LPES International
LPES International
Protection to Perfection
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Services Design Drawings & BOQ

Technical Documentation & Autocad Support

At LPES International, we believe clarity is the foundation of safety. That’s why we offer comprehensive AutoCAD enabled technical documentation designed to give clients a complete, transparent understanding of how their lightning protection, earthing, and surge safety systems will be implemented long before execution begins.

Our process is structured with precision and guided by global standards. We start by preparing a detailed BOQ (Bill of Quantity) that outlines every required component with accuracy, ensuring project clarity, cost control, and compliance. Following this, our engineering team develops structure specific layout drawings using AutoCAD, visually mapping the entire protection strategy to reflect site dimensions, risk exposure, and architectural constraints.

To complete the process, we conduct a final risk assessment that evaluates real world vulnerabilities and verifies that the proposed system meets all safety parameters and performance expectations. This step ensures that every design is optimized, compliant, and ready for flawless execution

With LPES, technical documentation isn’t just paperwork it’s a commitment to precision, transparency, and engineering integrity. It empowers clients to make informed decisions and ensures that every project moves forward with clarity,confidence, and  uncom promised safety Together, these documents form a single,integrated engineering roadmap giving clients:Full visibility into system design and material requirements
Clear installation guidance for EPC teams and contractors Assurance of compliance with IEC, IS, and industry specific
standards Confidence in the safety plan before any on site activity begins.
LPES International - Protection to Perfection

Lightning, surge and earthing protection for mission-critical industrial infrastructure. Designed, assembled and tested in-house by LPES International.

Phone: 08043888915

Email: info@lpesinternational.com

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Corporate Address – Asia

ILD Trade Centre, 6th Floor, Office No. 617
Sector-48, Gurugram – 122018, Haryana
Near Subhash Chowk


  • Corporate Address – Europe

    • 1119 Budapest,
    Csurgoi ut 22-32A,
    37 Hungary, Europe

    GSTIN: 06AAICR2536D2ZL  |  CIN: U74999HR2017PTC068669

    © Copyright 2026 @ LPES Company. All Rights Reserved.


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    Home  /  Services  /  Design & Engineering  /  Design Drawings & BOQ
    Design & Engineering · Pre-sales Engineering

    Drawings your consultant can approve. A BOQ your contractor can build.

    Structure-specific lightning protection, earthing and surge protection layouts drawn in AutoCAD, with a BOQ where every line carries an LPES part code, and an IEC 62305-2 risk assessment that justifies the protection level you are paying for.

    Send your drawingsRequest a site assessment

    Prefer to talk? 080 4388 8915 ·

    LPES · Roof plan · LPS layout● Rev 0 · For approval
    AHU / plantMesh 10 × 10 m · LPL IIAir terminals · Ø16 mm Cu-bondedDown conductors ≤ 10 m spacingType B ring earth electrode · test joint at every DC
    Lightning protection layoutIEC 62305-3 · IS/IEC 62561
    Scale1:200
    SheetLP-01
    FormatDWG + PDF
    6+drawing sets in one coordinated package
    100%of BOQ lines carry an LPES part code and datasheet
    4standards families covered: IEC 62305, IS 3043, IEEE 80, CEA 2023
    DWG+PDFeditable CAD for your consultant, PDF for approval
    What you receive

    One package. Every drawing and document an approval needs.

    Pick a deliverable to see what it shows, the standard it is drawn to and what your reviewer will check.

    Lightning risk assessment

    IEC 62305-2NASA LIS/OTD flash density

    Before anything is drawn, we calculate whether the structure needs protection and at what level. Risks R1 (loss of life) and, where relevant, R2–R4 are compared with the tolerable risk, using local ground flash density, collection area, occupancy and the services entering the building.

    • Collection area Ad from true length, width and height
    • Risk components RA, RB, RC, RM and more, shown line by line
    • Lightning Protection Level (LPL I–IV) and SPD requirement justified
    • Report your consultant can audit, not a single number

    Lightning protection layout

    IEC 62305-3IS/IEC 62561NBC 2016

    Roof plans and elevations showing the air-termination system, sized by rolling sphere, mesh and protection-angle methods. Down-conductor routes, test joints and the connection to earth are drawn to the dimensions of your structure.

    • Air terminals, mesh conductors and fixings at the specified spacing
    • Down conductors at the spacing your LPL requires
    • Separation distance s checked at every metal crossing
    • Natural components (rebar, metal roofs) used where they qualify

    Earthing layout

    IS 3043IEEE 80CEA Reg. 41–43

    Electrode positions, ring or foundation earth electrode, inspection pits and conductor sizes, designed from soil resistivity and fault current. Every pit is numbered so the installer, inspector and maintenance team use one reference.

    • Type A rods or Type B ring, chosen for the soil and structure
    • PE and bonding conductors sized for fault current
    • Target earth resistance stated with the calculation behind it
    • Pit schedule ready for the Protection Passport register

    Equipotential bonding & SPD / LPZ

    IEC 62305-4IEC 61643-11IS 732

    Lightning protection zones drawn on your single-line diagram. Each zone boundary gets the right SPD type, and every incoming service — power, data, metal pipes — is bonded at the point of entry.

    • LPZ 0 / 1 / 2 boundaries with SPD Type 1, 2 and 3 coordinated
    • Main earthing terminal and bonding bar details
    • Data, signal and PV lines covered, not just power
    • Let-through voltage checked against equipment withstand

    BOQ with LPES part codes

    Tender-readyDatasheets linked

    Quantities taken from the drawings, not estimated. Each line names the material, size and finish and carries an LPES part code with its datasheet, so a tender can be priced and compared without guesswork.

    • Item, description, size, unit, quantity and part code
    • Exclusions and deviations listed openly
    • Excel for pricing, PDF for the record
    • Supply-only or supply-and-install versions

    Approval dossier

    Consultant reviewAuthority submission

    Everything a reviewer asks for, in one bound set: design basis, calculations, typical installation details, product datasheets and test certificates, and a compliance matrix clause by clause.

    • Design basis and assumptions stated
    • Typical details: test joint, pit, roof fixing, bonding
    • Compliance matrix against the specification
    • Revision control until the drawings are approved
    Try the design logic

    One choice drives the whole layout

    The Lightning Protection Level from your risk assessment sets the rolling-sphere radius, the mesh size and how far apart the down conductors may be. Change it and see what moves.

    20mRolling-sphere radius
    5 × 5mMaximum mesh size
    10mTypical down-conductor spacing
    0.08Separation-distance factor ki

    Values from IEC 62305-3 Tables 2, 4 and 10. Your design uses your structure's real geometry; this is an illustration, not a design.

    r = 20 mBuildingWhere the sphere touches is where lightning can strike — so it needs an air terminal.
    How it works

    From your drawings to an approved design in seven steps

    You send what you have

    Architectural plans and elevations (DWG preferred), roof details, the single-line diagram and site location. If soil resistivity is not available we measure it by the Wenner four-pin method.

    We quantify the risk

    An IEC 62305-2 assessment using the local ground flash density sets the Lightning Protection Level and tells you whether surge protection is required — so the design is neither under- nor over-specified.

    We draw the lightning protection system

    Air-termination by rolling sphere, mesh and protection angle; down conductors at the spacing your LPL requires; separation distance checked wherever metal services come close.

    We design the earthing

    Electrode type, quantity and layout from soil data and fault current to IS 3043 and IEEE 80, with step and touch voltage checked where people walk.

    We coordinate bonding and SPDs

    Lightning protection zones on your SLD, SPD types at each boundary, and every incoming service bonded at entry to IEC 62305-4.

    We take off the BOQ and assemble the dossier

    Quantities measured from the drawings, part-coded and linked to datasheets, with calculations, typical details and a compliance matrix.

    We stay until it is approved

    Consultant comments are answered and drawings revised under revision control. The approved set becomes the basis for supply, installation and the LPES Protection Passport.

    Inputs we need

    Start with what you have

    Incomplete inputs are normal at tender stage. We state every assumption on the drawing so nothing is hidden.

    Limitations. Designs are based on the information supplied. Where site conditions, soil data or structural details are unknown, we state the assumption and recommend verification before construction. ESE-based designs to NF C 17-102 are prepared only where your specification calls for them.

    1. Architectural drawings — plans, elevations and sections, DWG or PDF
    2. Roof details — material, parapets, rooftop plant, solar PV
    3. Electrical single-line diagram — incomers, DBs, critical loads
    4. Soil resistivity — or we measure it on site
    5. Site location — for ground flash density and the risk assessment
    6. Your specification — tender spec, consultant notes, preferred standards
    Scope at a glance

    Deliverables, standards and format

    DeliverableWhat it showsStandardFormat
    Risk assessment reportR1–R4 against tolerable risk, LPL and SPD needIEC 62305-2PDF
    LPS layout — roof plan & elevationsAir-termination, down conductors, test joints, separation distanceIEC 62305-3 · IS/IEC 62561DWG + PDF
    Earthing layout & pit scheduleElectrodes, ring, conductors, numbered pits, target resistanceIS 3043 · IEEE 80 · CEA 2023DWG + PDF
    Bonding & SPD / LPZ schemeZones on SLD, SPD types, bonding at entryIEC 62305-4 · IEC 61643-11DWG + PDF
    Typical installation detailsRoof fixing, test joint, pit, bonding, exothermic jointIS/IEC 62561DWG + PDF
    BOQQuantities, sizes, LPES part codes, datasheetsYour specificationExcel + PDF
    Approval dossierDesign basis, calculations, compliance matrix, certificatesAs specifiedPDF

    Turnaround and fee are fixed in the proposal before work starts, based on the size and completeness of the inputs.

    Who it is for

    Built for the people who sign off, price and build

    Consultants

    Approve with confidence

    Calculations and clause references you can check line by line.

    EPC contractors

    Price the tender right

    A measured, part-coded BOQ instead of a lump-sum guess.

    Plant owners & EHS

    Protect what matters

    Protection level matched to real risk, documented for audits.

    Installers

    Build it once

    Drawings with dimensions, details and pit numbers on site.

    Connected across LPES

    Solutions, products and services this design specifies

    Solutions

    Flat roof LPSPitched & tile roofMetal & PEB roofFacade & down conductorsIsolated LPSStructural earthingRing earth electrodeFoundation earth electrodeEquipotential bondingSurge protection by LPZRooftop solar PVStep & touch voltage

    Products in the BOQ

    Air terminal rodsLPS conductorsConductor holdersClamp connectorsTest jointsEarth electrodesEarthing strips & cablesEarth pits & coversExothermic weldingEquipotential bondingType 1+2 SPDsStrike counters

    Related services

    Lightning risk assessmentBOQ & tender supportSite assessmentDesign tools & calculatorsInstallation & commissioningPeriodic inspection & testingAnnual maintenance contractLightning to Load method

    Industries we design for

    Commercial buildingsData centresHospitalsPharmaceuticalCementChemicals & fertilisersOil, gas & hazardousRenewable energySubstations & T&DAirportsRailwaysReal estate
    Questions

    Before you send drawings

    Still unsure what you need? See all FAQs or talk to us.

    Do you design to IEC 62305 or to NF C 17-102 (ESE)?

    Our default is IEC 62305 with IS/IEC 62561 components, which is what IS and NBC reference in India. Where your specification calls for an ESE air terminal, we design to NF C 17-102 and say so on every sheet.

    Can you work from PDF drawings only?

    Yes. DWG lets us draw directly on your geometry and return editable files; with PDF we redraw the relevant plans first and note it in the design basis.

    Is the BOQ tied to LPES products?

    Every line carries an LPES part code so it can be priced immediately. The description states material, size and standard, so an approved equivalent can be compared line for line.

    Do you include the lightning risk assessment?

    Yes. The IEC 62305-2 assessment is the first deliverable, because it sets the protection level and the surge-protection requirement that the rest of the design follows.

    Can LPES install what it designs?

    Yes. The approved drawings carry straight into installation and commissioning, testing and the LPES Protection Passport, so one team stays accountable from design to handover.

    Start your design

    Send your drawings. Get a design basis and proposal back.

    Share plans, SLD and location. An LPES engineer reviews them and returns the scope, assumptions, deliverables and turnaround in writing.

    Send drawings for a proposalRun a free risk assessment
    Call080 4388 8915Emailinfo@lpesinternational.comWhatsAppChat with an engineerOfficesGurugram, India · Budapest, Europe
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