Factory-direct steel gratings & stair treads, shipped worldwide
Metal Bar Grating
Steel bar grating for platforms, walkways and floors, made to order.
Itemized quote within 24 hours · Free drawing review included
Q235B · SS304 · SS316
Three metals, one bar construction, verified at goods-in
Certified & tested
Reports on request, mill certificates with every shipment
Samples in 5–7 days
Production in 15–25 working days
FOB Tianjin
Shipped worldwide, EXW / CIF negotiable
Metal comparison
Q235B vs SS304 vs SS316 — Same Bars, Different Metal
Metal bar grating is one construction — load-bearing bars locked with cross bars. What changes between grades is not the panel, it is how the metal fights corrosion and how far you need to go. Here is the honest comparison of the three metals we run in production.
| Dimension | Q235B Carbon SteelDefault | SS304 Stainless | SS316 Stainless |
|---|---|---|---|
| Strength character | High structural strength per section — the heavy-duty bar grating default | Slightly lower yield than Q235B; same bar sizes carry the same duty | Structurally equal to SS304 — the difference is chemistry, not strength |
| Corrosion class | Must be coated — hot-dip galvanizing is the standard protection | Naturally corrosion-resistant; passivated surface resists rust and staining | Resists chlorides, salt spray and many acids — the marine grade |
| Typical finish | Black mill finish or hot-dip galvanized (ASTM A123 / ISO 1461) | Pickled and passivated; brushed or polished on request | Pickled and passivated; polished for hygiene areas |
| Typical duty | Platforms, walkways, floors, trench covers, wheel loads | Food plants, washdown areas, facades, clean rooms | Marine decks, offshore and chemical plants, coastal works |
| When to choose it | Default choice — specify HDG and it serves outdoors for years | Where rust cannot be tolerated but chlorides are moderate | Only where 304 would pit — salt, brine and chloride chemistry |
| Documentation | All three metals ship with mill test certificates (EN 10204 Type 3.1) with every shipment | ||
Not sure which metal your environment demands? Send your drawings — we will spec the metal inside the 24-hour quote.
From mill to panel
How Your Chosen Metal Becomes Bar Grating
1 · Metal verified at goods-in
Every heat of Q235B, SS304 or SS316 arrives with its mill test certificate, checked before a single bar is cut — the first of our five QC stages.
2 · One bar construction
The same bar construction is formed on our in-house lines regardless of metal — bearing bars and cross bars joined into a single solid panel, plain or serrated.
3 · Finished to match the metal
Q235B panels go to a certified galvanizing partner for ASTM A123 / ISO 1461 hot-dip galvanizing — typically 2–3 days, already counted in your production window. Stainless panels ship pickled and passivated, ready for washdown duty.
Why Dengtai
A Metal Bar Grating Manufacturer You Can Audit
Factory-direct, one mill behind every panel
Metal bar grating supplied manufacturer-direct from our own workshop — no trading desk between you and the line. FOB Tianjin as standard, EXW or CIF negotiable.
Heavy-duty and anti-slip by design
Bearing bars from 20×3 mm up to 100×8 mm carry heavy wheel loads; serrated tops turn the same panel into anti-slip bar grating for wet or oily floors.
Custom sizes, samples in 5–7 days
Custom bar grating cut and banded to your drawings — 19W4 stock designations or fully custom dimensions. Bar grating samples ship in 5–7 working days, small trial orders welcome.
Applications by metal
Where Each Metal Earns Its Place
Most projects start with the duty, not the grade. Match the environment below to the metal, then send us the drawings — we will confirm the choice in your quote.
Platforms & walkways — Q235B + HDG
Galvanized carbon steel bar grating for plant flooring, access ways and heavy traffic.
Food & washdown floors — SS304
Stainless bar grating that shrugs off daily hose-downs and stays bright in hygiene areas.
Marine & chemical — SS316
Chloride-resistant metal grating for offshore decks, brine lines and chemical plants.
Trench & drainage covers — any metal
Open-mesh bar grating covers for drains and gullies — galvanized carbon steel is the default.
Specifications
Metal Bar Grating Specifications
| Parameter | Range |
|---|---|
| Bearing bar | 20×3 mm to 100×8 mm, plain or serrated |
| Bar spacing | 30 / 40 / 60 mm centers |
| Cross bar | Twisted square or round, per specification |
| Panel width | Up to 1.25 m |
| Panel length | Up to 6 m |
| Metals | Q235B carbon steel · SS304 stainless · SS316 stainless |
| Surface | Q235B: black or hot-dip galvanized (ASTM A123 / ISO 1461); stainless: pickled & passivated |
| Stock designation | 19W4 and custom equivalents, cut to drawings |
Metal traceability & test documents
Whichever metal you choose, the paper trail is the same: every heat is verified against its certificate at goods-in, and we ship mill test certificates (EN 10204 Type 3.1) with every shipment. Panels leave with documentation, not promises:
- Mill test certificates (EN 10204 Type 3.1) with every shipment
- 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
Bar grating 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 Q235B panels are released.
CE & SGS tested
Certified & tested, reports on request — we show documents you can verify, not a certificate wall.
Custom made
Custom Metal Bar Grating, Cut and Banded to Your Drawings
Send your drawing
Panel sizes, loads, quantities and the environment the panels will serve — or just photos and a sketch. Drawing review is free.
Quote within 24 hours
Metal recommendation included, 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 for Q235B. Installation drawings and fixing layout ship with the order.
Factory-direct quote
Request Your Quote Today
Request your quote today — the factory replies within 24 hours, with a metal recommendation and free drawing review included.
- 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
Which metal should I choose for bar grating?
Q235B carbon steel with hot-dip galvanizing is the default for platforms, walkways and floors. Move up to SS304 where rust, washdown or hygiene matters, and to SS316 only for marine and chloride-rich chemical duty — we advise on metal choice inside your 24-hour quote.
Do you accept small trial orders?
Yes — small trial orders are welcome. Full-container orders are calculated per loading plan, so you only pay for the steel you ship.
How is metal bar grating shipped and priced?
Shipped worldwide from Tianjin Port — FOB Tianjin as standard, EXW or CIF negotiable. Pricing is itemized per m² or per ton in your quote; we do not publish a fixed price list.
Related pages
Related Bar & Metal Grating Pages
Bar Grating
The construction itself — bearing bars, cross bars and 19W4 style designations.
View page →Carbon Steel Bar Grating
Q235B in depth — MTC per heat and when coating beats stainless.
View page →Stainless Bar Grating
The same bar construction in stainless — welded and press-locked close mesh.
View page →Galvanized Bar Grating
Bar grating plus HDG — the workhorse outdoor panel.
View page →SS Grating
The stainless line overview — SS304 and SS316 grades and their duties.
View page →Structural Grating
Heavy spans, guardrails and mezzanines, produced to MBG 531 reference practice.
View page →