PAIRAHAN DESIGNCONSULTANTS
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What We Do

Services & Disciplines

Our Expertise

9 Core Engineering Disciplines

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We strategically plan and creatively implement the vision of ambitious organizations by designing spaces or facilities that are aesthetically compelling, ergonomic & process efficient, complying to their budgets & timelines.

  • Master Plan or Concept Plan Preparation
  • External & Internal 3D Walkthrough
  • Site Visit or Technical Compliance
  • Finishing Materials & Schedules
  • 3D Visualization and Technical Compliance
  • Detail Drawing of Plans, Elevations, Sections
  • Statutory Approval Drawings and Documentation
  • Building Massing & 3D Visualization
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Comparative Statement and Tender bid Analysis. Commercial Negotiation, Recommendations of Vendors. Checking of Construction Drawings, Issue of GFC Drawings on Site.

  • Tender Documents Preparation
  • QA/QC Documentation
  • Cash Flows Preparation for the Project
  • Checking Bills and Payment Certifications
  • Co-ordination of Architectural Drawings & Engineering Services
  • Geotechnical Topographical Analysis of the Site
  • Bill of Quantities, Estimation & Budgetary Cost
  • Material Takeoff Enquiry Floating
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Structural Analysis of the building/structures for different loading conditions/design projects — defining the design preambles with full QA/QC oversight.

  • Structural Analysis for various loading conditions
  • Preparation & checking of construction drawings
  • Site Visits, QA/QC Documentation & Structural Auditing
  • Pre-Engineering Building Analysis, Designs, Validation
  • Detail Specification for functional loading conditions
  • Peer Review & approval of GA drawings of the PEB
  • Material inspection at fabrication facility before dispatch
  • On-site inspection of erected structure — torque, leakages, alignments
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Electrical system concept layout of the entire project on client's feedback. SLD for distribution network. Designing the illumination level based on the process/services requirements.

  • Electrical system concept layout & SLD for distribution network
  • Illumination level design based on process requirements
  • Specifications for electrical equipments
  • Bill of quantities, Technical specification tender enquiries
  • GA Drawing approval for equipments
  • Inspection of equipments at vendor's facilities
  • Site Visits, QA/QC Documentations
  • Statutory approvals assistance
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Comprehensive mechanical utilities design including compressors, cooling towers, gas lines and full process piping network from concept to commissioning.

  • List of equipments — compressor, cooling towers, gas systems
  • Process flow diagram based on the process requirement
  • Specifications for mechanical equipments
  • SLD for process network, bill of quantities, tender enquiries
  • Evaluation of bidders, recommendation & LoI/P.O. assistance
  • Validations of equipment drawings
  • Inspection of equipment at vendor's facility
  • Site Visits, bill of quantities & payment certificate — HSD area
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Zoning diagram on the client's feedback and System Design on functional requirements. Specifications for HVAC system and equipment. Complete BMS integration and QC documentation.

  • Zoning Diagram & System Design on functional requirements
  • HVAC system and equipment specifications
  • Bill of Quantities & Recommendation of Bidders
  • Evaluation of Bidders & LoI/P.O. assistance
  • Drawings Validations for equipment inspection
  • Site Visits & Checking of bill of quantities
  • Payment certificate & BMS System integration
  • QC / QC Documentations
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System Design based on the provisions of National Building Code – Part IV, National Fire Protection Act or as per FM global standards. Full hazard category analysis.

  • Analysis of Hazard category of the project
  • NBC / FM Global standards compliant system design
  • Fire Alarm & Smoke Detector system design
  • Drawing Preparations & specifications for fire & safety systems
  • Bill of quantities, tender enquiries, evaluation of bidders
  • Recommendation & LoI/P.O. assistance to the vendor
  • Validations of equipment drawings & inspection
  • Statutory approvals assistance
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Complete plumbing layout for domestic and process requirements. Flow charts for water supply and sewage/effluent flow lines. STP ETP Design and process execution.

  • Plumbing layout for Domestic/Process requirements
  • Flow chart for water supply & sewage/effluent flow lines
  • Designing water supply system based on topography
  • STP ETP Design & process Execution Drawings
  • Gravitational flow or hydro pneumatic flow system
  • Proposals for sanitary fittings, fixtures and QA/QC
  • Rain Water Harvesting system Design
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Better known established collaboration process in the construction industry particularly for Industrial projects due to large number of services. Geometric precision, clash detection, total project visibility.

  • Geometrical precision in the drawings
  • Clash detection — service conflicts resolved before construction begins
  • All components viewable in totality or isolation in the model
  • Faster approvals and better client communication
  • Significantly reduced rework and on-site surprises

Project Management Consultancy — 10 Stages

01 · Project Initiation
06 · Procurement
02 · Pre-Construction Planning
07 · Project Controls
03 · Scheduling
08 · Constructability Review
04 · Project Execution Plan
09 · Project Closing
05 · Construction Supervision
10 · EHS Practice
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We develop and maintain robust project schedules that align design, procurement and construction activities — giving stakeholders complete visibility into critical path, resource loading and milestone performance from kickoff to handover.

  • Master Schedule Development (Primavera P6 / MS Project)
  • Work Breakdown Structure (WBS) Preparation
  • Resource & Manpower Loading Plans
  • Critical Path Method (CPM) Analysis
  • Milestone & Progress S-Curve Tracking
  • Delay Analysis & Time Impact Assessment
  • Look-Ahead Scheduling (Weekly/Monthly)
  • Schedule Risk Assessment & Mitigation Planning
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