Factory-direct steel gratings & stair treads, shipped worldwide
Galvanized Serrated Grating
Serrated galvanized teeth bite wet or oily soles. Fewer slips on site.
Itemized quote within 24 hours · Free drawing review included
Factory-direct, no middlemen
Serrated or plain surfaces from our own welded line
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
Weather-zone chooser
Where Serrated + Hot-Dip Galvanized Is the Default Spec
This page is about the outdoor combination: a serrated metal grating surface for wet soles, plus a hot-dip galvanized coating for weather that never dries out. If you are new to how the tooth profile itself works, start with the serration fundamentals — then come back and pick your zone. Buyers asking for a serrated galvanized grating almost always sit in one of these three:
| Weather zone | What the walking surface meets | Default spec for the zone |
|---|---|---|
| Rain-wet zones | A water film sits on flat steel; open mesh drains it through the panel instead of across it | Serrated surface + hot-dip galvanized finish |
| Frost & freeze–thaw | Overnight glaze forms on flat bars first; a toothed top still presents many edges to the sole | Serrated surface + hot-dip galvanized finish |
| Snow-melt & de-icing salt | Chloride-rich slush attacks bare steel edges and weld points | Serrated surface + hot-dip galvanized, coating thickness checked by sampling |
| Dry indoor floors | Dust and occasional spills only | Plain surface is usually enough — galvanized, painted or black |
In all three outdoor zones the answer converges on the same panel: serrated top, zinc coating, open mesh. Tell us your exposure and loads — send your drawings and we will spec it inside the 24-hour quote.
Teeth & coating
How the Teeth and the Zinc Work Together
1 · Serrated bearing bars
The teeth are part of the bar profile itself, formed before assembly — not an add-on grit or coating that wears away. Every bearing bar carries the row, so the geometry runs the full walking direction of the panel, and the open mesh drains water through instead of letting it pool.
2 · Forged into panels
Serrated bars are assembled tooth-side up and every bearing-bar / cross-bar intersection is pressure-forged in one pass on our electro-forging line. Panels leave flat, with the full serrated surface presented to foot traffic and banding available on all edges.
3 · Hot-dip galvanized
Finished panels go to a certified galvanizing partner near our mill for ASTM A123 / ISO 1461 hot-dip galvanizing — typically 2–3 days, already counted inside your production window. Because the panel is dipped after the teeth are formed, zinc coats the tooth profile and the joint interiors, not just the flats.
The full hot-dip galvanizing story on our HDG material page →
Why specify the combo
Why Buyers Specify Galvanized Serrated Grating Outdoors
Factory-direct, no middlemen
You buy the serrated galvanized grating from the mill that cuts, forges and inspects it. FOB Tianjin as standard, itemized quote within 24 hours, small trial orders welcome.
Serrated or plain, any size
Both top surfaces run on the same bar range — 20×3 mm to 100×8 mm, at 30 / 40 / 60 mm centers, with 19W4 serrated equivalents. Panels cut and banded to your drawings, free drawing review included.
Stairs covered, mill cert included
The same serrated galvanized surface carries into stair treads and landings, so outdoor routes keep one consistent walking surface. A mill test certificate to EN 10204 3.1 travels with every order.
Applications
Where the Combo Earns Its Keep
Anywhere people walk on steel that the weather touches — this is the serrated metal grating configuration we quote most for exposed sites.
Outdoor walkways & platforms
Rain-exposed access routes where water must fall through, not across, the floor.
Outdoor stairs & treads
Serrated treads with nosing and end-plate options — stairs covered, as the ads say.
Ramps & loading docks
Sloped steel under wheels and boots, plus snow-melt runoff in winter climates.
Trench & drainage covers
Covers over wet channels beside walk zones — HDG holds up to constant moisture.
Specifications
Galvanized Serrated Grating Specifications
| Parameter | Range |
|---|---|
| Bearing bar | 20×3 mm to 100×8 mm, serrated or plain top |
| 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 |
| Material | Q235B carbon steel · SS304 / SS316 on request |
| Surface | Serrated teeth on every bearing bar, or plain |
| Finish | Hot-dip galvanized to ASTM A123 / ISO 1461 practice · black or painted on request |
| Stock designation | 19W4 serrated and custom equivalents |
Materials & test documents
Every heat of Q235B enters production with its mill test certificate verified at goods-in — the first of our five QC stages. Galvanized batches get coating-thickness sampling before release. 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
Serrated welded panels produced to MBG 531 reference practice, with weld inspection on our five-stage QC plan.
ASTM A123 / ISO 1461 HDG
Galvanized coating thickness checked by sampling on every galvanized batch before panels are released.
CE & SGS tested
Certified & tested, reports on request — we show documents you can verify, not a certificate wall.
Custom made
Custom Panels, Cut and Banded to Your Drawings
Send your drawing
Panel sizes, mesh, finish and quantities — or just a sketch marked up with the weather zone it serves. Drawing review is free.
Quote within 24 hours
Itemized, FOB Tianjin as standard — EXW or CIF on request. Surface, finish and designation spelled out line by line. 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 Galvanized Serrated Quote
Send panel sizes, quantities and the weather zone they serve — an itemized quote lands within 24 hours, free drawing review included.
- Serrated or plain, cut to your sizes — both surfaces on the same line
- Hot-dip galvanized to ASTM A123 / ISO 1461, coating checked by sampling
- DoC, MTC EN 10204 3.1 and inspection report with every order
Ask for your galvanized serrated quote today — samples ready in 5–7 days.
Prefer to talk? WhatsApp us or sales@dtsteelladder.com
Request your quote
Five fields — we do the rest.
FAQ
Frequently Asked Questions
How does the serrated surface improve grip on wet floors?
Each bearing bar carries a row of geometric teeth along its top edge. Underfoot, the sole meets many small load-bearing edges instead of one flat plane, and the open mesh lets water drain through the panel instead of pooling on it. It is an anti-slip design feature of the bar profile — we describe the geometry and provide material and coating reports on request.
When should I specify galvanized serrated grating instead of plain?
Specify the serrated surface plus hot-dip galvanizing wherever the panel sits outdoors or meets rain, frost or snow-melt — walkways, stairs, ramps and platforms. For dry indoor floors a plain top surface is usually enough. Both surfaces are available on the same bar sizes, so the choice is made per zone, not per order.
Can I get samples before ordering a full batch?
Yes — samples ship in 5–7 working days including hot-dip galvanizing, and small trial orders are welcome. Send your panel sizes and quantities for an itemized quote within 24 hours.
Related pages
Related Safety & Material Pages
Serrated Grating
Serration fundamentals — how the tooth profile works, geometry first.
View page →Serrated Bar Grating
The bar-construction view of the same serrated line.
View page →19W4 Serrated Grating
19W4 centers with the serrated top surface.
View page →Anti-Slip Grating
All anti-slip approaches compared — serration, close mesh, coatings.
View page →Non-Slip Metal Grating
Selection guide by wet, oily or frost exposure zone.
View page →Hot-Dip Galvanized Grating
The HDG coating story in full — our material-band page.
View page →