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Oil & gas · Upstream & offshore

Topside Module Frames

Equipment-housing module frames built in sections: plate-girder decks, tubular columns and bracing, deck plate and grating, lifting padeyes, stairs and handrails, fabricated to the client’s design.

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Allmarc 3D model · to scale
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How it is built.

Scroll: the camera moves to each part in turn and ends on the exploded view. Drag to turn it round yourself.

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01 / 08

A module frame

3 decks round the client’s packages. Big structures leave our works for the USA, Louisiana included, so size and export packing are familiar ground. The design is the client’s.

Scroll to see how it is built · drag to turn it round

02 / 08

Plate-girder decks

Girders built up from plate and welded full penetration on the submerged-arc line.

How is it possible at Allmarc?

Used here for: Plate-girder decks

  • Plates matched and tack-welded
  • Automatic feed and stitch welding
  • H and I sections built from plate
All our machinery

Used here for: Plate-girder decks

  • Full-penetration welds on built-up sections
All our machinery
Hydraulic H-beam straightening in the Allmarc works

Used here for: Plate-girder decks

  • Straightens built-up beams after welding
All our machinery

03 / 08

Tubular columns

Columns rolled from plate.

How is it possible at Allmarc?
Three-roll pinch cum pyramid plate rolls in the Allmarc works

Used here for: Tubular columns

  • Rolls plate up to 40 mm
All our machinery

04 / 08

Bracing on every face

Tubular diagonals profile-cut to fit each node, so the module lifts as one stiff box.

How is it possible at Allmarc?
CNC profile laser in the Allmarc works

Used here for: Bracing on every face

  • Tube, beam and structural profile cutting
All our machinery
Manual MIG welding in the Allmarc works

Used here for: Bracing on every face

  • Qualified welders, including 6G
All our machinery

05 / 08

Decks

Plated main and upper decks, grated mezzanine.

06 / 08

Padeyes

Padeyes at the corners for the lift, cut from thick plate.

How is it possible at Allmarc?

Used here for: Padeyes

In 2024 we were the only buyer of Deratech’s 20 kW, 12 m laser.

  • 20 kW
  • 12 x 3 m bed
  • Pallet changer
All our machinery

07 / 08

Access

Stairs between decks and handrails round the open edges; the packages are the client’s.

08 / 08

A kit of parts

Girders, columns, bracing, decks and padeyes: every member numbered, match-marked and packed in erection sequence.

Why Allmarc

Experience you can trust.

We fabricate to your drawings and prove the fit in our own bay before anything ships. Open any line for the detail.

Talk to an engineer
Structural steel at scale
  • 4 plants at Kanbha; about 6,000 T a month from November 2026.
  • Plate, sections and built-up members in house.
Trial-assembled
  • Fit-up proven in the works.
  • Match-marked for bolt-up on site.
Finished before dispatch
  • Blast, prime and paint in house; galvanised finishes on request.
  • Access steel fitted in the works.
Packed for the journey
  • Export packing we designed ourselves.
  • Shipped as numbered kits.
Start a project

Have a drawing? Let us build it.

We fabricate to your design, from plate to a packed container. An engineer will tell you honestly how we would build it.

Send us a drawing