Press-locked grating T3A
T3A gratings are a type of press-locked grating (30x130 mesh, 40x3 bearer bar). Specifically designed for motorways and meets the GC77 specifications of the French Ministry of Equipment and Transport .
T3A gratings can be supplied fitted with spacing and connecting attachments on request.
Custom manufacture
JK Technic offers custom-made T3A gratings to suit your requirements (layout plan, size, etc.). This grating has 30x130 mesh and 40/3 bearing bars.
Our design office is on hand to deal with your technical requirements and layout plans, and will be able to advise you right through to the completion of your orders.
T3A grating is specially designed for motorways and complies with Ministry of Public Works GC77 specifications. T3B gratings are also available.
Depending on your needs and expectations, we also offer press-welded, FRP, rubber, full gratings, louvred and special gratings.
Characteristics
Mesh
- The mesh spacing is defined in accordance with the standards and loads that must be respected:
- For a BB thickness of 2-3 mm:
- The BB spacing is typically a multiple of 11.11.
- The IB spacing is typically a multiple of 11.11.
- For a BB thickness of 4-5 mm:
- The BB spacing is typically a multiple of 18.
- The IB spacing is typically a multiple of 17.
- Other options are available on request.
Bearer bar
- Standard height: 20-150 mm.
- Standard thickness: 2-8 mm.
- Other options are available on request.
Transvers bar
- Spacer: 10 x 2 mm.
- Other options are available on request.
Dimensions
- Maximum length of bearer bars: 4000 mm.
- Maximum length of spacers: 2000 mm.
Material
- S235JR steel as per EN 10025 standards..
- Stainless steel 304 ( 1.4301 ).
- Stainless steel 316 ( 1.4571 ).
- Aluminium AlMg3.
- Other options are available on request.
Surface treatment
- Galvanized in accordance with EN ISO 1461 standards.
- Lacquered in accordance with standard RAL.
- Passivation.
- Anodisation.
- Bituminous paint
- Other options are available on request.
Finish
- Available with 'T' or 'flat' edge.
- Available with single or double notching on request.
- HALF-MOON or SAWTOOTH notching available.
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
JK Technic press-locked grating is characterized by transverse, cross bars inserted under high pressure into pre-existing notches in the bearing bars. This grating is produced in “flat” or “T”-shaped sections, welded into place and then optionally undergoes hot-dip galvanizing in accordance with the applicable EN ISO 1461 standards. For situations with an increased risk of slipping, anti-slip grating can be produced, where the upper surface of the bearing bars and/or the transverse bars can be given anti-slip serrations. JK Technic press-locked grating 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 :
Press-locking
Step 3 :
Application of banding bars
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