Offshore Structural Engineering

Jacket Structures.
Subsea Mudmats.
Built Right.

Structure. Strength. Certainty.

Specialist engineering analysis for fixed jacket platforms and subsea mudmat foundations. End-to-end package delivery — from initial SACS model to final signed report.

10+
Years experience
12
Analysis types
6
Design codes
MSL SEABED H HELIPAD CRANE FLARE MAIN DECK CELLAR DECK L1 L2 L3 MUDMAT JACKET + TOPSIDE

Specialist Focus.
No Generalist Overhead.

Seaframe Engineering is an offshore structural engineering consultancy with a precise mandate: fixed jacket platforms and subsea mudmat foundations.

We partner with EPCs, independent consultancies, and owner-operators as a reliable overflow and specialist resource — bringing project-grade rigour without the overhead of permanent headcount.

Our engineers are industry practitioners. Every deliverable is grounded in real project experience, current design codes, and field-verified SACS and ANSYS workflows. We don't offer generic civil engineering — everything we do is specific to the offshore energy environment.

Based in Kerala, India. Available for international engagements across the Middle East, Southeast Asia, and beyond.

10+
Years of direct offshore structural engineering experience
SACS
& ANSYS
Industry-standard software platforms used on every project
12
Analysis types covered from routine checks to extreme events
6+
Design codes applied — API, ISO, DNV, NORSOK, BS and more

Two domains. Deep expertise.

We don't spread thin across all offshore disciplines. We own two specific domains — and we own them completely.

Specialisation 01

Fixed Jacket Structures

  • In-place analysis
    Static storm & operational loading with PSI foundation, member & joint UC checks per API RP2A / ISO 19902
  • Pre-service analysis
    Load-out, transportation, upending, and installation checks
  • Fatigue analysis
    Spectral wave fatigue, PSI foundation, SCF per DNV-RP-C203
  • Seismic & dynamic
    Response spectrum, pushover RSR extraction per ISO 19902
  • Nonlinear extreme event
    Collapse, ship impact, blast wall, dropped object
Specialisation 02

Subsea Mudmat Foundations

  • Global Analysis
  • Lifting with skew and CoG shift
    Single hook & tandem lifts, skew load factors, CoG envelope per DNV-ST-N001
  • Transportation analysis
    Sea-fastening design, vessel motion & acceleration response, barge deflection
  • In-place analysis
    Operational loading, bearing & sliding stability, settlement & tilt checks
  • Recovery analysis
    Breakout load estimation, lift rigging check, soil suction effects
  • Local Analysis
  • Padeye design
    Pin hole check, cheek plate sizing, main plate stress per DNV-ST-N001
  • Skirt buckling check
    Axial buckling, passive earth pressure, installation load capacity
  • Mudmat bearing check
    Combined V-H-M loading, eccentric & inclined loads, undrained & drained
  • Rigging design
    Sling sizing, shackle selection, spreader bar check per DNV-ST-N001

What we deliver

Every engagement is backed by end-to-end accountability — from initial scope review to final signed deliverable.

Structural Modelling

Build-from-scratch SACS models for new jacket designs and brownfield modifications. Full member sizing, joint classification, and load application per project specifications.

In-Place & Pre-Service Analysis

Static and dynamic analysis for storm and operational loading, pre-service configurations, load-out and transportation — with UC reporting per API RP2A and ISO 19902.

Nonlinear & Advanced Simulation

Pushover/collapse (RSR), ship impact, blast wall, and dropped object assessments using SACS Collapse Advanced. Full dynamic and nonlinear response capability.

Fatigue & Spectral Analysis

Spectral wave fatigue using DYNPAC and Wave Response modules. SCF calculation, S-N curve selection, Miner's rule accumulation and fatigue life per DNV-RP-C203.

Engineering Reports & Documentation

Client-ready calculation notes, basis of design, executive summaries, and final analysis reports — full input-to-result traceability with every deliverable.

End-to-End Package Delivery

Complete delivery from scope review and initial modelling through all analysis runs, QA, and final signed report — single point of accountability throughout.

12 analysis types. One team.

From routine in-place checks to extreme-event nonlinear simulation — covered end to end.

In-Place
Static storm & operational, member/joint UC
Fatigue
Spectral wave, PSI foundation, Miner's rule
Lifting
Single hook, tandem, spreader bar (DNV-ST-N001)
Load-Out
SPMT, skidded, ISO 19902 partial action factors
Transportation
Sea-fastening, vessel motion, acceleration
Seismic / Pushover
RSA, RSR extraction, CLPOPT/LDSEQ workflow
Ship Impact
Kinetic energy, DNV denting, static + dynamic
Blast Wall
Tributary area, Rayleigh damping, SACS CA
Dropped Object
Dynamic three-module IMPACT workflow
Mudmat Bearing
V-H-M loading, eccentric & inclined loads
Mudmat Sliding
On-bottom stability, current & wave loading
Soil-Structure
Foundation stiffness, PSI super elements

Software & Design Standards

Industry-standard platforms and internationally recognised design codes applied on every project.

Software Platforms

SACS (Bentley)
Primary structural analysis platform — in-place, fatigue, pile-soil interaction, dynamic
SACS Collapse Advanced
Nonlinear pushover, blast wall, ship impact, dropped object analysis
DYNPAC + Wave Response
Dynamic modal analysis and spectral wave fatigue workflow
SACS PSI Module
Pile-soil interaction using P-Y, T-Z, and Q-Z spring curves
ANSYS Mechanical
Finite element analysis for complex structural problems and detailed component checks

Design Codes & Standards

API RP2A WSD/LRFD
Fixed platform design — in-place, fatigue, pile capacity
APIWSDLRFD
ISO 19902
Fixed steel offshore structures — global reference standard
DNV-ST-N001
Marine operations — lifting, load-out, transportation assessments
DNV-RP-C203
Fatigue design of offshore steel structures, S-N curves
NORSOK N-004 & BS 7910
Steel structure design (NCS) and fracture mechanics / flaw assessment

Delivery Model

Structured process — consistent quality from kickoff to close-out on every engagement.

01

Scope Review

Client brief, design basis, code selection, and deliverable list agreed upfront before work begins.

02

SACS Modelling

Structural model built or reviewed from scratch to agreed project specification and client template.

03

Analysis Runs

All load cases, analyses, and post-processing completed per agreed scope and timeline.

04

QA & Review

Internal review against code requirements and client checklist before any issue of results.

05

Final Deliverable

Signed calculation note, model files, and executive summary issued in client-specified format.

Start a conversation.

Tell us about your project — scope, timeline, and the type of analysis needed. We'll respond within 24 hours with a clear picture of how we can help.