Factory-direct steel gratings & stair treads, shipped worldwide
Serrated Flat Bar
Serrated flat bar teeth bite wet or oily soles. Fewer slips on site.
Interlocked down to 11 / 11 mm · Serrated or plain tops · Itemized quote within 24 hours
Flat bars, interlocked in-house
Notched and press-locked on our own press 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
The flat-bar panel view
Serrated Flat Bars Are the Natural Close-Mesh Construction
Most serrated grating you see is welded: serrated bearing bars with twisted cross bars on open centers. A serrated flat bar panel is built differently — flat bars run in both directions, each one notched and interlocked, which is exactly how press-locked close mesh down to 11 / 11 mm is made. The flat profile is not a style choice; it is what makes the fine, heel-proof panel possible.
| Dimension | Serrated Flat-Bar Panel | Serrated Bar Grating | Plain-Top Close Mesh |
|---|---|---|---|
| Bar profile | Flat bars in both directions, notched and interlocked | Serrated bearing bars with twisted square or round cross bars | Flat bars in both directions, smooth tops |
| Joint principle | Mechanical press-lock — flat faces meet across their full width, no weld heat | Every intersection resistance-forged under pressure | Same press-lock interlock, smooth bar tops |
| Mesh range | Down to 11 / 11 mm centers — heel-proof openings | 30 / 40 / 60 mm centers | Down to 11 / 11 mm centers |
| Underfoot behavior | Teeth on the top edge of every flat bar — geometry designed to bite wet or oily soles | Same tooth action on a wider, more open mesh | Dependable footing on dry, clean floors |
| Default where | Hygiene floors, pedestrian decks, municipal trench and tree-pit covers, facades | Platforms, walkways and trench covers at wider spans | Hygiene and architectural floors where teeth are unnecessary |
| Our lines | In-house — press-lock machine | In-house — electro-forging line | In-house — same press-lock line |
Deciding between interlock and weld for your floor zones? Send your drawings — we will spec it inside the 24-hour quote.
How the panel is built
The Interlock Joint, the Close Mesh and the Teeth
1 · Flat-on-flat at the joint
Each flat bar is notched at every crossing and the mating bar is pressed in, so the two meet across their full face width — broad surface contact that carries fine centers without welding heat or distortion. That contact, described qualitatively, is why flat bars suit close mesh.
2 · Close mesh a heel cannot enter
Interlocking lets centers come down to 11 / 11 mm, so the openings stay smaller than a typical shoe heel. The panel still drains and vents like grating — but heels, litter and small tools stay on top, which is what pedestrian and public floors ask for.
3 · Teeth on every flat bar
Serration is a cutting step on the flat bar itself: the top edge is sheared into a repeated tooth profile before notching and pressing. In the finished panel every bar the sole crosses — in both directions on a close mesh — carries the same row of small ramps.
The honest note: serrated flat bar is not locked to one process. The same bars are also available in welded construction on our electro-forging line — the right call when a spec needs twisted cross bars or wider 30 / 40 / 60 mm centers. See the welded serrated bar grating range and the press-locked process page before you decide.
Why specify serrated flat bar
Why Buyers Specify Serrated Flat Bar From the Mill
Serrated flat bar factory, no middlemen
Panels leave our own workshop on our own press line — quotes and engineering answers come from the people who run it. Factory-direct, shipped FOB Tianjin, itemized quote on request.
Custom serrated flat bar, any size
Serrated steel flat bar cut to your sizes — panel dimensions, centers from 11 / 11 mm up, notches and banding to your drawings. Small trial orders welcome; drawing review is free.
Serrated or plain, with papers
Pick serrated or smooth tops zone by zone on the same panel range — both come with one paper trail: certified & tested, reports on request, mill test certificate to EN 10204 Type 3.1 with every order.
Applications
Where the Serrated Flat-Bar Panel Earns Its Keep
Fine, heel-proof mesh with teeth on every bar is the combination buyers reach for when floors run wet — and the same interlocked panel, plain-topped or in stainless, covers the hygiene zones beside them.
Hygiene & washdown floors
Food and chemical washdown zones: SS304 / SS316 flat-bar mesh drains the hose-down while the fine openings hold nothing underneath.
Pedestrian & public decks
Concourses, plant aisles and access floors where heels cross daily — 11 / 11 mm openings keep feet on the surface, teeth keep the grip in rain.
Municipal trench & tree pits
Sidewalk trench covers and tree-pit grids: fine mesh keeps litter and heels out, flat-bar tops read clean at street level.
Ramps, stairs & escape treads
Serrated flat-bar treads with nosing, cut to tread dimensions — the same interlocked panel, banded for step edges.
Specifications
Serrated Flat Bar Specifications
| Parameter | Range |
|---|---|
| Bar profile | Flat bars in both directions, notched and interlocked |
| Flat bar size | 20×3 mm to 100×8 mm, serrated or plain top |
| Mesh range | Down to 11 / 11 mm centers (heel-proof); wider pitches on request |
| Construction | Press-locked interlock standard; welded construction available |
| Panel width | Up to 1.25 m |
| Panel length | Up to 6 m |
| Materials | Q235B serrated steel flat bar · SS304 / SS316 stainless for washdown |
| Surface | Serrated teeth, 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
Load tables & calculators → · The press-locked process page →
Standards & compliance
What We Can Document — and What We Will Not Claim
ANSI / NAAMM MBG 531
Press-locked and welded panels produced to MBG 531 reference practice, with joint checks on our five-stage QC plan.
ASTM A123 / ISO 1461 HDG
Galvanized serrated flat bar panels get coating-thickness checks by sampling on every galvanized batch before release.
CE & SGS tested
Certified & tested, reports on request — material, joint and coating documents you can verify, not a certificate wall.
On anti-slip, stated plainly: slip behavior depends on your contaminant, your footwear and your site, so we make no slip-test or anti-slip certification claims. What we specify and check is the geometry — teeth on the top edge of every flat bar, interlocked joints, 11 / 11 mm heel-proof openings — and the paper trail behind the steel. Standards hub — market-by-market comparison →
Custom made
Custom Serrated Flat Bar, Cut and Banded to Your Drawings
Send your drawing
Panel sizes, loads, quantities — or just photos and a sketch. Mark which zones need teeth, which stay plain, and the centers you want. Drawing review is free.
Quote within 24 hours
Itemized, FOB Tianjin as standard — EXW or CIF on request. Small trial orders welcome, so one panel can prove the mesh before a full order.
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
Ask for a Serrated Flat Bar Quote Today
Ask for a serrated flat bar quote today — an itemized offer lands within 24 hours, free drawing review included, and samples are ready in 5–7 working days.
- 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 press line 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
Why do flat bars suit close mesh so well?
Because the joint is flat-on-flat. In press-locked construction each flat bar is notched and the crossing flat bar is pressed into the notch, so the two bars meet across their full face width — broad surface contact at every joint, no welding heat, no distortion. That interlock is what makes fine 11 / 11 mm heel-proof mesh practical.
Is serrated flat bar only available press-locked?
No. Press-locked interlock is where the flat profile is most at home, and the same serrated flat bars are also available in welded construction on our electro-forging line — useful when a spec calls for twisted cross bars or wider 30 / 40 / 60 mm centers. Mark the construction you need in your quote.
Do you slip-test serrated flat bar panels?
No — we make no slip-test claims. What we specify and check is geometry: teeth sheared along the top edge of every flat bar, open mesh that drains water and oil away from the sole, and 11 / 11 mm openings a heel cannot enter. Conditions differ site by site, so evaluate the surface in your own conditions; samples ship in 5–7 working days.
Related pages
Related Safety Grating Pages
Serrated Bar Grating
Serration across the welded bar-grating range — 30, 40 and 60 mm centers.
View page →Serrated Steel Bar
The serrated steel bar itself — sizes, profiles and material options.
View page →Serrated Grating
Serration fundamentals — how the tooth itself works, at any pitch.
View page →Heel-Proof Grating
The 11 / 11 mm close-mesh geometry that keeps heels on the surface.
View page →Close-Mesh Grating
The fine-mesh forming process behind every interlocked flat-bar panel.
View page →Press-Locked Grating
The press-locking process — notched bars interlocked, no weld heat.
View page →