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Press-welded offshore gratings

Press-welded offshore gratings are specifically designed for oil rigs.

Benefits

The benefits of offshore gratings:

  • Notched bearer bars for added stability
  • Security : security mesh (19x19 19x40...) available that retains bearings of 20mm
  • Quick to assemble with laps of up to 6 metres in length
  • Durable, with bearer bars 5mm in thickness

Custom manufacture :

GEI can manufacture made-to-measure offshore gratings to meet your requirements (layout, size, etc.).

Our research department is available to handle your technical requirements, and can advise you on issues up to and including the realisation of your orders.

Characteristics

Mesh

The mesh spacing is defined in accordance with the standards and loads that must be respected:

  • Standard meshes: 30x30, 30x44, etc...
  • Standard security meshes: 19x19, 19x40, 30x19, etc...
  • EDF mesh: 30x27.
  • Other options are available on request.

Bearer bar

  • Standard height: 25-60 mm.
  • Standard thickness: 2-5 mm.
  • Other options are available on request.

Cross bar

  • Twisted square: 4-6 mm.
  • Smooth rounded configuration available on request.

Dimensions

  • Maximum length of bearer bars: 6100 mm..
  • Maximum length of twisted squares:   1000 mm, or greater on request.

Material

  • S235JR steel as per EN 10025 standards.
  • This product may be ordered in stainless steel depending on the quantities required.
  • Other options are available on request.

Surface treatment

  • Galvanised in accordance with EN ISO 1461 standards.
  • Lacquered in accordance with standard RAL.
  • Bituminous paint.
  • Other options are available on request.

Finish

  • The bearer bar may be notched on request.

Finished product

  • Custom manufacture based on the dimensions given by the customer or on plans drawn up by our research department.
  • Plain or galvanised ½ laps, panels and staircase steps can be easily assembled on site.

Assembly

Press-welded grating is obtained by electrical welded transverse bars, which are usually square and twisted (but can be round and straight) into the bearing bars. The grating is produced with “flat” banding, and then optionally undergoes hot-dip galvanizing in accordance with the applicable EN ISO 1461 standards. For an optimised anti-slip surface, it is possible to produce serrated press-welded grating, with serration on the bearing bars only. It is typically manufactured from EN 10025 standard S235JR steel which ensures a consistent production quality. RAL-GZ 638 manufacturing tolerances applied.

 

Step 1 :

Put in place the transverse bars and the bearing bars for electrowelding

Assemblage caillebotis

Step 2 :

Electrowelding

Assemblage caillebotis

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