| 1 | Standard Welded Steel Grating | Carbon steel, commonly Q235B or Q355B | Bearing bars such as 25 × 3 mm or 30 × 3 mm; common bearing-bar spacing includes 30 or 40 mm | Resistance-welded cross bars and bearing bars | Hot-dip galvanized after fabrication or industrial paint | Factory walkways, service platforms, pipe racks, ventilation areas, and maintenance floors | YB/T 4001.1; EN ISO 14122-2; project structural-load calculations |
| 2 | Serrated Welded Steel Grating | Carbon steel, commonly Q235B or Q355B | Common bearing-bar heights of approximately 25–50 mm with serrated top surfaces | Resistance welding followed by serration of the bearing-bar surface | Hot-dip galvanized, painted, or untreated for temporary indoor use | Wet walkways, water-treatment plants, outdoor platforms, ramps, and areas requiring enhanced slip resistance | YB/T 4001.1; EN ISO 14122-2; site-specific slip and load requirements |
| 3 | Heavy-Duty Welded Grating | Structural carbon steel, often Q355B or an equivalent grade | Typical bearing bars may be 50 × 5 mm or larger; spacing is selected for the design load | Heavy-duty resistance welding with reinforced bearing bars | Hot-dip galvanized or protective coating system | Heavy equipment areas, industrial loading zones, access roads, drainage channels, and vehicle-rated covers when engineered | YB/T 4001.1; EN 1993 for steel design where applicable; engineered vehicle-load criteria |
| 4 | Press-Locked Steel Grating | Carbon steel or stainless steel | Common bearing-bar depths of 25–50 mm with cross bars mechanically pressed into pre-punched slots | Cross bars are pressed into slots in the bearing bars | Hot-dip galvanized, painted, stainless pickled, or passivated | Architectural floors, ceiling panels, machine guards, platforms, and applications requiring a clean appearance | EN ISO 14122-2; applicable material and coating specifications |
| 5 | Swage-Locked Aluminum Grating | Aluminum alloy such as 6061-T6 or an equivalent structural aluminum grade | Common bearing-bar depths of 25–50 mm with tubular or rectangular cross bars | Cross bars are mechanically swaged into bearing bars | Mill finish, anodized, or powder coated | Corrosive environments, marine facilities, light industrial platforms, roof access, and areas requiring low weight | EN 1999 for aluminum design where applicable; EN ISO 14122-2; project load calculations |
| 6 | Stainless Steel Welded Grating | Stainless steel grades 304 or 316/316L | Common bearing bars include 25 × 3 mm and 30 × 3 mm, selected according to span and load | Resistance-welded construction | Pickled and passivated, electropolished, or mechanically finished | Food-processing plants, pharmaceutical facilities, chemical plants, wastewater treatment, and coastal areas | EN ISO 14122-2; applicable stainless-steel material specifications; hygienic-design requirements where relevant |
| 7 | Pultruded FRP Structural Grating | Glass-fiber-reinforced polymer with polyester, vinyl ester, or phenolic resin | Common panel depths include approximately 25, 38, and 50 mm; mesh openings are selected for access and load needs | Pultruded load-bearing profiles assembled into grating panels | Integral resin surface, grit-top, or concave anti-slip surface | Wastewater plants, chemical facilities, offshore platforms, cooling towers, and electrically sensitive areas | EN ISO 14122-2; manufacturer structural test data; project FRP fire, chemical, and load requirements |
| 8 | Molded FRP Grating | Fiberglass-reinforced polyester or vinyl ester resin | Typical panel depths range from about 25–50 mm with square or rectangular molded openings | Resin and continuous glass reinforcement are molded into an integral panel | Meniscus surface, grit-top surface, or molded anti-slip finish | Corrosive platforms, trench covers, walkways, ship decks, and water-treatment facilities | EN ISO 14122-2; ASTM fire and structural tests where specified; project chemical-resistance requirements |
| 9 | Steel Trench Drain Grating | Carbon steel, ductile iron, stainless steel, or aluminum depending on the installation environment | Panel width and bearing-bar spacing are matched to the trench opening and required load class | Welded, press-locked, cast, or fabricated construction | Hot-dip galvanized, painted, stainless finish, or corrosion-resistant coating | Floor drains, roadway channels, factory floors, parking areas, utility corridors, and process drainage systems | EN 1433 for drainage channels where applicable; YB/T 4001.1 for steel bar grating; project load class |
| 10 | Grating Stair Treads | Carbon steel, stainless steel, aluminum, or FRP | Common tread widths are approximately 200–300 mm; bearing-bar depth and span depend on stair design | Fabricated grating panel with nosing, end plates, and fixing holes | Galvanized, painted, serrated, abrasive nosing, or molded anti-slip finish | Industrial stairways, emergency exits, plant access stairs, platforms, towers, and maintenance structures | EN ISO 14122-3; OSHA requirements where applicable; local stair geometry and load regulations |
