Factory-direct steel gratings & stair treads, shipped worldwide
Grating Plain
Need flat bar grating data? Factory engineers reply in 24 hours.
Plain (unserrated) tops · Q235B or stainless · itemized quote within 24 hours
Grating plain, made in-house
Smooth or serrated tops on our own weld and press lines
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
Surface comparison
Plain Top vs Serrated Top vs Close-Mesh Plain
"Grating plain" is a surface specification, not a separate product: the same flat bar panels, the same spans and loads, with a smooth top instead of teeth. Here is where each surface earns its place — stated honestly.
| Dimension | Plain Top | Serrated Top | Close-Mesh Plain |
|---|---|---|---|
| Top profile | Smooth, flat bearing-bar surface — the classic flat bar grating top | Teeth formed along the top of each bearing bar | Smooth tops, openings down to 11 / 11 mm |
| Underfoot behavior | Dependable footing on dry, clean floors | The conventional pick where footing is wet or oily | Heel-proof — suited to dress shoes and pedestrian decks |
| Cleanability | Hose-downs and sweeps clear the smooth top — no crevices to hold soil | Teeth need brushing; residue can sit between them | Smooth bars clean fast; fine openings can hold grit |
| Where the surface wins | Hygiene floors, stainless interiors, snow regions, dry plant floors | Wet or oily zones: wash bays, grease areas, outdoor stairs | Trench covers, tree pits, facades, public walkways |
| Formats & spacing | Welded at 30 / 40 / 60 mm centers, or press-locked | Serrated tops on welded panels and stair treads | Press-locked construction |
| Our supply | In-house — both weld and press lines | In-house — same lines, serrated bar surface | In-house — press-lock machine |
Not sure which surface your floors need? Send your drawings — we will spec it inside the 24-hour quote.
Surface & finish
One Geometry, Two Tops, Three Finishes
1 · Plain top
The smooth original: the full bar cross-section carries the load, and the walking surface stays flat so water, dust and snow slide or sweep off instead of lodging.
2 · Serrated top
The honest alternative when floors stay wet or oily: teeth engage boot soles by geometry. We make both surfaces from the same panel range — see serrated grating.
3 · Finishes on plain tops
Black mill finish for painting on site, hot-dip galvanized to ASTM A123 / ISO 1461 via our certified partner, or SS304 / SS316 mill finish where the smooth top is the point.
Why specify plain
Why Engineers Specify Plain Flat Bar Grating
Full flat bar grating specs
Plain tops run across the whole size range — bearing bars from 20×3 mm to 100×8 mm at 30, 40 or 60 mm centers, panels up to 1.25 m × 6 m, welded or press-locked. Free flat bar grating help from the engineers who make them.
Custom flat bar grating
Stock designations or fully custom panels — cut and banded to your drawings with the surface you mark on them. Drawing review is free and happens inside the 24-hour quote.
Materials with papers
Q235B carbon steel or SS304 / SS316, every heat checked at goods-in. Certified & tested, reports on request — mill test certificates to EN 10204 Type 3.1 come with every order.
Where the smooth top wins
Where Plain Beats Serrated
Serration is one answer to one problem — footing on wet steel. Everywhere else, the smooth top of non serrated grating does the job better, and usually for less work in cleaning.
Hygiene & washdown floors
No crevices to hold soil — a hose or squeegee clears the whole surface. The default surface for food, beverage and pharmaceutical flooring.
Stainless interiors
SS304 / SS316 platforms and mezzanines keep the smooth mill finish visible — teeth would read as industrial even indoors.
Debris slide-off
In dry plants, dust and grit slide or sweep off a flat top instead of settling between teeth — less brushing, cleaner walking lines.
Snow & ice regions
Smooth tops shed snow and melt water through the mesh; serrations can pack with ice where plowing is infrequent.
The honest exception: where the floor stays wet or oily, serrated grating is the conventional choice, and we supply it from the same panel range — see the serrated surface before you decide.
Specifications
Flat Bar Grating Specifications — Plain Top
| Parameter | Range |
|---|---|
| Bearing bar | 20×3 mm to 100×8 mm, plain (smooth) top |
| Bar spacing | 30 / 40 / 60 mm centers |
| Cross bar | Twisted square or round, per specification |
| Panel width | Up to 1.25 m |
| Panel length | Up to 6 m |
| Materials | Q235B carbon steel · SS304 / SS316 stainless |
| Surface options | Black (mill finish) · hot-dip galvanized (ASTM A123 / ISO 1461) · stainless mill finish |
| Designations | Plain top across stock 19W4-family specs and custom panels |
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
Load tables & calculators → · Plain steel grating — the material view →
Standards & compliance
Produced to Recognized Standards — Documents on Request
ANSI / NAAMM MBG 531
Plain-top welded panels produced to MBG 531 reference practice, with joint inspection on our five-stage QC plan.
ASTM A123 / ISO 1461 HDG
Galvanized plain tops get coating-thickness checks by sampling on every 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
Custom Flat Bar Grating, Cut and Banded to Your Drawings
Send your drawing
Panel sizes, bar spacing, surface (plain or serrated), quantities — or just photos 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 Factory Quote
Quote your flat bar grating today — factory engineers reply within 24 hours with an itemized, FOB Tianjin quote and free drawing review.
- 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 plain mean in steel grating?
Plain means the bearing bars carry a smooth, flat top with no serrated teeth formed into them. Everything underneath is the same grating geometry: bearing bars from 20×3 mm to 100×8 mm at 30, 40 or 60 mm centers, in welded or press-locked construction.
When should I choose plain grating instead of serrated?
Choose plain tops for hygiene and washdown floors, stainless plant interiors, dry areas where dust should slide off, and snow regions where serrations can pack with ice. For wet or oily zones, serrated grating is the conventional choice — both surfaces are made from the same panel range.
What are the lead time and order terms for plain grating?
Samples ship in 5–7 working days and mass production runs 15–25 working days after drawing confirmation, hot-dip galvanizing included. Quotes are itemized within 24 hours, FOB Tianjin as standard, and small trial orders are welcome.
Related pages
Related Grating Pages
Plain Steel Grating
The same smooth-top panels from the material side — Q235B, galvanized, stainless.
View page →Serrated Grating
Toothed tops for wet, oily or icy zones — the honest alternative surface.
View page →Bearing Bar Grating
Bar heights, thicknesses and centers — the geometry under any top surface.
View page →Walkway Grating
Walkway duty — where plain tops meet span, load and drainage needs.
View page →Twisted Bar Grating
Twisted square cross bars — the standard reticuline option behind plain tops.
View page →I-Bar Grating
I-bar designations compared with flat bar tops — weight and stiffness trade-offs.
View page →