Press-welded gratings T3B
T3B gratings are press-welded gratings (30x100 mesh, 40x3 bearer bars) specifically designed for motorways and meet the GC77 specifications of the French Ministry of Equipment and Transport.
Custom manufacture:
GEI can manufacture made-to-measure T3B gratings to meet your requirements (layout, size, etc.).
Our research department is available to handle your technical requirements and your intended layouts, and can advise you on issues up to and including the realisation of your orders.
We can also offer T3A gratings on request.
Gratings for industrial floors and floorings are also available as press-locked gratings, safety grids and fiberglass gratings.
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
- Other options are available on request.
Material
- S235JR steel as per EN 10025 standards.
Surface Treatment
- Galvanized 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:
BBs and TBs fixed in place
STEP 2:
Electrowelding
