jktechnic@jktechnic.fr +33 3 87 98 88 76

Press-welded gratings

JK Technic press-welded gratings are manufactured by using electrofusion to attach cross-bars in a twisted square configuration to bearer bars. They are manufactures using techniques that guarantee a constant production quality (manufacture according to RAL GZ638) and are typically made from S235JR steel. The ensemble can be hot-galvanised in accordance with EN ISO 1461 standards. It is mainly used in the manufacture of industrial walkways and staircase steps.

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

Areas of application

Industry

  • Thermal, hydro-electric, nuclear and solar power stations
  • Chemical and oil industries
  • Automotive and steel industry
  • Shipbuilding
  • Cement works
  • Transformation and metallic construction
  • Railings and fencing
  • Emergency stairs
  • Railway and transportation industries
  • Drains and ventilation systems

Architecture

  • Decorative
  • Sun shading
  • Fencing
  • Cladding
  • Urban furniture
  • Gangway
  • Multisports grounds

Technical infos

Structures

 

Portée du caillebotis

MESH

Spacing between bearing bars (BB) and transverse bars (TB). Mesh created in this way has two characteristics: mesh width and mesh centre spacing (pitch).

  • Mesh width: the width of the opening that is between the BBs and TBs
  • Mesh centre spacing (pitch): the distance between the centre of BBs and TBs (for example, the distance between the centre of one bearing bar and the centre of the nearest adjacent bearing bar)

Portée du caillebotis

MESCH GROUP/TYPE 

 Mesh is made up of two values (in mm), where the first dimension is the distance between adjacent bearing bars, and the second dimension being the distance between adjacent transverse bars (for example: 33.33 x 33.33; 33.33 x 11.11; 55.55 x 55.55; etc.).

For convenience’s sake, the term “mesh gauge” is more frequently used (for example: 30 x 30 - 30 x 10 - 50 x 50 - etc.)

Portée du caillebotis

BEARING BARS (BB)

Straight rods bearing the weight and arranged in rows at right angles to the transverse bars and supports. 

Portée du caillebotis

TRANSVERS BARS OR CROSS BARS (TB)

Arranged at right angles to the bearing bars, and bonded to the bearing bars by the exertion of high pressure (press-locked grating) or by electrowelding (press-welded grating). The transverse bars are manufactured respectively in “straight metal” or as square, twisted bars.

Portée du caillebotis

BB AND TB GAUGE

 this is defined by two values (in mm), where the first corresponds to their height and the second to their thickness. Gauge examples: 30 / 2; 30 / 3; 40 / 3; etc...

Portée du caillebotis

RANGE

Gap between the supports on which the ends of the bearing bars rest.

Portée du caillebotis

IMPERMEABILITY - SECURITY BARS

security mesh uses the following mesh gauge: 30 x 19; 19 x 30; 19 x 19; etc. It is recommended for industrial environments (14122 standard) and allows nothing exceeding a 20 mm diameter ball to pass through it.

Portée du caillebotis

SUPPORT BRAKET

Bracket welded to the ends of the grating rendering it suitable for certain uses (for example: shelving, guttering).

Material

 

Portée du caillebotis

STEEL

Portée du caillebotis

STAINLESS STEEL

Portée du caillebotis

ALUMINIUM

Portée du caillebotis

FRP

Portée du caillebotis

RUBBER

Finishes

 

Portée du caillebotis

"T" BANDING BAR

 Bar which forms the outer frame of the panels.

Portée du caillebotis

"FLAT" BANDING BAR

 Bar which forms the outer frame of the panels.

Portée du caillebotis

TOE PLATE

Straight metal welded onto the end of the grating

Portée du caillebotis

RAISED BORDER

Straight metal welded onto the end of the grating

Serration

 

Portée du caillebotis

SIMPLE ANTI-SLIP SERRATION ON BB

Various types of serration can be applied to bearing and/or transverse bars. Please note that this double serration option (for BBs as well as TBs) is only applicable to press-locked grating. Serration can only be applied to bearing bars for press-welded grating.

Portée du caillebotis

SIMPLE ANTI-SLIP SERRATION ON TB

Various types of serration can be applied to bearing and/or transverse bars. Please note that this double serration option (for BBs as well as TBs) is only applicable to press-locked grating. Serration can only be applied to bearing bars for press-welded grating.

Portée du caillebotis

DOUBLE ANTI-SLIP SERRATION ON BB AND TB

Various types of serration can be applied to bearing and/or transverse bars. Please note that this double serration option (for BBs as well as TBs) is only applicable to press-locked grating. Serration can only be applied to bearing bars for press-welded grating.

 

Specific applied standards

 

ISO 14122 : Permanent means of access to machines and industrial plants

ISO 14122-2 : Working platforms and walkways

ISO 14122-3 : Stairs, ladders and handrails

RAL-GZ 638 : Manufacturing tolerances for gratings

RAL-GZ 639 : Manufacturing tolerances for safety grids

EN ISO 1461 : Galvanisation requirements

P98-350 : Integration of disadvantaged people

EN 10025 : Steel standard

image-description

20 000 customers in Europe, many references.

Browse our gallery of references in industry and architecture.

Discover our gallery
New ! Follow the progress of your order in a few clicks. Check your delivery