Industrial Stair Treads — Steel & FRP Grating Treads
Stair treads are one of the most safety-critical items on any industrial stairway, and they are almost never an off-the-shelf purchase. Every stringer spacing, nosing detail, and bolt-hole pattern comes from the project drawings — which is exactly how GoGrating builds them. As a factory-direct fabricator in Anping, Hebei, the wire-mesh and grating capital that produces over 70% of China's output, we cut, weld, and finish steel grating treads and FRP grating treads to your specification, not to a stock SKU list.
Our treads ship to EPC contractors, procurement engineers, and importers across the Middle East, Southeast Asia, Europe, Australia, and Latin America, with our FRP grating line also serving North American buyers. Send your stair drawings or CAD files through our Request a Quote page and we will return a detailed fabrication takeoff.
What Are Grating Stair Treads?
A grating stair tread is a panel of welded steel bar grating or molded/pultruded FRP grating cut to tread size and finished with two functional details: end plates (carrier plates) welded or bonded to each side and pre-punched for bolting to the stair stringer, and a nosing along the leading edge — typically angled checker plate on steel treads or an abrasive grit strip on FRP — that gives the foot a defined, high-visibility, anti-slip edge.
The open-grid surface drains water, oil, mud, and snow straight through, which is why grating treads are the default choice on platforms, mezzanines, towers, and plant stairways. See our applications overview for typical use cases.
GoGrating fabricates treads to YB/T 4001.1 (the Chinese steel grating standard) and ANSI/NAAMM MBG 531, with hot-dip galvanizing per ASTM A123, under an ISO 9001 quality system with CE marking available. Treads built to these standards, with serrated or grit anti-slip surfaces and proper nosing, support compliance with OSHA walking-working surface requirements — your project engineer confirms suitability against the governing code.
Types of Stair Treads
Welded steel grating treads are the workhorse: carbon steel bearing bars welded to twisted or plain cross bars, supplied serrated (notched bearing bars for maximum grip in wet, oily, or icy service) or plain/smooth (easier underfoot for frequent pedestrian traffic and easier to clean). Finish options are hot-dip galvanized to ASTM A123 for outdoor and coastal projects, painted or untreated for indoor or to-be-coated structures, and stainless 304/316 for food, pharmaceutical, and marine environments.
FRP grating treads are cut from molded or pultruded fiberglass grating in orthophthalic, isophthalic, or vinyl ester resin systems, with a gritted anti-slip top and grit nosing. They are the right call where corrosion, electrical conductivity, or weight rules out steel — chemical plants, wastewater treatment, offshore, and marine docks. Covered (solid-top) treads, in steel checker plate or FRP covered grating, suit areas where falling objects or visual screening matter more than drainage.
Nosing itself is a choice: angled checker-plate nosing, abrasive (grit-filled) nosing for the harshest slip conditions, or no nosing where treads land flush into a framed stair. We fabricate all of the above against your drawing.
Stair Tread Specifications
Because treads are custom-fabricated, we quote against spec ranges rather than fixed sizes. Bearing bars run from 20×3 mm up to 100×9 mm (treads most commonly use 25×3 to 65×5 mm), on 30 mm or 40 mm metric pitch or the NAAMM 19-space and 15-space series. Tread widths typically fall between 150 and 305 mm with lengths cut to your stringer span; end-plate thickness and bolt-hole patterns follow your connection detail.
We do not publish generic load figures — the safe load of a tread depends on bearing bar section, span, and the duty defined in YB/T 4001.1 or ANSI/NAAMM MBG 531. Tell us your span and required loading and we will provide engineered load tables for the exact section proposed. Send drawings, CAD files, or even a marked-up site sketch via Request a Quote and our engineers will respond with a full specification and fabrication proposal.
| Bearing bar size | 20×3 mm to 100×9 mm (treads commonly 25×3 – 65×5 mm) |
| Bearing bar pitch | 30 mm / 40 mm metric; NAAMM 19-space and 15-space series |
| Cross bar pitch | 50 mm / 100 mm (2" / 4") |
| Tread width | 150 – 305 mm typical, cut to order |
| Tread length | Cut to stringer span per drawing |
| Anti-slip surface | Serrated bearing bars (steel) / grit top (FRP) / plain |
| Nosing | Checker-plate angled nosing, abrasive grit nosing, or plain edge |
| End plates | Pre-punched carrier plates, bolt-hole pattern to spec |
| Surface treatment | Hot-dip galvanized (ASTM A123) / painted / untreated / stainless 304 & 316 |
| Standards | YB/T 4001.1, ANSI/NAAMM MBG 531, ISO 9001, CE |
- Serrated steel or grit-top FRP anti-slip surfaces
- Pre-punched end plates for bolt-on installation
- Checker-plate or abrasive angled nosing
- Hot-dip galvanized to ASTM A123, painted, or stainless 304/316
- Fabricated to YB/T 4001.1 and ANSI/NAAMM MBG 531
- Made to your drawings — CAD files welcome
Frequently Asked Questions
Can you fabricate stair treads to our project drawings?
Yes — that is our standard workflow. Send stair drawings, CAD/DWG files, or a dimensioned sketch showing tread width, length, stringer connection, and nosing detail through our Request a Quote page. Our engineers confirm the specification, propose a bearing bar section, and provide engineered load tables before fabrication.
Is there a minimum order quantity for grating stair treads?
There is no fixed MOQ — treads are produced per project bill of quantities, and they commonly ship together with steel or FRP grating panels in mixed-container orders. For small trial orders from distributors, contact us with your quantities and we will confirm feasibility and lead time.
What is the typical lead time for custom stair treads?
Most tread orders ship within roughly 15–30 days after drawing approval, depending on quantity, bearing bar section, and surface treatment — hot-dip galvanizing adds processing time versus untreated or painted finish. We confirm a firm production schedule with every quotation.
Are your stair treads OSHA compliant?
Our treads are fabricated to YB/T 4001.1 and ANSI/NAAMM MBG 531 with serrated or grit anti-slip surfaces and defined nosing — features that support OSHA walking-working surface compliance. Final code compliance depends on the stair design as a whole, so your project engineer should verify against the governing regulations.