Factory-direct steel gratings & stair treads, shipped worldwide
Metal Grid Floor
Steel grid floor for platforms, walkways and floors, made to order.
Itemized quote within 24 hours · Free drawing review included
Open-grid drainage
Water and spills fall straight through the panel
Certified & tested
Reports on request, MTC with every order
Samples in 5–7 days
Production in 15–25 working days
FOB Tianjin
Shipped worldwide, EXW / CIF negotiable
Wet-floor comparison
Open Grid, Close Mesh or Solid Plate
A grid floor only earns its place where water is present. Here is how an open metal grid floor compares with close-mesh and solid steel grid flooring alternatives before you commit to a build — with an honest note on where each one belongs.
| Dimension | Open-Grid Grid Floor | Press-Locked Close Mesh | Solid Chequer Plate |
|---|---|---|---|
| Water handling | Falls straight through the open grid into the drainage below | Drains through, slower across fine 11 / 11 mm apertures | Stays on the surface — needs falls, slopes and gullies |
| Slip behavior when wet | Bare bearing bars stay clean underfoot; serrated option bites into wet soles | Many small edges; less room for deep serrations | Tread pattern holds soap film in washdown zones |
| Debris and solids | 30 / 40 / 60 mm centers pass small debris; heel-proof spacing available | 11 / 11 mm keeps small parts and heels on the surface | Nothing passes — floor must be swept or hosed clean |
| Corrosion options | Q235B + HDG (ASTM A123 / ISO 1461), or SS304 / SS316 solid stainless | Same material range on the press-locked line | Plate form limits finish and edge protection choices |
| Steel in the floor | Steel only where the load path needs it — the lightest wet floor | More bars for the same span, denser walking surface | Full solid section — heaviest floor for the same coverage |
| Typical plant duty | Wet process floors, washdown platforms, drainage covers | Pedestrian zones, heel traffic, facade panels | Dry walkways and ramps with a chequer appearance |
Not sure which build fits your wet area? Send your drawings — we will spec it inside the 24-hour quote.
How a grid floor is built
Bars, Serrations and the Finish
1 · Open bar grid
Bearing bars carry the load, spaced at 30 / 40 / 60 mm centers, with cross bars locked at every intersection. The open grid is the drainage: process water leaves the walking surface the moment it lands.
2 · Serration option
The anti-slip choice: the bearing bar top edge is notched into serrations that grip wet and greasy soles. Specify serrated grid floor for washdown zones, plain bars where the floor stays dry and clean.
3 · Finish for the environment
Q235B panels go out hot-dip galvanized to ASTM A123 / ISO 1461 for general wet duty. For food, chemical and marine washdown, the whole grid is SS304 or SS316 stainless — no coating to wear through.
Why specify a grid floor
Why Maintenance Teams Specify a Steel Grid Floor
Heavy-duty grid floor ratings
Bearing bars from 20×3 mm to 100×8 mm take everything from foot traffic to pallet trucks. State the load and span — load tables are available on request with your quote.
Anti-slip under washdown
Serrated bearing bars keep grip when hosed floors are wet and soaped. Where small items must not drop through, closer centers and press-locked 11 / 11 mm mesh keep the surface heel-proof.
Factory-direct, made to order
Custom grid floor panels cut and banded to your drawings, sampled in 5–7 days, with FOB Tianjin pricing itemized in your 24-hour quote. Small trial orders welcome.
Applications
Where Metal Grid Floors Earn Their Keep
The common thread is water: wherever a process floor gets hosed, splashed or rained on, open steel grid flooring keeps a walkable, drainable surface instead of a shallow pool.
Wet process floors
Process water drains through the grid as it is made — no standing layer between operators and the line.
Washdown platforms
SS304 / SS316 grid floors for food and chemical wash zones — hosed clean, nothing to blister or peel.
Trench & drainage covers
The same grid doubles as a trench grating cover — floor and channel in one steel system.
Wet-zone stair treads
Serrated grating treads to match the floor — specified, finished and shipped in the same order.
Specifications
Metal Grid Floor Specifications
| Parameter | Range |
|---|---|
| Bearing bar | 20×3 mm to 100×8 mm, plain or serrated |
| Bar spacing | 30 / 40 / 60 mm centers; 11 / 11 mm close mesh on the press-locked line |
| Cross bar | Twisted square or round, per specification |
| Panel width | Up to 1.25 m |
| Panel length | Up to 6 m |
| Materials | Q235B carbon steel · SS304 / SS316 stainless |
| Surface | Plain or serrated; black, hot-dip galvanized (ASTM A123 / ISO 1461) or mill-finish stainless |
| Fixings | Saddle clips available as accessories; fixing layout included |
Materials & test documents
Every heat of Q235B, SS304 or SS316 enters production with its mill test certificate verified at goods-in — the first of our five QC stages. Grid floor panels leave with documentation, not promises:
- Mill test certificate to EN 10204 Type 3.1
- Factory inspection report with every shipment
- Declaration of Conformity prepared per order destination
Standards & compliance
Produced to Recognized Standards — Documents on Request
ANSI / NAAMM MBG 531
Grid floor panels produced to MBG 531 reference practice, with joint inspection on our five-stage QC plan.
ASTM A123 / ISO 1461 HDG
Galvanized coating thickness checked by sampling on every galvanized batch before grid floor panels are released.
CE & SGS tested
Certified & tested, reports on request — we show documents you can verify, not a certificate wall.
Custom made
Custom Grid Floors, Cut and Banded to Your Drawings
Send your drawing
Panel sizes, load and span, wet-area duty, quantities — or just photos and a sketch. Drawing review is free.
Quote within 24 hours
Itemized, FOB Tianjin as standard — EXW or CIF on request. Small trial orders welcome.
Samples in 5–7 days, production in 15–25
Working days after drawing confirmation, hot-dip galvanizing included. Installation drawings and fixing layout ship with the order.
Factory-direct quote
Get a Factory Quote
Send panel sizes, duty and quantities — an itemized quote lands within 24 hours, free drawing review included. Get a factory quote in 24 hours: grid floor panels, treads and covers in one order.
- Five-stage QC, from MTC verification at goods-in to final inspection
- DoC, MTC EN 10204 3.1 and inspection report with every order
- Factory audits welcome — see the lines before you commit
Prefer to talk? WhatsApp us or sales@dtsteelladder.com
Request your quote
Five fields — we do the rest.
FAQ
Frequently Asked Questions
What is the lead time for a metal grid floor order?
Samples ship in 5–7 working days and mass production runs 15–25 working days after drawing confirmation, hot-dip galvanizing included. Rush production in 10–15 days is possible with a surcharge — ask in your quote.
Which grid floor finish suits a washdown area: HDG or stainless steel?
For general wet areas, Q235B carbon steel with hot-dip galvanizing to ASTM A123 / ISO 1461 is the standard choice. For food, chemical and marine washdown zones, specify SS304 or SS316 stainless grid flooring — tell us the environment and we will recommend one inside your 24-hour quote.
Do you accept small trial orders of grid floor panels?
Yes — small trial orders are welcome. Full-container orders are calculated per loading plan, and grid floor panels, stair treads and trench covers can ship together in one order from Tianjin Port on FOB terms.
Related pages
Related Grating Pages
Open Grid Steel Flooring
Grid orientation and load bars in the direction of traffic.
View page →Open Steel Flooring
Ventilation, light and spill-through — and when to go close mesh.
View page →Grated Metal Floor
Bearing bar selection by duty, plain vs serrated surfaces.
View page →Mesh Grating Flooring
A specification checklist for complete project floors.
View page →Steel Grating Mesh
Mesh patterns and what each spacing suits — loads, heels, drainage.
View page →Floor Grating
Load direction, deflection and foot-traffic flooring basics.
View page →