Press-Locked Gratings
A lot of possibilities of use and variety
GEI press-locked gratings are composed of flat cold-laminated insert bars pressed into existing notches in bearing bars. They are manufactures using techniques that guarantee a constant production quality (manufacture according to RAL GZ638) and are typically made from S235JR steel. Commonly used for manufacturing technical walkways and staircase steps, it is also used for aesthetic elements such as sun-breaker and privacy screens, as well as in construction for sections of façades, fencing and solid balustrades.
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.
Transverse bars louvred
- Standard height: 10mm
- 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 ).
- AlMg3 aluminium.
- Corten.
Surface Treatment
- Galvanized in accordance with EN ISO 1461 standards.
- Lacquered.
- Lacquered in accordance with standard RAL.
- Anodised.
- 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.
Load tables
GEI 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. GEI 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
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
- Heavy load bearing
Architecture
- Decoration
- Sun shadings
- Cladding
- Suspended ceilings
- Fencing
- Fencing
- Urban furniture
- Gangway
- Multisports grounds
Structures
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
Mesh 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.)
Bearing bars (BB)
Straight rods bearing the weight and arranged in rows at right angles to the transverse bars and supports.
Transverse bars louvred
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.
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...
Range
Gap between the supports on which the ends of the bearing bars rest.
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.
Angle support
Bracket welded to the ends of the grating rendering it suitable for certain uses (for example: shelving, guttering).
Material
Steel
Stainless steel
Aluminium
Finish
"T" banding bar
Bar which forms the outer frame of the panels.
"Flat" banding bar
Bar which forms the outer frame of the panels.
Toe plate
Straight metal welded onto the end of the grating
Raised border
Straight metal welded onto the end of the grating
Serration
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.
Simple anti-slip serration on TB
Simple anti-slip serration on BB
Double anti-slip serration on BB and TB
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
EN 10025 : Steel standard
