GRP Grating Stair Treads — Anti-Slip & Durable
GRP Grating Stair Treads
GRP grating stair treads replace steel and aluminium treads on industrial stairs where corrosion, slip and electrical conductivity are hazards. Molded or pultruded glass reinforced plastic treads carry a grit-top anti-slip surface as standard.
- Tread in molded or pultruded FRP grating, grit-top anti-slip standard
- Stair angle 30°–45°; rung / tread spacing 250 / 300 mm
- Non-conductive, spark-resistant, corrosion-proof
- Bolt-together fixing with SS304 / SS316 hardware — no welding
- OSHA 1910.23 access load-tested; designed to EN ISO 14122
GRP Stair Tread & Access Data
Standard configurations for GRP grating stair treads and matching access systems.
| Parameter | Standard |
|---|---|
| Tread type | Molded / pultruded FRP grating |
| Surface | Grit-top embedded silica (anti-slip) standard |
| Stair angle | 30° – 45° |
| Tread / rung spacing | 250 / 300 mm |
| Rung diameter | 25 / 32 mm |
| Concentrated rung load | 150 kg |
| Hardware | SS304 / SS316 clips and clamps |
| Handrail height | ≥1100 mm (ISO 14122-3) / 42 in (OSHA 1910.23) |
Anti-Slip Tread Surfaces
Choose the tread surface matched to the wet, oily or dry conditions on your stairs.
| Surface | Best For | Grip |
|---|---|---|
| Grit-top (silica) | Wet, oily and chemical process stairs | High — embedded silica grit |
| Concave / convex | General industrial stair treads | Standard molded profile |
| Micro-mesh | Public access, heel-friendly openings | High — small mesh profile |
| Meniscus | Light pedestrian traffic, aesthetics | Moderate |
More on anti-slip safety surfaces →.
How to Install GRP Stair Treads
Correct bearing, fixing and edge sealing preserve the designed tread load rating.
- Bearing — provide minimum 40 mm bearing on each support per ISO 14122-3 practice.
- Fixing — use SS304/SS316 clips; minimum 2 hold-down clips per beam, spaced ≤1219 mm (4 ft) on centre, minimum 4 clips per panel.
- Orientation — run pultruded bearing bars across the span, never parallel; leave a 3–5 mm thermal expansion gap at fixed supports.
- Edge sealing — seal cut tread edges with resin in corrosive service; radius corners to avoid stress points.
- Nosing — specify a contrasting grit or yellow nosing where code requires tread-edge visibility.
Full steps are in the installation guide →.
Treads as Part of a Full Access System
GRP grating stair treads are often supplied with matching handrails, caged ladders and platforms. ZeAllgrate engineers complete FRP access systems to the same standards.
Frequently Asked Questions
Grit-top embedded silica is standard for wet and oily areas; concave/convex molded profiles suit general walkways, and micro-mesh offers heel-friendly, toe-passing small openings.
Treads and access systems are engineered to OSHA 1910.23 and EN ISO 14122, with handrail height ≥1100 mm (ISO) / 42 in (OSHA), stair angle 30°–45° and grit-top anti-slip as standard.
Yes — see our FRP Ladder & Stair Systems for vertical, inclined and caged ladders, bolt-together stair strings and treads, with no welding required on site.
Secure with SS304/SS316 grating clips or clamps at every support intersection; minimum 40 mm bearing on each support and minimum 2 hold-down clips per beam, spaced ≤1219 mm (4 ft) on centre.
Yes. They are non-conductive, spark-resistant and corrosion-proof, ideal for chemical, wastewater, marine and cooling-tower stairs where steel treads rust.
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Ordering GRP Stair Treads?
Send your tread width, depth and quantity — we’ll confirm grit-top options and pricing within 24 hours.