Jackets, Legs & Braces

01 / 07

A four-legged jacket

Jackets are not our product; fabricating tubular steel at this size is our trade. We already ship big structures to the USA, including Louisiana. The design is the client’s.

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

02 / 07

Rolled legs

Leg cans rolled from plate and welded seam by seam.

How is it possible at Allmarc?

Three-roll pinch cum pyramid plate rollsRolls plate up to 40 mm

Used here for: Rolled legs

• Rolls plate up to 40 mm

All our machinery

Submerged-arc (SAW) welding lineFull-penetration welds on built-up sections

Used here for: Rolled legs

• Full-penetration welds on built-up sections

All our machinery

03 / 07

Frames and node cans

Plan frames at each elevation; heavier cans where the braces meet the legs.

04 / 07

X-braces

Brace ends profile-cut to the saddle shape of the can they land on, so fit-up is right before welding starts.

How is it possible at Allmarc?

CNC profile laserTube, beam and structural profile cutting

Used here for: X-braces

• Tube, beam and structural profile cutting

All our machinery

Manual MIG weldingQualified welders, including 6G

Used here for: X-braces

• Qualified welders, including 6G

All our machinery

05 / 07

Mudmats and pile sleeves

Mudmats and pile sleeves at the base.

06 / 07

Appurtenances

Conductor guide frames at every level, a boat landing and a riser.

07 / 07

A kit of parts

Legs, frames, braces and appurtenances: every member numbered, match-marked and packed in erection sequence.