo liquidated damages clause, daily/weekly LD rate, or LD cap was found in the tender package provided. This sits in the main subcontract agreement, which was not part of this upload — recommend requesting it before bid finalization given the tight 5-month project duration.

Customs Duties, Taxes & Logistics

From Appendix-02 (DOR), Section E

Customs Clearance & Fees	Subcontractor (KPC) scope — for both permanent Plant/Equipment/Material and temporary construction equipment, "if applicable"
Customs Duties & Taxes	Subcontractor (KPC) scope — same basis as above
Shipping & Transport	KPC responsible for shipping documents, packing/material/inventory lists, road surveys, and heavy-lift transportation for precast plant/material — relevant given large precast units (e.g., double-tee slabs, wall panels) likely fabricated off-site and moved to a Taif-region wind BSP location.
Unloading & Inventory	KPC responsible for unloading at both site warehouse and final installation location, unpacking inspection/reporting, and its own inventory control.
Commercial Note	Since customs, duties, and heavy-lift logistics sit fully with KPC, factor cross-border/import costs (if precast elements or specialized formwork are sourced outside KSA) explicitly into the unit rates rather than treating them as reimbursable.

Not specified in provided documentsNo insurance requirements (CAR, third-party liability, professional indemnity, minimum sums insured) are addressed in the appendices provided. Typically held in the main subcontract terms — recommend confirming coverage requirements before bid, particularly professional indemnity given KPC is taking design responsibility for the structural precast system.

Not specified in provided documentsNo claims notification procedure, dispute resolution mechanism, or arbitration seat/rules are included in this package. These clauses typically sit in the commercial subcontract agreement rather than the technical appendices reviewed here.

Warranty & Guarantee Obligations

Legal Review Recommended

Guarantee Letter	Per Appendix-25 Section 2(F): "CONTRACTOR / Precast Manufacturer shall issue Guarantee Letter that precast structures elements (columns, beams, canopies, staircase, roof & parapets, HCS and TT-slab) system and its connections will be safe to be done under all cases of loadings including seismic forces, lateral forces and cast in-situ structural screed act as diaphragm."
Nature of Obligation	This is a structural performance warranty (not just a workmanship/materials warranty) — it effectively certifies the whole precast system's behavior under seismic and lateral loading, including its interaction with the in-situ screed diaphragm.
Shop Drawing Control	"No shop drawing, fabrication, or site modification is permitted without written NG/SEC approval and full interface coordination with all disciplines" — KPC has no unilateral authority to adjust details on its own once designs are approved.
Decorative/Architectural Finality	"All decorative or non-standard architectural features must be finalized and approved at the design stage. No late variation orders for such items will be considered" — protects KPC from late architectural changes, but also means KPC must lock in finishes early.
Recommendation	Have legal/insurance review the Guarantee Letter wording before signature — confirm it does not extend KPC's liability beyond standard structural design responsibility, and check professional indemnity coverage aligns with this scope.

Division of Responsibility (Appendix-02) — Subcontractor Obligations

Broad Sub Scope

General Pattern	The DOR is written almost entirely "X = Subcontractor" — KPC (as Subcontractor) carries nearly all site-level, HSE, logistics and self-support obligations; Elsewedy PSP only carries office/labor-camp land allocation, site perimeter security, construction electricity source, fire truck/ambulance, first-aid facility, and waste-water treatment.
Design & Submittals	Subcontractor scope: design drawings, workshop drawings incl. bar bending schedules, as-built drawings, material submittals/certificates, sample approvals — all fully on KPC.
Site Facilities	KPC must provide its own labor camp, storage, workshops (land only from PSP for storage/workshop use), running costs, security/fencing of its own facilities, sanitation, first-aid clinic.
Lifting & Equipment	KPC is responsible for ALL temporary lifting equipment (cranes, hoists, tower cranes) including calculation sheets, plus scaffolding/shoring and hard-standing prep for cranes — significant cost and schedule item for a precast erection scope of this size.
Utilities	Construction water source is KPC's; construction electricity source is Elsewedy PSP's, but distribution/connection to KPC's work areas is KPC's responsibility.

Submittal List of Documents

Appendix-25, Attachment-4

Precast Superstructure Drawings	Ground floor precast walls dowel layout Ground floor columns bolts layout Ground floor walls plan layout Ground columns plan layout Lower roof framing / loading plan / walls layout / screed layout Upper roof framing / loading plan / screed layout Elevations, building sections, wall sections Stair layout and stair sections Connection details, typical reinforcement details
Design Calculation Package	Comprehensive structural calculations verifying flexural, shear, and serviceability performance per ACI 318M; full structural model with factored/non-factored reaction forces compatible with the substructure designer's software.
Material Certificates	Pre-approval certificates for concrete mix designs, reinforcement steel, prestressing strand, grout materials, lifting inserts, embedded plates, bearing pads, and connection accessories — each referencing applicable standards and batch IDs.
Reference Attachments in Spec	Attachment-1: Precast Connection Details · Attachment-2: Waterproofing Details · Attachment-3: Canopy Precast Connection Details · Attachment-4: Additions to Unified Design Submittal List (Appendix-3) — all marked "conceptual/guidance only," actual dimensions/reinforcement to be engineered by KPC.

Commercial & Bid Strategy Notes

For PropelPro / Dimensionless Support

Pricing Basis	BOQ quantities are provided but unit rates (SAR) and totals are blank — this is a rate-and-total tender; KPC needs to submit its own unit pricing sheet against the ~90 line items across sheets .1–.3.
Repeatability Angle	Because the precast typology is being unified across Masturah, Al Asharya and Al Majmaa, KPC could price a mobilization/mold-amortization discount if bidding for multiple sites, or flag this as a negotiation lever if only bidding Al Asharya alone.
Schedule Risk	Overall project duration is only 5 months per Appendix-01 — very tight for full-superstructure precast (GIS + Control buildings) given the CIP interface gating condition ("no production until interface sync verified"). Recommend an explicit RFI/clarification on substructure design freeze dates before committing to this duration.
Warranty Exposure	The mandatory Guarantee Letter (Section 2-F) covering seismic/lateral/diaphragm performance of the full precast system is a structural performance warranty, not just a workmanship one — legal/insurance review recommended before signature.
Open Items to Clarify	(1) Actual commencement/delivery dates (schedule sheet blank); (2) the roof-slab-only vs. full-BOQ scope conflict flagged under "Change in Scope"; (3) payment terms, LDs, insurance and dispute clauses — none of which appear in this technical package and should be obtained from the commercial subcontract agreement.

Note: Please review AI content accuracy. Generated by PropelRead from Appendix.01 (Schedule), Appendix.02 (D.O.R – Civil), Appendix.04 (BOQ & Precast Building List), Appendix.05 (Clarification Form), Appendix.06 (PTS-25WN366, Appendix-25) of the Ashayrah 380KV SS tender package.