Factory-direct steel gratings & stair treads, shipped worldwide
19W4 Steel Grating
Need 19w4 steel grating data? Factory engineers reply in 24 hours.
Itemized quote within 24 hours · Free drawing review included
In-house weld & press lines
19W4-class panels run on our own 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
Read the designation
What 19W4 Actually Specifies
19W4 is the workhorse of industrial flooring — the welded panel class written into more platform and walkway specs than any other. It is a public North American naming convention, and it decodes into exactly the geometry our welded line runs. Here is the honest translation, number by number. (The notation family also covers lighter and heavier classes such as the 19W2 grating pattern, which reads the same way: bars at a fixed pitch, depth and thickness stated in the name.)
| Element | What it encodes | Imperial | Metric equivalent on our line |
|---|---|---|---|
| 19 | Bearing bar pitch — the span between load-carrying bars | 19/16 in centers (1-3/16 in) | ≈30 mm — our standard welded bearing pitch |
| W | Welded construction — bars fused at every intersection | Electro-forged pressure welding | In-house welding line, no clips to loosen |
| 4 | Cross bar pitch — the transverse bar spacing | 4 in centers | ≈102 mm — set to your drawing, quoted per project |
| 19W4 | The full panel class — open mesh, general industrial duty | Most-specified welded designation | Produced as designation-equivalent panels |
| 19W2 | Same bearing pitch, cross bars doubled up | Cross bars on 2 in centers | ≈51 mm cross pitch — quoted the same way |
One honest note: 19W4 is an industry-standard designation, not a brand we own. What we quote is designation-equivalent panels produced to your spec — same ≈30 mm bearing pitch class, same open-mesh duty, from our real range below. For the sibling naming style, see W-19-4 grating; for load and span data, start at the 19W4 load table page.
Not sure which pitch your loads need? Send your drawings — we will size it inside the 24-hour quote.
How we build it
From Designation to Panel on Our Floor
1 · Pitch set to the class
Bearing bars go down at the ≈30 mm pitch the 19W4 class calls for — our standard welded spacing — with cross bar pitch set to your drawing, the ≈102 mm class value quoted per project.
2 · Forged, not fastened
Every bearing-bar and cross-bar intersection is resistance-forged under pressure on our electro-forging line — one solid panel, no rivets or clips to work loose under wheel loads.
3 · Black or hot-dip galvanized
Panels leave in black finish or go to our certified galvanizing partner near the mill for ASTM A123 / ISO 1461 hot-dip galvanizing — typically 2–3 days, already counted inside your production window.
Why quote this class from us
Full 19W4 Specs, Factory Direct
The full designation, decoded for you
Pitch, bar size, span and finish questions answered against our real range — factory engineers reply within 24 hours, and load and span data for your exact spans comes with the quote.
Custom 19W4, cut and banded to drawings
Stock-class panels or fully custom dimensions, notched and banded to your drawings. Samples in 5–7 working days, and small trial orders are welcome before you commit to volume.
HDG to ASTM A123, or black
Hot-dip galvanized coating checked on our five-stage QC plan, or bare black steel for painting in the field. FOB Tianjin as standard, shipped worldwide — EXW or CIF negotiable.
Applications
Where the 19W4 Class Earns Its Keep
Open mesh at the ≈30/100 pitch class sheds water, ice and debris while carrying foot and light wheel traffic — the reason this designation shows up on so many industrial drawings.
Plant platforms & mezzanines
The default flooring class for maintenance platforms and mezzanine decks under general industrial loads.
Walkways & catwalks
Drains rain and spills as you walk — see the walkway panel options for elevated access routes.
Trench & drainage covers
Open-mesh covers over trench runs and gullies, banded edges taking the wheel and kerb loads.
Stair treads & landings
The same welded construction with nosing and end plates — plain or serrated surface per spec.
Specifications
19W4-Equivalent Panels: Our Real Range
| Parameter | Range |
|---|---|
| Designation class | 19W4 / W-19-4 equivalents, welded construction |
| Bearing bar | 20×3 mm to 100×8 mm, plain or serrated |
| Bearing bar pitch | 30 / 40 / 60 mm centers — 30 mm is the 19W4 class |
| Cross bar | Twisted square or round, pitch to your drawing |
| Panel width | Up to 1.25 m |
| Panel length | Up to 6 m |
| Materials | Q235B carbon steel · SS304 / SS316 stainless |
| Surface | Black or hot-dip galvanized (ASTM A123 / ISO 1461) |
| Edge treatment | Banded ends, notches and cutouts to drawing |
Load, deflection and unit-weight figures for your spans and bar sizes are provided with your quote — we do not publish invented tables.
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. 19W4-class 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 19W4-class 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 19W4-class panels are released.
CE & SGS tested
Certified & tested, reports on request — we show documents you can verify, not a certificate wall.
Stock-equivalent or custom
19W4-Class Panels, Cut and Banded to Your Drawings
Send your spec or drawing
Panel sizes, spans and loads, quantities — or just the designation 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 19W4 Quote From the Mill
Send your loads and spans — we size it free, fast. An itemized quote lands within 24 hours, 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 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
What does the 19W4 designation mean?
19W4 is a public North American grating designation: 19 stands for bearing bars on 19/16 in (≈30 mm) centers, W for welded construction, and 4 for cross bars on 4 in (≈102 mm) centers. We produce designation-equivalent panels on our own welded line — the ≈30 mm bearing pitch is our standard 30 mm spacing.
Can you supply 19W4 panels in custom sizes and finishes?
Yes. Panels are cut and banded to your drawings within our real range — bearing bars from 20×3 mm to 100×8 mm, spacings of 30/40/60 mm, panels up to 1.25 m wide and 6 m long — in black or hot-dip galvanized finish to ASTM A123 / ISO 1461.
What is the lead time for 19W4 steel grating?
Samples ship in 5–7 working days and mass production runs 15–25 working days after drawing confirmation, hot-dip galvanizing included. Rush production in 10–15 days is possible with a surcharge — ask in your quote.
Related pages
Related Specification Pages
W-19-4 Grating
The same designation in W-19-4 writing — spacing, panel and finish detail.
View page →11W4 Grating
The closer-centre sibling for pedestrian and heel-conscious floors.
View page →19W4 Load Table
How load and span data for this class is built — provided with your quote.
View page →Bar Grating Panel
The panel-level view: dimensions, banding and fixing options.
View page →4x8 Steel Grating
Stock panel formats and metric equivalents of imperial sheet sizes.
View page →Walkway Grating
Where the 19W4 class is most at home — walkway duty and panel choice.
View page →