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Nomenclature

Walkway grating (WEMA grating): a structural element typically made of steel (carbon or stainless), consisting of a system of parallel load-bearing flat bars connected transversely by flat bars or cross rods through pressing or welding. It forms an openwork, durable walking surface. Walkway grating is an extremely versatile product used in industry, construction, logistics, and many other sectors wherever a strong, safe, and functional surface is needed.

Load-bearing flat bars: the main grating element responsible for carrying loads – must rest on the supporting structure.

Cross flat bars: flat bars or rods perpendicular to the load-bearing bars, forming the mesh grid.

Galvanized pressed grating KWO (pressed, KOP): gratings in which flat bars and cross rods are joined by a pressing process.

Galvanized welded grating (KOZ): gratings in which cross rods are joined by welding.

Galvanized staircase tread (STO, SOZ): gratings manufactured as stair treads, both welded and pressed.

Serrated anti-slip grating (S1, S2, S3): gratings with serrations on the surface of load-bearing bars (S1), cross bars (S3), or both load-bearing and cross bars (S2), enhancing grip and slip resistance.

Cutouts – holes, bevels, and other shapes cut into the gratings to adapt them to the project. We have two basic types:

  • SMALL – minor cutouts up to 0.5 m in length, fitting the grating around structural obstacles or facilitating installation, with minimal impact on load capacity.
  • LARGE – cutouts from 0.5 m in length, usually made to form irregular grating shapes, allow the passage of large elements, or enable the installation of hatch covers. They may affect load capacity.

Arched cutouts – round or partially round holes cut into gratings to fit around round obstacles (e.g. pipes). Two types:

  • SMALL – cutouts up to 0.5 m in length, fitting the grating around obstacles or facilitating installation, with negligible effect on load capacity;
  • LARGE – cutouts from 0.5 m in length, typically to create irregular shapes or pass large items. May affect load capacity.

Edge plate (“bortnica”) – a plate welded to the grating edge or cutout. It increases safety when walking on gratings, prevents objects from sliding off, and can protect pipes passing through the grating.

Anti-slip strip – a perforated angle bar installed along the grating edge, improving grip and preventing slips while walking. Commonly used on stair landings, stair treads, and inclined platforms (10–24° incline) along the full width, spaced at intervals matching an average step length (approx. 600 mm).

Angle iron – a steel angle section used, for example, as a frame for scraper gratings.

Panel welded into grating opening – a solution where one or more grating openings are covered or filled with a steel sheet containing a hole to assist installation.

Brackets – mounting elements that allow fast and secure fixing of the grating to the supporting structure. Typically, 4 brackets per grating are used. Types include:

  • Standard brackets – including clamp (G01), lower plate (D01); M8×70 screw (E01) and square nut M8 (E14).
  • Hook brackets – including clamp (G01), 9 mm rod hook bracket (D06), M8×70 (E01) or M8×100 (E02) screw.
  • Double brackets (for joining gratings) – including connector (D03), M8×70 screw (E01) and square nut M8 (E14).
  • Shot‑in brackets – including clamp and screw per project specification.
  • Screw‑in brackets – including washer plate and anchor per manufacturer catalog.

Hot-dip galvanizing – a durable, impermeable zinc coating applied to the grating flat bars. By immersing the element in molten zinc, it is protected against corrosion and mechanical damage for decades.

Grating support – the bearing height of the grating (not less than 30 mm).

Grating span – the external dimension of the grating, including the bearing length.

HOW TO ORDER:

CODE MESH SIZE LOAD BAR GRATING OUTER DIMENSIONS L × W QUANTITY
KOZ 33×33 30×3 L = 1500 × W = 1000 20

Symbols denoting grating types:

  • KWO – galvanized pressed grating
  • S1 KWO – pressed grating with serrated load-bearing bars
  • S2 KWO – pressed grating with serrations on both load-bearing and cross bars
  • S3 KWO – pressed grating with serrated cross bars
  • KW – black pressed grating
  • STO – galvanized pressed stair tread
  • KOZ – galvanized welded grating
  • SOZ – galvanized welded stair tread
  • V2A KW – stainless grating made of steel 1.4301
  • V4A KW – stainless grating made of steel 1.4404
  • S1 V2A KW – stainless pressed grating with serrated load-bearing bars
  • S2 V2A KW – stainless pressed grating with serrations on load-bearing and cross bars
  • S3 V2A KW – stainless pressed grating with serrated cross bars