Factory-direct steel gratings & stair treads, shipped worldwide
Galvanized Drainage Channel
Handles storm water and truck wheels alike. Galv Trench built for real sites.
Itemized quote within 24 hours · Free run drawing review included
In-house weld & press lines
Grating panels and channel bodies from one workshop
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
One system, not one product
A Galvanized Steel Trench Drain Is a Run, Not a Part
A galvanized trench drain only works when every component matches: the channel width sets the grating span, the traffic sets the grating class, and the run only closes when end caps and outlets are on the same order. Specify it as one system and one drawing covers all of it.
| Component | Job in the system | What you specify | How we supply it |
|---|---|---|---|
| Channel body | Carries collected water from catchment to outlet | Internal width, depth, wall steel, fall direction, run length | Fabricated from Q235B plate in our workshop, galvanized after fabrication |
| Grating panels | Takes the traffic above while storm water passes through | Load class, bearing bar size, mesh opening, plain or serrated | Welded or press-locked panels from our in-house lines, cut and banded to the run |
| End caps | Closes the channel so water cannot escape the end of the run | Which ends close, fixing style | Sourced companion items, quoted and shipped with your order |
| Outlets & sumps | Hands the flow over to the pipe network | Outlet size and position along the run | Sourced companion items matched to your channel sections |
| Edge frames & fixings | Supports the grating in the trench and locks panels down | Frame profile, anchoring, clip pattern | Sourced companion items, fixing layout included with the order |
Grates and channel bodies come from one factory to your drawings; end caps, outlets and fixings ride along as companion line items — one purchase order closes the whole run. Not sure how to split it? Send your run layout — we will spec it inside the 24-hour quote.
How to spec a run
Four Decisions Define a Channel Run
Map the water path
Where the water collects, where it must end up, and which way the run falls. This fixes the run length and the position of every outlet and sump before any steel is cut.
Fix channel width and depth
Width and depth follow the expected flow and debris load. The channel width also sets the clear span of the grating, because bearing bars run across the channel, not along it.
Choose the grating class
Traffic decides the class: pedestrian precincts need far less panel than truck lanes. Pick bar height and spacing from our range, with close mesh where heels and wheels share the surface.
Close the system
List the end caps, outlets, sumps, edge frames and fixings as line items on the same drawing. The run then arrives complete and bolts together from one delivery.
Why system, not product
Why Specifiers Order the Galvanized Trench Drain as One System
Storm water below, truck wheels above
Open-mesh grating passes storm water and debris straight into the channel while the panel carries the traffic over it. Choose the class for the wheels, the mesh for the water — both from one spec sheet.
One drawing, one quote, one shipment
Grates and channel bodies come from one factory to your drawings, and the companion items ship with them. No middlemen between your layout and the mill — one purchase order closes the run.
Any run length, small MOQ
Panels are cut and banded to your drawings at any run length, in sections that suit your site joints. Small trial orders are welcome — prove the run before the full site order.
Applications
Where Galvanized Drainage Channels Work
Wherever collected water has to cross a traffic lane, a hot-dip galvanized run keeps the surface open for wheels and feet while the zinc keeps the wet steel protected.
Driveways & forecourts
Entrance and kerbside runs rated for car and delivery-van wheels.
Industrial yards & washdown
Yard runs that take wash water, salt spray and daily site moisture in stride.
Streets & car parks
Carriageway and car-park edge drains with grating classed for the lane.
Precincts & basements
Close-mesh covers where people walk straight over the run, indoors or out.
Specifications
Grating Class Guide and System Specifications
Class names are referenced to EN 124, the European classification for gully tops and covers. Class selection is confirmed per project and stated in your quote — documentation on request, never assumed.
Load class, referenced to EN 124
| Class | Test load | Typical location | Typical panel 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 only as a selection guide; panels are produced to the class you specify, with test reports on request.
System parameters
| Parameter | Range |
|---|---|
| Channel body | Q235B steel, fabricated to drawing, galvanized after fabrication |
| Grating bearing bars | 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 |
| Panel size | Up to 1.25 m wide, up to 6 m long |
| Grating finish | Hot-dip galvanized to ASTM A123 / ISO 1461 |
| Companion items | End caps, outlets, sumps, edge frames, fixings — sourced, quoted per run |
| Alternative materials | SS304 / SS316 for corrosive or washdown duty |
Load tables & fixing layouts → · Stainless channel variants →
Standards & compliance
Produced to Recognized Standards — Documents on Request
EN 124 class reference
Grating classes referenced to EN 124 for selection guidance only. Panels are produced to the class you specify, and the confirmed class is stated in your quote.
ASTM A123 / ISO 1461 HDG
Coating thickness is checked by sampling on every galvanized batch at our long-term galvanizing partner near the mill, before any run is released.
CE & SGS tested
Certified & tested, reports on request. Every heat arrives with its mill test certificate verified, and a DoC plus MTC EN 10204 3.1 ship with the order.
Custom made
Runs Cut and Banded to Your Drawings
Send your run layout
Run lengths, channel width, class, outlet positions — or just a site sketch and photos. Drawing review is free.
Quote within 24 hours
Itemized line by line — channel, grating, end caps, outlets, fixings — FOB Tianjin as standard, EXW or CIF on request.
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 Galvanized Trench Layout
Send your run layout for a factory quote — we reply within one business day, itemized line by line across channel, grating and companion items.
- 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 is the lead time for a galvanized drainage channel system?
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.
Do you supply the complete channel system or only the grating?
Grating panels and channel bodies are fabricated in our own workshop to your drawings. End caps, outlets, edge frames and fixings are sourced companion items, quoted as line items and shipped with the order so one delivery closes the run.
Can I start with a short trial run before a full order?
Yes — small trial orders are welcome, with panels cut to your run length. Pricing is itemized per m² or per ton in your quote; we do not publish a fixed price list. Shipped worldwide FOB Tianjin, with EXW or CIF negotiable.
Related pages
Related Drainage Pages
Galvanized Channel Drain
The single-channel product view — one HDG channel, outdoor duty.
View page →Galvanized Channel Grating
Choosing the grating that sits inside a galvanized channel run.
View page →Steel Trench Drain System
The trench system spec across all steel materials and finishes.
View page →Metal Channel Drain
Channel drain fundamentals: body formats and grating options.
View page →Trench Drain Covers
Cover fundamentals: spans, locking options and edge frames.
View page →Galvanized Steel Slot Drain
The narrow-slot alternative where an open channel is not wanted.
View page →