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Knowledge Base · Offshore

Offshore topside as-built scanning

3D Engineering — engineering teamLast reviewed: July 2026~6 min read

Offshore topside scanning captures the structural steel, piping and equipment of a platform's topsides as a survey-grade point cloud — an accurate as-built basis for modifications, integrity work and decommissioning planning, gathered without disrupting operations.

Why topsides need accurate as-built data

Platform topsides accumulate structural and piping modifications over decades of operation, in an environment where drawings are especially likely to fall out of date. Planning a modification, life extension assessment or tie-in against the original design drawings, rather than the platform as it stands, risks clashes and rework in one of the most expensive environments to fix them in.

Structural steel & deck Piping & process equipment Substructure & jacket interface Topsides captured as one registered point cloud
Structural, piping and equipment levels of the topside are captured together and registered into one coordinate system.

What we deliver

  • Topside & platform laser scanning — structural, piping and equipment
  • Registered point cloud — millimetre-grade, QA'd to survey tolerances
  • As-built 3D/BIM of topsides at your required LOD
  • Structural & piping as-built — clash-free basis for modifications
  • Integrity & dimensional data — supporting structural assessment
  • Decommissioning data and digital twin foundation

See Offshore for the full service scope, and our note on as-built scanning for turnarounds for the onshore equivalent workflow.

Data for decommissioning planning

Decommissioning planning benefits from the same accurate as-built record — knowing the actual mass, layout and structural connections of the topside supports severance planning, lift engineering and removal sequencing, rather than relying on drawings that may not reflect decades of modification.

Working offshore: access and logistics

Offshore capture is planned around platform access, helicopter or vessel logistics, permits and safety procedures specific to the operator and installation. We combine terrestrial and mobile scanning to cover topsides efficiently within the access windows available. See 3D laser scanning for the full capture toolkit.

FAQ

Can you scan a topside while the platform is operational?

Yes — capture is planned around your access windows, permits and safety procedures to minimise disruption to operations.

Does the scan cover both structure and piping?

Yes — structural steel, piping and equipment are captured together and registered into a single coordinate system.

Is this data useful for decommissioning?

Yes — an accurate as-built record supports severance planning, lift engineering and removal sequencing.

How do you handle offshore logistics and access?

We plan capture around your platform's access windows, transport logistics and safety procedures on a project-by-project basis.

Planning a topside modification or integrity project?

Talk to our engineering team about your platform — a technical discussion, no sales calls.

Request a technical consultation