Louvred gratings
Louvred GEI gratings are used for façades to provide a visual screen, a brise-soleil effect or a privacy screen, as well as to form a wall that counteracts any impressions of emptiness.
Characteristics
Louvred GEI grating is manufactured according to a precise load table. The dimensions of the bearing bars (BB) are important because they determine the load bearing capacity of the grating.
Mesh centre distances
These are decided based on standards and load capacity. For louvred grating, mesh centre distances for the BB and TB are typically in multiples of 11.11. G.E.I has a range of louvred gratings with different mesh available:
- 100 x 30 - 60 x 30 - 30 x 30.
- Other options are available on request.
Bearing bars
Standard thickness: from 2 to 3 mm.
Height of BBs and TBs (in mm):
| Bearing bars | 25 | 30 | 35 | 40 | 50 | 60 |
| Transverse bars louvred at 45° |
35 | 40 | 50 | 55 | 70 | 85 |
Dimensions
Maximum dimensions: 2,500 x 2,000 mm.
For optimal grating quality, we advise you not to exceed a height/length ratio of 1.5 m2.
Materials
S235JR steel as per EN 10025 standards.
304 (1.4301) or 316Ti (1.4571) stainless steel.
AlMg3 aluminium.
Fastening systems
Fastening systems are manufactured from galvanised steel for steel gratings and from stainless steel for stainless steel and aluminium gratings. In certain cases, gratings may be fixed to structures with welded brackets.
Finished products
Finishes without banding bars
Finishes with banding bars
Direction and angle
Assembly
Method of manufacture
GEI louvred grating is characterized by transverse bars inserted at 45° into the bearing bars (please check with us for any other angle). It can then be produced in “flat” sections, welded at right angles to the bearing bars. The grating then optionally undergoes hot-dip galvanizing in accordance with the applicable EN ISO 1461 standards. GEI louvred grating is typically manufactured from EN 10025 standard S235JR steel which ensures a consistent production quality.
Custom manufacture
GEI can manufacture made-to-measure slanted-strut 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.
Aeras of application
- Sun screens
- Decorative
- Ventilation systems
- Flooring
- Roofing
Technical infos
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)
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.)
BEARING BARS (BB)
Straight rods bearing the weight and arranged in rows at right angles to the transverse bars and supports.
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.
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.
SUPPORT BRAKET
Bracket welded to the ends of the grating rendering it suitable for certain uses (for example: shelving, guttering).
Material
STEEL
STAINLESS STEEL
ALUMINIUM
FRP
RUBBER
Finishes
"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
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.
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.
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
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