Factory-direct steel gratings & stair treads, shipped worldwide
Galv Grating
Hot-dip galvanized steel grating, welded or press-locked, made to order.
Itemized quote within 24 hours · Mill test certificates (EN 10204 Type 3.1) with every shipment
Zinc over a Q235B steel core
Welded or press-locked, hot-dip galvanized
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
Why Galvanized Is the Default Weather Protection
Galv grating is a finish and a material story at once: a Q235B carbon steel core carries the load, and a hot-dip zinc skin stands between the steel and the weather. That combination is the default outdoor choice — here is how it sits against the other three materials we run.
| Material | Weather & corrosion behavior | Typical environment | Relative cost | Documentation |
|---|---|---|---|---|
| Carbon steel Q235B | Needs coating or paint for weather exposure | Indoor platforms, dry plant floors | Baseline | MTC EN 10204 3.1 per heat |
| Hot-dip galvanized Q235B | Zinc skin shields the steel core from rain, snow and salt air | Outdoor walkways, trench covers, facades, exterior treads | 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 |
This page anchors the galvanized family — go deeper: hot-dip galvanized grating (process focus) · HDG grating (coating standards) · galvanized bar grating (the workhorse panel) · galvanized steel grating panels (formats and sizes).
Undecided between materials? Send your drawings — we will spec it inside the 24-hour quote.
The galvanized line
Steel Core, Zinc Skin — How Galv Grating Is Built
1 · The steel core
Bearing bars and cross bars of Q235B carbon steel, joined on our welded steel grating line or press-locked for close mesh — the same construction as our black steel grating.
2 · Hot-dip immersion
Finished panels go to a certified galvanizing partner near our mill and are immersed in molten zinc. The coating bonds to the steel and reaches every bar, weld and cut edge — typically 2–3 days, already inside your production window.
3 · Coating check per batch
Coating thickness is checked by sampling on every galvanized batch, referenced to ASTM A123 and ISO 1461 — the fourth of our five QC stages — before any panel is released.
Why specify galvanized
Why Buyers Default to Galvanized Grating Outdoors
Zinc skin over a steel core
Hot-dip galvanizing is the default weather protection over Q235B: the zinc layer stands between the steel and rain, snow and salt air, covering outdoor walkways, trench covers and facades year-round.
Traceable material, MTC with every shipment
The Q235B core is traceable heat by heat through mill test certificates (EN 10204 Type 3.1) with every shipment — verified at goods-in, the first of our five QC stages.
Custom sizes, grade options, small MOQ
Panels cut and banded to your drawings, welded or press-locked, any size up to 1.25 m × 6 m. Small trial orders welcome; other grade options on request.
Applications
Where Galvanized Grating Earns Its Zinc
Anywhere steel meets weather, standing water or de-icing salt — the zinc skin keeps the Q235B core working without repaint cycles.
Outdoor walkways & catwalks
Open mesh sheds rain, snow and debris — zinc keeps the frame sound season after season.
Municipal trench & drainage covers
Galvanized covers over road and curb trenches, gullies and catch basins.
Exterior & escape stair treads
Galvanized treads with serrated or plain surfaces for fire escapes and outdoor stairs.
Tree pits, fences & facade grids
Open galvanized grids for planting pits, gates and facade screening.
Walkway spans & loads in detail → · Explore all application pages →
Specifications
Galvanized Grating Specifications
| Parameter | Range |
|---|---|
| Core material | Q235B carbon steel, heat traceable |
| Bearing bar | 20×3 mm to 100×8 mm, plain or serrated |
| Bar spacing | 30 / 40 / 60 mm centers |
| Construction | Electro-forged welded or press-locked (close mesh to 11/11 mm) |
| Panel width | Up to 1.25 m |
| Panel length | Up to 6 m |
| Finish | Hot-dip galvanized, ASTM A123 / ISO 1461 referenced |
| Coating control | Thickness sampling on every galvanized batch |
| Lead times | Samples 5–7 working days · production 15–25, HDG included |
Materials & test documents
Every heat of Q235B enters production with its mill test certificate verified at goods-in. Galvanized panels leave the line with mill test certificates (EN 10204 Type 3.1) with every shipment — documentation, not promises:
- Mill test certificate to EN 10204 Type 3.1, per heat
- Coating thickness results sampled per galvanized batch
- Factory inspection report with every shipment
- Declaration of Conformity prepared per order destination
Standards & compliance
Produced to Recognized Standards — Documents on Request
ASTM A123 / ISO 1461
Galvanized coating checked by sampling on every batch, referenced to both standards, before panels are released.
ANSI / NAAMM MBG 531
Panels produced to MBG 531 reference practice, with weld inspection on our five-stage QC plan.
CE & SGS tested
Certified & tested, reports on request — we show documents you can verify, not a certificate wall.
Custom made
Custom Galvanized Panels, Cut and Banded to Your Drawings
Send your drawing
Panel sizes, load specs, 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 and quantities — gratings, treads and covers are quoted together, and an itemized quote lands within 24 hours.
- Five-stage QC, from MTC verification at goods-in to coating sampling before release
- Mill test certificates (EN 10204 Type 3.1) with every shipment
- 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
How is the galvanized coating checked?
Coating thickness is checked by sampling on every galvanized batch, referenced to ASTM A123 and ISO 1461, before panels are released for shipping.
What steel is under the zinc?
A Q235B carbon steel core — the same structural grade used across our welded and press-locked lines — with its heat traceable through mill test certificates (EN 10204 Type 3.1) with every shipment.
How long does galvanizing add to production?
Hot-dip galvanizing runs at a certified partner plant near our mill and typically takes 2–3 days, already counted inside the 15–25 working-day production window. Samples in 5–7 working days include galvanizing.
Related pages
The Galvanized Family
Hot-Dip Galvanized Grating
The immersion process in focus — coating thickness sampling, 2–3 day cycle.
View page →Galvanized Bar Grating
The workhorse outdoor panel — bar construction under a zinc skin.
View page →Galvanized Grid
Mesh geometries with zinc protection for outdoor grids.
View page →HDG Grating
The coating itself — how hot-dip galvanizing bonds to steel.
View page →Galvanized Steel Grating Panels
Panel formats — dimensions up to 1.25 m × 6 m, custom cutting, banding.
View page →Galvanized Grating for Sale
The buying path — RFQ, drawing review, samples, FOB Tianjin.
View page →