Factory-direct steel gratings & stair treads, shipped worldwide
Welded Grating
Welded grating from in-house forge-weld & press lines, flat and strong.
Factory-direct, FOB Tianjin · Itemized quote within 24 hours
Welded in-house
Forge-weld line in our own 3,000 ㎡ workshop
Certified & tested
Reports on request, MTC EN 10204 3.1 with every order
Samples in 5–7 days
Production in 15–25 working days
Factory-direct FOB Tianjin
Shipped worldwide, EXW / CIF negotiable
Variant map
One Welded Line, Four Ways to Order It
Every welded grating panel we ship starts from the same forge-welded frame — you choose the material and the surface. This map covers the four variants buyers actually order; each one is made in the same workshop, on the same in-house line.
| Variant | Material | Surface | Specify it for |
|---|---|---|---|
| Black welded grating | Q235B carbon steel | Plain mill finish, painted on site if needed | Dry indoor plant flooring, panels integrated into a painted structure |
| Galvanized welded grating | Q235B, hot-dip galvanized | Plain or serrated, ASTM A123 / ISO 1461 coating | Outdoor platforms, walkways and trench covers exposed to weather |
| Serrated welded grating | Q235B, black or galvanized | Tooth profile machined into the bearing bar tops | Walking surfaces exposed to water, oil or frost |
| Stainless welded grating | SS304 or SS316 | Plain or serrated | Food, chemical and marine washdown areas |
Every variant is open mesh — water, light and debris pass through the panel instead of collecting on it. Not sure which one fits your project? Send your drawings — we will map the variant inside the 24-hour quote.
Process comparison
Welded vs Press-Locked vs Swage-Locked vs Riveted
The forming process decides how the joint holds, how fine the mesh can go and how the panel behaves under load. Here is the honest comparison — including which of these lines actually run in our workshop.
| Dimension | Welded | Press-Locked | Swage-Locked | Riveted |
|---|---|---|---|---|
| Joint principle | Every bearing-bar / cross-bar crossing fused under pressure | Cross bars pressed into notched bearing bars, no weld heat | Cross bars swaged through pre-punched bearing bars | Bearing bars riveted to each cross member |
| Wins at | High loads over wide spans; joints cannot work loose under vibration | Dense, uniform mesh for pedestrian floors | Fine patterns with high transverse stiffness | Very open mesh in light panels |
| Mesh range | 30 / 40 / 60 mm centers | Down to 11 / 11 mm close mesh | Dense patterns, depends on bar selection | Wide, airy openings |
| Surface path | Plain or serrated, black or hot-dip galvanized | Plain bars, usually galvanized after locking | Plain bars | Plain or painted |
| Our supply | In-house — electro-forging forge-weld line | In-house — press-lock machine | Assessed per project on our press line | Not an in-house line — we say so in your quote |
Still weighing the processes? Send your drawings — we will spec it and tell you plainly if another process serves your loads better.
Zoomed in
What Happens at a Single Welded Joint
1 · Fusion under pressure
At every crossing, current and force meet at one point: bearing bar and twisted cross bar are resistance-forged until they fuse. No filler wire, no clips — the joint is the bar itself.
2 · Flat in one pass
Because the forge cycle is short and evenly applied, welded grating leaves the line flat — the bar tops sit in one plane without post-weld straightening. Panels lay down fast on site.
3 · Black, or zinc all over
Galvanized welded grating goes to a certified hot-dip partner near our mill for an ASTM A123 / ISO 1461 coating that covers every joint — typically 2–3 days, already inside your production window.
Why welded
Why Buyers Order Welded Grating Factory-Direct
Flat-top surface, high-load frame
Flat bearing-bar tops give a level walking surface while the one-piece welded frame spreads wheel and foot loads across the whole panel — flat and strong at any span.
In-house made, one accountable factory
Forge-weld and press lines run under one roof in our own workshop — the team that welds your panels also inspects them, and factory audits are welcome before you commit.
Samples and small MOQ
Welded grating samples in 5–7 working days, small trial orders welcome, custom sizes cut and banded to your drawings — an itemized factory quote lands within 24 hours.
Applications
Where Welded Grating Panels Go
Open mesh that lets water, light and debris fall through instead of pooling — welded panels are the working surface wherever people, wheels and steel flooring meet.
Plant flooring & mezzanines
Open-mesh floors over plant and warehouse levels — light passes down, spills drain through.
Walkways & access platforms
Catwalks, gantry access and roof walkways — specify by span direction and load, not by guesswork.
Trench, drain & pit covers
Covers that hold traffic above while the channel below stays free-flowing and serviceable.
Stair treads
Welded treads in plain or serrated surface, with banded ends and nosing options.
Walkway applications → · Drainage applications → · All application pages →
Specifications
Welded Grating Specifications
| Parameter | Range |
|---|---|
| Bearing bar size | 20×3 mm up to 100×8 mm |
| Bearing bar surface | Plain flat, or serrated tooth profile |
| Bar centers | 30 / 40 / 60 mm |
| Cross bars | Twisted square or round, forge-welded at every crossing |
| Panel size | Up to 1.25 m wide × 6 m long |
| Grades | Q235B carbon steel · SS304 / SS316 stainless |
| Finish | Black mill, or hot-dip galvanized to ASTM A123 / ISO 1461 |
| Common designations | 19W4 and custom equivalents |
Materials & test documents
Material traceability starts at goods-in, where the mill test certificate of every Q235B, SS304 or SS316 heat is verified — the first of our five QC stages. What leaves the workshop is paper, not promises:
- Mill test certificate to EN 10204 Type 3.1
- Weld inspection on the five-stage QC plan, report with every shipment
- Declaration of Conformity prepared per order destination
Standards & compliance
Produced to Recognized Standards — Documents on Request
ANSI / NAAMM MBG 531
Welded panels produced to MBG 531 reference practice, with weld checks built into our five-stage QC plan.
ASTM A123 / ISO 1461 HDG
Galvanized welded grating coating thickness checked by sampling on every galvanized batch before release.
CE & SGS tested
Certified & tested, reports on request — we hand over documents you can verify, not a certificate wall.
Custom made
Custom Welded Grating, Cut and Banded to Your Drawings
Send your drawing
Panel sizes, bar spacing, quantities and destination — or start from photos and a sketch. Drawing review is free.
Quote within 24 hours
Itemized and factory-direct, FOB Tianjin as standard — EXW or CIF negotiable. 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 in 24 Hours
Custom welded grating from small MOQ — send panel sizes and quantities, and an itemized quote lands within 24 hours with 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 forge-weld line 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 welded grating?
Welded grating is an open-mesh steel panel: parallel bearing bars carry the load, cross bars lock them in place, and every intersection is resistance-forged under pressure so the bars fuse into one piece. There are no clips or rivets that can work loose, which is why welded grating is the default for platforms, walkways and trench covers.
Plain or serrated bars, black or galvanized finish?
Order serrated bearing bars where the walking surface is exposed to water, oil or frost — the tooth profile is machined into the bar as a grip feature. Order plain flat bars for dry interiors and steady pedestrian traffic. For finish, hot-dip galvanizing to ASTM A123 / ISO 1461 is the default for outdoor exposure; black mill finish suits panels painted on site or used indoors.
Can I order welded grating samples or a small trial quantity?
Yes — welded grating samples ship in 5–7 working days and small trial orders are welcome. Full production runs 15–25 working days after drawing confirmation, hot-dip galvanizing included, and both windows are confirmed in your 24-hour quote.
Related pages
Related Process Grating Pages
Welded Steel Grating
The engineering deep-dive on the same line — process, specs and load framing.
View page →Electro-Forged Grating
The electro-forging process that fuses every joint on our in-house line.
View page →Press-Welded Grating
The press-welded branch of the welded family — flat panels for heavy floors.
View page →Press-Locked Grating
No-weld close mesh down to 11 / 11 mm for trench covers and facades.
View page →Heavy-Duty Welded Grating
Thicker bars and closer centers for wheel and forklift traffic.
View page →Swage-Locked Grating
Swaged cross bars through pre-punched bearing bars — fine-mesh duty.
View page →