Factory-direct steel gratings & stair treads, shipped worldwide
A325 Grating
We produce grating to ANSI, NAAMM, EN and AS standards. Compliance docs on request.
Itemized quote within 24 hours · Free drawing review included
In-house weld & press lines
Electro-forging and press-locking 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
A325 explained
What A325 Means for Steel Grating
A325 is a structural bolt grade, not a grating product standard. It enters a grating project through the fasteners that hold panels to steel supports. We explain the honest position here, and we produce to it.
What A325 is
ASTM A325 specifies high-strength structural bolts for steel-to-steel connections — the grade commonly used to fasten grating panels, clips and toe plates to structural steel. Today the grade lives on as Grade A325 within ASTM F3125.
Scope — fixings, not the panel
A325 is a fastener context. The grating panel itself is produced to structural steel grating practice — ANSI/NAAMM MBG 531 for standard duty. The A325 grade governs the bolts and clips that fix the panels in place.
Key points for procurement
A325-grade fixings are available as sourced companion items on request, with mill test certificates. Panels, coatings and documents are quoted together, so the fixings match the panel spec in one line item.
Compliance table
A325 Requirements vs Our Produce-to Position
We produce to standards — we do not claim certifications we do not hold. Here is how each A325 project requirement maps to our manufacturing position.
| Requirement | What it asks | Our produce-to position |
|---|---|---|
| A325 structural bolt grade | High-strength bolts for steel-to-steel connections | Supplied on request as sourced companion fixings; MTC EN 10204 Type 3.1 with them |
| Grating panel geometry | Panel size, bar spacing and span per your drawings | Produced to ANSI/NAAMM MBG 531 reference practice on our in-house lines |
| Hot-dip galvanizing | Coating for outdoor fixings and panels | HDG to ASTM A123 / ISO 1461; coating thickness sampled per batch |
| Compliance documents | Traceable paperwork for the project file | DoC per ISO 17050 with every order; test reports on request |
| Third-party verification | Independent check of the agreed lot | Third-party testing arranged on request; factory audits welcome |
Not sure which combination your project needs? Send your drawings — we will spec it inside the 24-hour quote.
Load class options
Load Ratings Sit With the Panel
Even when A325 fixings lead the specification, the grating panel carries its own load rating. Tell us the span and the live load — we match bar size and spacing and issue load tables with your quote.
| Duty | Typical live load | Our produce-to approach |
|---|---|---|
| Standard duty | Pedestrian and light maintenance loads | Bars 20×3 mm upward, spacing 30 / 40 / 60 mm per MBG 531 |
| Heavy duty | Forklift and wheel traffic | Thicker bars and closer centers per MBG 532 practice |
| Per project | Live load and span given by the engineer | Load table and calculation sheet issued with your quote |
How we support you
Produce to the Standard, Documents in Hand
Confirm your standard combo
Tell us the standard and version — A325 fixings, MBG 531 panels, A123 coating. We confirm we can produce to it and quote the full document set.
Test on request
Third-party sampling and testing arranged for the agreed batch before shipping — reports issued to the project file.
DoC + MTC with the order
Every order ships with a Declaration of Conformity per ISO 17050, an MTC to EN 10204 Type 3.1 and a factory inspection report.
FAQ
Frequently Asked Questions
Can you provide compliance and DoC documents with an A325 grating order?
Yes. Every order ships with a Declaration of Conformity prepared per ISO 17050 for the destination market, an MTC to EN 10204 Type 3.1 and a factory inspection report. Bolt material certificates for A325-grade fixings are supplied on request.
What is the difference between producing to A325 and third-party certification?
Producing to a standard means panels and fixings are manufactured and inspected to that standard's requirements. Certification is a separate third-party audit program. We state what we produce to and back it with documents and on-request testing — we do not claim certifications we do not hold.
What are your sample and production timelines?
Samples ship in 5–7 working days and mass production runs 15–25 working days after drawing confirmation, both including hot-dip galvanizing. Quote within 24 hours.
Factory-direct quote
Get a Factory Quote
Contact us for standard compliance support and a factory quote for your project.
- DoC per ISO 17050 and MTC EN 10204 3.1 with every order
- Third-party testing arranged on request for the agreed batch
- 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.
Related pages
Related Standards Pages
ANSI Grating Standards
The US standards landscape — NAAMM MBG 531 and MBG 532 in context.
View page →Bar Grating Clip
Clips and fixings that pair with A325-grade bolts to hold panels.
View page →OSHA Grating
Pedestrian safety requirements for grating access and platforms.
View page →C250 Gully Grating
Load-classified covers for drainage and public works.
View page →Welded Steel Grating
The workhorse panel behind most structural specs.
View page →AS 1657 Grating
Australian fixed-platform access practice for comparison.
View page →