Detailed Design & Drafting

Many developments we are involved in progress to detailed design, drafting and construction management after we have completed the concept and FEED stages.

GPA provides detailed design across the following disciplines:

  • Mechanical
  • Civil/Structural
  • Instrumentation
  • Electrical, HV, LV, ELV
  • Automation and SCADA
  • Process

Our team of design drafters specialises in using 3D CAD for mechanical/piping, electrical/instrument and civil/structural drafting. GPA also makes extensive use of laser cloud scan and survey data of existing brownfield sites to enhance the accuracy and efficiency of complex 3D drafting/modelling.

GPA develops design packages including fabrication and installation scopes of works, work packs and specifications, supported by detailed construction drawings, piping plans, isometrics, BOMs, detailed E&I and control system drawings, civil and structural detailed drawings.


  • Design, modelling & analysis of structural systems (from foundations to main structures), including concrete, steel, timber & FRP structures and elements
  • Civil & structural condition assessment & reporting
  • Onsite audits & analysis of existing structures, with extensive experience in maintenance & structural recovery programs of existing structures & facilities
  • Specialist structural & civil consultancy services
  • Lifting devices inspection and evaluation, including crane evaluation, lifting studies & planning
  • Constructability reviews
  • Construction support
  • Dilapidation assessment & reports
  • Pre-demolition inspection & guidance
  • General civil & structural design & drafting.


  • 3D CAD Design
  • PV Elite pressure vessel design
  • CAESAR stress analysis
  • HYSYS process modelling (steady state and transient)
  • PETROSIM Steady-State Multiphase Flow Simulator
  • FLOW TRAN Pipeline Network Steady State & Transient Flow Modelling
  • SYSCAD modelling
  • PIPE2000 pump and water flow modelling
  • PHAST plume analysis
  • Strand7 (FEA)
  • PV Elite pressure vessel design
  • Pipestrain
  • Microstran
  • Limcon
  • Structural Toolkit
  • AutoCAD
  • SolidWorks
  • CADWorx
  • MicroStation