BESPOKE FABRICATION
Other Offshore Structures.
Aluminium alloy mudmats and bespoke offshore fabrication. Engineered for jacket installations, not converted from helideck stock. ⅓ the weight of timber, positive buoyancy, no deforestation in the supply chain." (orange on "Engineered for jacket installations
~40 kg/m²
TYPICAL MUDMAT WEIGHT
12 m
MAX SUPPLY LENGTH
Zero
WELDING ON INSTALL
+
BUOYANCY (NOT NEGATIVE)
WHY THIS EXISTS
The seabed isn't always strong enough. The mudmat shouldn't be the weak point.
When the seabed is too soft to support a jacket structure directly, mudmats spread the load. They sit between the jacket and the seafloor, distributing equipment weight across enough surface area that the structure doesn't sink, tilt or fail before it can be piled.
For decades, mudmats meant tropical hardwood timber. Heavy, environmentally destructive at source, and — counter-intuitively — engineering-problematic during installation because timber is less dense than water. As the jacket is lowered, negative buoyancy in the mudmats creates uplift forces at the bottom of the structure.
We engineer mudmats from marine-grade aluminium alloy. ⅓ the weight, positive buoyancy in water, weld-free assembly, and no rainforest in the supply chain.
THE PRODUCT
Extruded long lengths. Bolted, not welded.
Mudmats are extruded from marine-grade aluminium alloy in long lengths, typically 12m, supplied in 500mm-wide sections that join mechanically. No welding on installation. Securing to the steel jacket structure is via fasteners and U-bolts — the same modular, weld-free philosophy that runs through every product we build.
Weight is approximately 40 kg/m², roughly one-third the weight of an equivalent 100mm timber mudmat at 90 kg/m². Lower handling weight on the deck, smaller crane requirements during fabrication, lower shipping cost, and easier rigging during the jacket-lowering operation.
Aluminium is positively buoyant in seawater. Unlike timber mudmats — which create uplift at the bottom of the structure as the jacket is lowered — aluminium mudmats add weight to the structure during the descent, exactly when the engineering wants it.
40 kg/m²
ALUMINIUM
90 kg/m²
TIMBER (100mm)
+ buoyant
IN SEAWATER (NOT NEGATIVE)
WHY ALUMINIUM
Lighter, faster, and right way up in the water.
1. ⅓ the weight of timber
Lower handling, easier rigging, smaller cranage. The whole installation chain runs faster and cheaper from yard to seabed.
2. Positive buoyancy under load
Aluminium adds weight during the jacket descent. Timber lifts. The engineering case for aluminium isn't just material — it's basic physics during the most critical hour of the installation.
3. No welding on install
Long-length extrusions, mechanical joints, fasteners and U-bolts to the jacket. The same modular, weld-free build process that runs through every aluminium structure we make.
4. No tropical hardwood in the supply chain
Conventional timber mudmats use mature primary-forest hardwood, harvested with significant environmental cost. Marine-grade aluminium is fully recyclable at end of life. For operators reporting on environmental supply-chain metrics, this is a clean specification.
SPECIFICATIONS
Engineered to the standards your operators audit against.
Materials
Marine-grade aluminium alloy (6082-T6 or equivalent) · SS316 fasteners and U-bolts · Marine-grade casting alloys for joints and fittings
Dimensions
Lengths up to 12m · Width typically 500mm · Sections joined mechanically — no welding · Custom widths and profiles per project requirement
Performace
Approximately 40 kg/m² (vs. ~90 kg/m² for 100mm timber) · Positive buoyancy in seawater · Load capacity engineered to specific jacket and seabed conditions
Package Includes
Project-specific extrusion design · All fasteners, U-bolts and securing hardware · Mechanical joining hardware · Site supervision · Full documentation and as-built drawings
BESPOKE CAPABILITY
If it's marine, aluminium, and structural, talk to us.
We don't run a productised catalogue of every aluminium offshore structure imaginable. We run a Singapore yard, a design-and-build team, and four decades of marine aluminium experience.
Beyond mudmats, we've engineered antenna towers, structural transition joints, custom support frames, escape walkways, machinery platforms, road bridge decking, and bespoke topside structures across the offshore, drilling, FPSO and onshore portfolios we deliver.
For programmes that need an aluminium structural component outside our standard product range, the conversation starts with an engineering brief. The build comes from the same yard, the same engineers, and the same modular, weld-free fabrication logic that produces every helideck we ship.
Enquiries
Engineering an aluminium structure for offshore?
Mudmats for an upcoming jacket installation, or a bespoke aluminium structure outside our standard range, tell us what you're trying to engineer. We'll come back with a design approach and budgetary numbers within two working days.
