Factory-direct steel gratings & stair treads, shipped worldwide
Galvanized Iron Grating
Galv Iron Grating: every batch ships with traceable mill test certificates.
Itemized quote within 24 hours · Mill test certificates (EN 10204 Type 3.1) with every shipment
GI means galvanized Q235B steel
"Iron" in trade talk, steel on the certificate
Certified & tested
Reports on request, MTC with every order
Samples in 5–7 days
Production in 15–25 working days, HDG included
FOB Tianjin
Shipped worldwide, EXW / CIF negotiable
Steel grating material comparison
Where "Galvanized Iron" Sits in the Material Line-Up
Two words, two engineering decisions. "Iron" in trade language means low-carbon steel — Q235B at our mill. "Galvanized" means the panel went through a hot-dip zinc bath after fabrication. So a galvanized iron grating order leaves here as hot-dip galvanized Q235B steel grating, and the paperwork says exactly that. A galvanized steel grating 1m panel or a longer run is the same product on the same line — length is just a cutting detail. Here is how that material sits against the other three we run.
| Material | Weather & corrosion behavior | Typical environment | Relative cost | Documentation |
|---|---|---|---|---|
| Carbon steel Q235B, black | Needs coating or paint for weather exposure | Indoor platforms, dry plant floors | Baseline | MTC EN 10204 3.1 per heat |
| Hot-dip galvanized Q235B — "GI" | Zinc skin shields the steel core from rain, snow and salt air | Outdoor walkways, trench covers, exterior treads, tree pits | Baseline plus galvanizing | MTC 3.1 + coating sampling to ASTM A123 / ISO 1461 |
| SS304 stainless | Corrosion-resistant without any coating | Food plants, washdown areas, general chemical duty | Premium | MTC EN 10204 3.1 per heat |
| SS316 stainless | Added chloride resistance for harsh exposure | Marine, coastal, chemical process areas | Premium plus | MTC EN 10204 3.1 per heat |
Writing the same panel in family terms: iron grating (the uncoated parent) · hot-dip galvanized grating (the process focus) · galvanized bar grating (the workhorse panel) · galvanized steel grating (the full system view).
Undecided between materials? Send your drawings — we will spec it inside the 24-hour quote.
Terminology, settled
Write "GI Grating" — We Quote the Same Panel Either Way
1 · The "iron" half — it is steel
Pure iron is soft and nobody builds grating from it. Every "iron grating" on the market is low-carbon steel — at our mill that is Q235B, bought by heat number and verified at goods-in, the first of our five QC stages.
2 · The "galvanized" half — zinc, dipped
After cutting and banding, panels go to a certified hot-dip galvanizing partner near our mill — a 2–3 day cycle already counted inside your production window. Coating thickness is checked by sampling to ASTM A123 / ISO 1461 before release.
3 · What the paperwork calls it
Quotes and certificates use mill language, not nicknames: grade Q235B, finish hot-dip galvanized, chemical analysis per heat. So when a tender line says grating galvanized, your customs file and your QA file agree on what shipped.
"GI grating" is everyday shorthand in South Asian, Southeast Asian and Gulf markets, and we quote it the same way everywhere: welded (electro-forged) or press-locked construction, Q235B core, zinc finish, cut to your cutting list.
Why specify GI
Why Buyers Keep Writing "Galvanized Iron" on the Purchase Order
Rust-resistant zinc for wet sites
The dipped skin covers every bar, joint and cut edge — the reason galvanized grating is the default panel for rain, washdown and coastal air. Corrosion-resistant in practice, not by promise.
MTC 3.1 — grades you can verify
Every heat carries a traceable mill test certificate, and finished panels ship with EN 10204 Type 3.1 documents. You check the chemistry against your spec instead of trusting the nickname on the order.
Cut to your sizes, small MOQ fine
Standard 1 m panels or full 1.25 m × 6 m sheets cut and banded to your drawings — any size, from small trial orders to full containers calculated per loading plan.
Applications
Where GI Grating Earns Its Zinc
Anywhere steel meets weather, the galvanized panel is the economical answer — the zinc skin does the weather duty while the Q235B core carries the load.
Outdoor walkways & platforms
Rain-shedding open mesh for exterior plant access — see walkway grating.
Trench & drainage covers
Constantly wet duty where paint fails fast — zinc keeps covers serviceable.
Exterior stair treads
Galvanized treads with serrated or plain surfaces for outdoor stairs and escapes.
Tree pits & facade grids
Municipal and architectural grids that live outdoors year-round.
Specifications
GI Grating Specifications — Grade Stated, Finish Dipped
| Parameter | Range |
|---|---|
| Core grade | Q235B low-carbon steel ("iron" in trade language) |
| Bearing bar | 20×3 mm to 100×8 mm, plain or serrated |
| Bar spacing | 30 / 40 / 60 mm centers |
| Panel width | Up to 1.25 m — 1 m the common format |
| Panel length | Up to 6 m |
| Processes | Welded (electro-forged) or press-locked |
| Finish | Hot-dip galvanized to ASTM A123 / ISO 1461 |
| Stock designation | 19W4 and custom equivalents |
Materials & test documents
Whatever the order calls it, we ship mill test certificates (EN 10204 Type 3.1) with every shipment, plus coating data and a factory inspection report:
- Mill test certificate to EN 10204 Type 3.1, per heat
- Coating thickness sampling to ASTM A123 / ISO 1461
- Declaration of Conformity prepared per order destination
Standards & compliance
Produced to Recognized Standards — Documents on Request
ASTM A123 / ISO 1461
The hot-dip zinc finish, sampled for coating thickness on every galvanized batch before panels are released.
EN 10204 Type 3.1
The material certificate format behind every MTC we issue — heat-traceable chemistry for the Q235B core.
CE & SGS tested
Certified & tested, reports on request — we show documents you can verify, not a certificate wall.
Custom made
From "GI Grating" to a Cutting List, in Three Steps
Send your drawing — or just the nickname
"GI grating 1 m panels, 30 mm centres" is enough to start. Full drawings, load specs and quantities are welcome too. Drawing review is free.
Quote within 24 hours
Itemized, FOB Tianjin as standard — EXW or CIF on request. The grade and finish are written out in plain mill language, 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, and material certs are ready to preview.
Factory-direct quote
Get a Galvanized Iron Grating Quote
Send your galvanized iron grating specs and an itemized factory quote lands within 24 hours — free drawing review included, material certs ready to preview.
- 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
Galvanized Iron Grating Questions, Answered Plainly
Is galvanized iron grating actually made of iron?
No. In trade language iron is shorthand for low-carbon steel — the bars we run are Q235B carbon steel, hot-dip galvanized after fabrication. The mill test certificate states the actual heat chemistry, so what arrives matches what your spec calls for.
Do galvanized iron grating panels come with certificates?
Yes. Every heat enters production with its mill test certificate verified at goods-in, and finished panels ship with the EN 10204 Type 3.1 certificate, a factory inspection report and coating thickness sampling to ASTM A123 / ISO 1461. Certified and tested, reports on request.
What sizes and lead times apply to GI grating orders?
Panels run up to 1.25 m wide and 6 m long, with 1 m formats the common width, cut and banded to your drawings. Samples ship in 5–7 working days and production runs 15–25 working days after drawing confirmation, hot-dip galvanizing included. FOB Tianjin, itemized quote within 24 hours.
Related pages
The Iron and Galvanized Family
Iron Grating
The parent term — where "iron" means Q235B carbon steel, uncoated or painted.
View page →Galvanized Bar Grating
The same GI panel by its construction name — bearing bars and cross bars under zinc.
View page →Galv Grating
The galvanized family hub — material comparison across the whole zinc-finished line.
View page →Wrought Iron Grating
Another "iron" nickname from the decorative market — and what it means for real orders.
View page →Galvanized Grid
Grid and mesh geometries with the same hot-dip zinc protection.
View page →Galvanized Steel Grating Panels
Panel formats and sizes up to 1.25 m × 6 m, custom cutting and banding.
View page →