Factory-direct steel gratings & stair treads, shipped worldwide
Steel Trench Grating
Handles storm water and truck wheels alike. Trench Grating built for real sites.
Itemized quote within 24 hours · Free drawing review included
In-house weld & press lines
Trench panels made under one roof
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
Spec tables
Steel Trench Grating Spans by Trench Width, Bars by Load Class
Specifying steel trench grating is a two-step read: the trench sets the span, the traffic above it sets the bar section. Bearing bars run across the trench and seat on its shoulders; the panel length runs along it. Read the two tables together, then have the section confirmed in your quote — the numbers below are our real production range, not a generic catalog.
Table 1 · Trench width sets the span
| Nominal trench width | How the grating spans it | Panel length handling |
|---|---|---|
| 100 mm | Bearing bars span the narrow clear width in one strip | Run cut from panels up to 6 m long, joints on banded ends |
| 150 mm | Same single strip; bar section steps up as the clear span grows | Panel lengths cut to your run layout |
| 200–300 mm | The common civil widths; 30 / 40 / 60 mm centers keep the inlet open | One strip covers the trench; no transverse joints mid-run |
| 400–500 mm | Bar section steps up from 30×5 mm as span and class demand | Banded ends carry the joint between panels |
| Over 500 mm | Sections up to 100×8 mm available; mid supports or frames where the span outruns the section | Edge frames quoted as line items |
Bearing bars run across the trench; panels are up to 1.25 m wide, so every common trench width is one strip wide.
Table 2 · Load class sets the bar section
| Class | Test load | Typical location | Typical bar section from our range |
|---|---|---|---|
| A15 | 15 kN | Pedestrian precincts, gardens, basements | Light welded or press-locked, bars from 20×3 mm |
| B125 | 125 kN | Kerbsides, car parks, driveways | 25×3 to 30×3 mm bars at 30/40 mm centers |
| C250 | 250 kN | Carriageways, delivery yards | 30×5 to 40×5 mm bars at 30/40 mm centers |
| D400 | 400 kN | Truck lanes, loading docks, aprons | 50×5 to 100×8 mm bars at 30/40 mm centers |
Class names referenced to EN 124 as a selection guide only; panels are produced to the class you specify, with test reports on request.
Not sure of the class above your trench? Send the trench width and the traffic — we will spec the section inside the 24-hour quote.
Edges and finish
Banded Edges Standard, Hot-Dip Galvanized After Fabrication
A trench panel lives at floor level, in water, under wheels — so the edge and the finish are not options here. Every steel trench grating panel leaves the workshop with closed bar ends and a galvanized skin over every cut and weld.
Banded edges as standard
A banding bar closes every cut bar end, gives the panel a straight seating edge on the trench shoulder, and makes panel joints land true along the run. Banding is quoted in, not added on. Banding types explained →
Hot-dip galvanized after fabrication
Panels go to the kettle after cutting, welding and banding, so the zinc covers every cut end and weld point to ASTM A123 / ISO 1461. Galvanizing runs 2–3 days at our certified partner — already inside the 15–25 day production window.
Q235B steel, or SS trench drain grades
Galvanized Q235B is the default trench grating. Where the run sees washdown, food, chemical or chloride duty, the same bar range comes in SS304 or SS316 — one drawing review covers both. Stainless drain grating →
Why specify ours
Why Buyers Specify Our Steel Trench Grating
Made to spec, any run length
Panels up to 6 m long, cut and banded to your run — no filler sizes, no on-site cutting. Send the layout and the free drawing review comes back inside the 24-hour quote.
High flow that takes truck wheels
Open mesh at 30 / 40 / 60 mm centers passes storm water fast, while the class-selected bar section carries the wheels above — from precinct foot traffic to loading docks. Close mesh to 11/11 mm where heels share the surface.
Batch tested, mill cert with every heat
Certified & tested, reports on request — trench grating is batch tested on our five-stage QC plan and every heat ships with its mill test certificate to EN 10204 Type 3.1.
Applications
Where Steel Trench Grating Works
Any linear drainage run where water arrives along a line and wheels or feet pass over it — the bar section simply follows the class of the traffic above.
Kerb lines & road shoulders
Linear edge collection classed for truck wheels — one run replacing a row of gullies.
Forecourts & loading aprons
D400-grade panels over wide trenches at doors, docks and wash pads.
Plant floors & washdown bays
SS trench drain grades where hoses, chemicals or chlorides rule out plain steel.
Precincts & door thresholds
Close-mesh strips people walk straight over, draining rain at every entrance.
The technical sheet
Steel Trench Grating Specifications
The full parameter sheet behind the two spec tables above. Anything outside these ranges is a drawing question, not a closed door — panels are made to drawings, and the drawing review is free.
| Parameter | Range |
|---|---|
| Bearing bar | 20×3 mm to 100×8 mm, plain or serrated |
| Bar spacing | 30 / 40 / 60 mm centers; press-locked close mesh to 11/11 mm |
| Cross bar | Twisted square or round, per specification |
| Panel width | Up to 1.25 m — covers common trench widths in one strip |
| Panel length | Up to 6 m, cut and banded to the run |
| Edges | Banded ends standard; banding bar matched to the bearing bar |
| Materials | Q235B carbon steel · SS304 / SS316 stainless |
| Surface | Black or hot-dip galvanized (ASTM A123 / ISO 1461) |
| Designation | 19W4 and custom equivalents |
Locking, lifting & documents
A trench run has to stay put under traffic and still open for cleaning. Fixings and lifting gear are sourced companion items supplied alongside our panels — honestly framed as such, quoted as line items, shipped with the order:
- Grating clips and saddle clamps — bolt-down fixing, no drilling of the panel
- Locking plates and security bolts where panels must not lift casually
- Lifting keys and lifting anchors for maintenance access along the run
- MTC EN 10204 Type 3.1, DoC per destination and factory inspection report with every shipment
Standards & compliance
Produced to Recognized Standards — Documents on Request
EN 124 class reference
Load classes A15 to D400 referenced to EN 124 as the selection language for trench and gully covers. Panels are produced to the class you specify and stated in your quote.
ASTM A123 / ISO 1461 HDG
Galvanized coating thickness checked by sampling on every galvanized batch before panels are released — one of the five stages in our QC plan.
MBG 531 weld practice
Welded trench panels produced to ANSI/NAAMM MBG 531 reference practice. Certified & tested, reports on request — documents you can verify, not a certificate wall.
Custom made
Trench Panels Cut and Banded to Your Drawings
Send the trench layout
Internal width, run length and the traffic above it — or just photos and a sketch. Drawing review is free.
Quote within 24 hours
Itemized — panels, banding, fixings, packing — 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
Send Your Trench Layout
Send your trench grating layout for a factory quote — we reply within one business day with the bar section confirmed against your trench width and load class.
- Free drawing review — width, class and fixing layout checked by the workshop
- 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 trench widths can steel trench grating span?
Bearing bars span the clear internal width of the trench and seat on the trench shoulders. Panels run up to 1.25 m wide and 6 m long, so most trench widths are covered by one strip with the joints landing on the banded panel ends. Send the internal width and the traffic above it — the bar section is confirmed in your 24-hour quote.
Do trench grating panels come banded and galvanized?
Yes. Banded edges are standard on every trench panel, and panels are hot-dip galvanized to ASTM A123 / ISO 1461 after fabrication — galvanizing is already counted inside the 5–7 working day sample window and the 15–25 working day production window. SS304 or SS316 is available for washdown and chloride duty.
How are the panels locked down and lifted for cleaning?
Panels are fixed with grating clips or bolt-down locking plates, and lifting keys or lifting anchors make the run openable for maintenance. These fixings are sourced companion items supplied alongside our panels — quoted as line items and shipped with your order.
Related pages
Related Drainage Pages
Metal Trench Drain
The system view: channel body, grating and end details on one drawing.
View page →Trench Grating
The linear trench grating line overview — formats across the range.
View page →Trench Drain Covers
Cover fundamentals: spans, locking options and lifting.
View page →Steel Trench Drain System
Full system spec: channel + grating + end caps + outlets.
View page →Metal Drain Grating
The metal drain grating band anchor — all drain contexts.
View page →Galvanized Drainage Channel
HDG channel system framing for outdoor and civil duty.
View page →