CheckerPlate
Steel checker plate (chequer plate) — slip-resistant floor plate for walkways, platforms, trailers and covers.
Checker plate, also spelt chequer plate and called floor plate, tread plate or diamond plate, is hot-rolled steel plate with a raised pattern on one face that gives a slip-resistant surface. It is the standard material for industrial walkways, platforms, stair treads, mezzanine floors, trailer and ute floors, pit and trench covers. We supply steel checker plate sheets from 3 to 12 mm thick to AS/NZS 3678 Grade 250, in 2400 × 1200, 3000 × 1500 and 6000 × 1500 sheets. It comes black or hot-dip galvanised, in project and bulk quantities, and can be cut, folded and drilled to your drawings. Mill test certificates are provided for every heat.
Product Range
3 mm to 12 mm Thickness
Checker plate sheet from light 3 mm trailer-floor gauge to 12 mm plate for trench covers and heavy traffic.
AS/NZS 3678 Floorplate
Hot-rolled to AS/NZS 3678 Grade 250, the Australian standard for structural floorplate, with verified mechanical properties.
Black or Galvanised
Supplied black (oiled) for painting, or hot-dip galvanised to AS/NZS 4680 for outdoor walkways and wet areas.
Cut, Folded & Drilled
Checker plate sheets cut to size, folded into stair treads and kick plates, and drilled or slotted for fixing.
Fabricated Floors & Covers
Complete platform floors, pit lids and trench covers fabricated with stiffeners and lifting points to your drawings.
Checker Plate Sizes & Thicknesses
Steel checker plate (chequer floor plate) to AS/NZS 3678 Grade 250. Thickness is measured at the base, not over the raised pattern.
| Thickness (mm) | Standard sheet sizes (mm) | Typical use |
|---|---|---|
| 3.0 | 2400 × 1200, 3000 × 1500 | Trailer floors, toolbox lids, covers |
| 5.0 | 2400 × 1200, 3000 × 1500, 6000 × 1500 | Walkways, ute trays, step treads |
| 6.0 | 2400 × 1200, 3000 × 1500, 6000 × 1500 | Industrial platforms and mezzanines |
| 8.0 | 2400 × 1200, 3000 × 1500, 6000 × 1500 | Heavy-duty access and loading areas |
| 10.0 | 3000 × 1500, 6000 × 1500 | Pit covers and vehicle traffic |
| 12.0 | 3000 × 1500, 6000 × 1500 | Trench covers and heavy plant decks |
Additional sizes, grades, lengths and finishes available on request — contact us for a full size chart and quote.
Common Applications
- Industrial walkways and platforms
- Stair treads and landings
- Trailer, truck and ute tray floors
- Pit, trench and service covers
- Loading docks and ramps
- Mezzanine and plant-room floors
Relevant Standards
- AS/NZS 3678 — Structural steel (hot-rolled plates, floorplates and slabs)
- AS 1657 — Fixed platforms, walkways, stairways and ladders
- AS/NZS 4680 — Hot-dip galvanized (zinc) coatings on fabricated ferrous articles
- AS 4100 — Steel structures
Checker Plate — Frequently Asked Questions
Is it checker plate or chequer plate?
Both spellings are used in Australia for the same product. Steel checker plate, chequer plate, floor plate, tread plate and diamond plate all describe hot-rolled plate with a raised slip-resistant pattern, made to AS/NZS 3678.
What thickness of checker plate do I need?
3 mm suits trailer floors and covers, 5 to 6 mm suits pedestrian walkways and platforms, and 8 to 12 mm is used for vehicle traffic, pit covers and heavy plant. Span between supports matters as much as thickness, so check with your engineer for platforms.
What size sheets does checker plate come in?
Standard sheets are 2400 × 1200 mm and 3000 × 1500 mm, with 6000 × 1500 mm in 5 mm and thicker. We can cut sheets to size or supply them fabricated as treads and covers.
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