Factory-direct steel gratings & stair treads, shipped worldwide
W-19-4 Grating
19W4 bar grating and custom specs, both available. Welded, HDG finish.
Itemized quote within 24 hours · Free drawing review included
In-house welded line
W-pattern equivalents run on our electro-forging 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
Designation literacy
One Pattern, Several Ways to Write It
Buyers reach this page by typing the same panel pattern in different spellings — W-19-4 with hyphens, 19W4 as one catalog word, or spaced forms like w 19 4 grating and 19 w 4 bar grating. Punctuation changes; the geometry does not, so a 19w4 grating order is the same welded pattern on the same line. Here is how the W-series notation is written and read, spelling by spelling.
| Spelling | How it reads | Where you will meet it |
|---|---|---|
| W-19-4 | Letter first, hyphens between: welded construction, 19-series bearing pitch, 4-series cross pitch | Search boxes, emails and RFQ forms — the dash spelling buyers type when asking around |
| 19W4 | The catalog form: the construction letter wrapped by the two pitch numbers | Stock lists, drawings and North American specification tables — see the 19W4 steel grating page |
| W 19 4 | Same as W-19-4 with spaces standing in for the hyphens | Typed queries — search engines ignore the spacing, the panel does not care |
| 19 W 4 | The spaced, number-first form of the same three elements | Typed queries such as 19 w 4 bar grating — arrives in our inbox weekly |
| 19W2 / W-19-2 | The close cousin: same bearing pitch class, cross bars doubled up on 2 in centers | Quoted the same way when transverse load or small objects matter |
Whatever the punctuation, the reading order of W-series notation stays constant: the construction letter first — W for welded, bars fused at every intersection — then the bearing-bar pitch class, then the cross-bar pitch class. One honest note: this is a public industry naming convention, not a brand we own. On our side, whichever spelling you send is translated into geometry before quoting, and that spelling-to-geometry mapping is confirmed in writing in your quote — nothing gets lost between your PO and our floor.
Not sure your spelling matches your intent? Send the designation however you write it — we will map it inside the 24-hour quote.
Duty framing
What the W-19-4 Pattern Is Built For
1 · Open mesh that sheds
Rain, snow, oil and debris drop straight through instead of pooling on the walking surface. That is the point of the open pattern class — a floor that drains itself outdoors and washes down indoors.
2 · W means welded
The W in every spelling of this designation stands for welded construction: every bearing-bar and cross-bar intersection fused under pressure. Loads travel along the bearing bars; joints cannot work loose under vibration.
3 · General industrial duty
The pattern class is sized for foot and maintenance traffic — platforms, walkways, trench covers. Wheel and axle loads step up to heavy-duty bar grating; heel-conscious floors step down in pitch to 11W4 grating.
Why quote this pattern from us
The Pattern, or Custom — One Factory Order
Pattern spec or custom to drawing
Quote the designation-equivalent pattern as written, or change bar height, thickness, pitches and panel sizes entirely — both come off the same welded line, both cut and banded to your drawings.
HDG finish as standard
Hot-dip galvanizing to ASTM A123 / ISO 1461 practice through our certified partner near the mill — typically 2–3 days, already counted inside your production window. Black steel available for shop-primed projects.
Samples in 5–7 days, small MOQ
Check the pitch, the finish and the weld quality on a sample panel before committing. Small trial orders are welcome, and full-container orders are calculated per loading plan — shipped worldwide from Tianjin.
Applications
Where the Pattern Shows Up on Drawings
Under any of its spellings, this is the general-duty open-mesh panel written into plant flooring, access and drainage specs.
Plant platforms & walkways
Maintenance platforms, elevated walkways and machine access — the default duty for this pattern class.
Trench & drainage covers
Open mesh over channel drains and gullies — water through, people and tools on top.
Mezzanines & storage floors
Light, ventilated flooring for storage levels — sprinkler water and dust pass through.
Stair treads
The same welded construction as treads — plain or serrated, with nosing and end plates.
Specifications
W-19-4 Pattern Panels: Our Real Range
| Parameter | Range |
|---|---|
| Designation handled | W-19-4 = 19W4 = W 19 4 — one pattern |
| Construction | Welded — electro-forged at every intersection |
| Bearing pitch class | ≈30 mm centers (19/16 in equivalent) |
| Cross pitch | ≈102 mm (4 in equivalent), set to your drawing |
| Bearing bar | 20×3 mm to 100×8 mm, plain or serrated |
| Panel size | Up to 1.25 m wide × 6 m long |
| Materials | Q235B carbon steel · SS304 / SS316 stainless |
| Surface | Black or hot-dip galvanized (ASTM A123 / ISO 1461) |
Materials & test documents
Every heat of Q235B, SS304 or SS316 enters production with its mill test certificate verified at goods-in — the first of our five QC stages. 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
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
From Your Spelling to a Panel on the Floor
Send it however you write it
A drawing, or just the designation as you use it — W-19-4, 19W4 or spaced — plus panel sizes, loads and quantities. Review is free.
Quote within 24 hours
Itemized, FOB Tianjin as standard — EXW or CIF on request. The spelling-to-geometry mapping is confirmed in the quote so both sides read the same panel.
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
Get a factory quote in 24 hours — the pattern and custom sizes in one order. Send the designation however you spell it; we confirm the geometry in the quote.
- 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
Is W-19-4 grating the same as 19W4?
Yes — W-19-4, 19W4, W 19 4 and 19 W 4 are spellings of the same industry designation: W for welded construction, 19 for the bearing-bar pitch class and 4 for the cross-bar pitch. The pattern is a public naming convention, not a brand, so we quote it as designation-equivalent panels produced to your spec.
Can you produce the pattern in metric sizes?
Yes. Our welded line runs metric equivalents of the pattern: bearing bars from 20×3 mm to 100×8 mm on ≈30 mm centers, cross pitch set to your drawing, panels up to 1.25 m wide and 6 m long, in black or hot-dip galvanized finish.
What is the lead time and minimum order?
Samples ship in 5–7 working days and mass production runs 15–25 working days after drawing confirmation, both including hot-dip galvanizing. Small trial orders are welcome; full-container orders are calculated per loading plan.
Related pages
Related Specification Pages
19W4 Steel Grating
The catalog-spelling sibling — the designation decoded element by element.
View page →19W4 Load Table
How load and span data for this class is built — full tables with your quote.
View page →11W4 Grating
Closer bearing centers for pedestrian and heel-conscious floors.
View page →Bar Grating Panel
The panel-level view: dimensions, banding and fixing options.
View page →11W4 Bar Grating
The same close-pitch pattern in bar-grating framing.
View page →4x8 Steel Grating
Imperial sheet sizes and their metric equivalents on our line.
View page →