Product
Fiberglass Grating Stair Treads and Tread Covers
A load-bearing tread and a tread cover look similar in a photograph and do completely different jobs. This page separates them, then lists what a tread order has to confirm — depth, grating direction, nosing, side support and fixing.
Stair-tread reference; tread depth, nosing and support come from the stair drawing.
Definitions
Treads, Covers and Nosing Defined
Four terms, because two of them are routinely confused and the other two decide the order.
- Load-bearing tread
- The structural step itself, supported on both sides, with its own depth, nosing and connection detail. It carries the people who use the stair.
- Tread cover
- A surface layer placed over an existing step. The step underneath continues to carry the load; the cover provides the walking surface.
- Nosing
- The front edge of the tread, which may be formed, reinforced or fitted with a separate profile. It is a design detail, not a standard accessory.
- Grating direction
- Which way the bars or mesh run relative to the tread depth. Only some orientations suit a tread, and pultruded treads depend on it entirely.
Configuration fields
FRP Stair Tread Specification Fields
The fields a tread order is built from, all of them coming from the stair drawing.
Request a Project Quote| Specification | Value |
|---|---|
| Tread depth and width | From the stair drawing Standard stair proportions are set by the building design, not by the grating supplier. |
| Grating direction | Confirmed per tread For pultruded treads the bearing bars run across the tread depth; for molded treads the mesh orientation is marked on the drawing. |
| Nosing | Formed or fitted, confirmed per tread Whether the tread has a formed front edge, a fitted nosing or a plain cut edge is part of the assembly. |
| Side support | Both sides supported A tread is supported at its ends; a platform panel cut down to size is not automatically a tread. |
| Fixing | M, L and C clips available The clip for a tread is confirmed against the stringer or bracket and the tread height. |
| Surface | Concave standard; grit considered Stairs are walked on in both directions and often in wet conditions, so the surface is chosen with the cleaning method. |
| Deflection expectation | Set by the project Stair deflection limits are usually tighter than platform limits; they are confirmed from the project specification. |
Boundaries
Three Boundaries on FRP Stair Treads
What a cut strip is not, why treads are separate, and what a cover cannot do.
- A platform panel cut into strips is not an approved tread — Cutting a platform panel to the right size produces a piece of platform panel. Whether it works as a tread depends on the supports at both ends, the depth and direction, the nosing and the project's own stair requirement.
- Stair treads are treated separately from platforms — The reference standard covers stair treads as a separate case from walkways and platforms, with their own loading and deflection expectations. Tread performance is therefore quoted from the tread detail, not from the platform table.
- A tread cover does not repair a stair — Where an existing step needs a walking surface, the step underneath still has to be structurally sound. A cover placed on a deteriorated step changes the appearance without restoring the structure.
Project inputs
What to Send for a Stair Tread Review
Six items; the stair drawing answers four of them.
- Tread or cover — State which one is required, because it changes what has to be supplied and what has to be checked.
- Stair drawing — Tread depth and width, going, rise, stringer positions and how the tread is supported at each end.
- Nosing requirement — Whether a formed edge, a fitted nosing or a plain edge is required, and any contrast or marking requirement.
- Grating direction — Which way the bars or mesh should run across the tread depth.
- Environment and load — Wet or oily conditions, cleaning method, and the number of people or loads the stair serves.
- Fixing detail — Stringer or bracket arrangement, fixing type and whether treads must be replaceable individually.
Request a quote
Send the Stair Drawing or the Tread Detail
Depth, direction and side support are the three values that decide the tread.
- Molded and pultruded grating produced in house
- Full panels or factory cut-to-size pieces
- No fixed minimum order quantity
FRP Stair Tread Questions
Can you make stair treads from your grating?
What is the difference between a tread and a tread cover?
Does the grating direction matter on a tread?
Is the nosing included?
Continue With Stair Treads
Covered grating
Continuous surfaces and cover layers, and how they differ from open mesh.
Product types and configurations
The base structures a tread can be made from.
Clips and fixings
Clip families and what has to be matched for each one.
Load and span guidance
Why tread data is not taken from platform tables.
Technical resources
The technical material behind this product page.
FRP grating products and configurations
Compare molded and pultruded panels before confirming the tread structure and support direction.
Pultruded FRP Grating
Pultruded FRP grating made from I and T bearing bars assembled with cross rods, for spans that run in one direction.
Mini Mesh FRP Grating
Double-layer mini mesh FRP grating with a small upper mesh over a wider lower mesh, commonly 19 × 19 mm over 38 × 38 mm.
Why Treads Are Their Own Product
Stairs behave differently from platforms. A platform panel usually rests on a frame and carries load spread over its area; a tread spans between two stringers, is walked on at its front edge, and is expected to stay firm under a foot placed at the nosing. The reference standard reflects that difference by treating stair treads separately from walkways and platforms, with their own loading case and tighter deflection expectations.
That is why a request to “cut a few strips off a platform panel” is treated as a new product rather than a cutting job. The strip may well be made from the same panel, but whether it works as a tread depends on the depth available between the stringers, the direction of the bars or mesh, how the front edge is formed, and how the ends are fixed. Each of those is confirmed from the stair drawing.
Nosing, Direction and Support
The nosing is the first part of a tread to wear and the part that people look for when they approach the stair. It can be formed at the factory, supplied as a separate profile, or left as a plain cut edge, and the choice affects both the appearance and how the tread is made. Where a project wants a visual contrast or a specific edge profile, say so at inquiry stage rather than after the treads are cut.
Direction matters in the same practical way. A molded tread has a mesh orientation that is marked on the drawing; a pultruded tread has bearing bars that run across the tread depth, so it cannot be rotated. And every tread is supported at both ends, which is a different condition from a panel supported on all four edges or along one span.
Covers, Cleaning and Maintenance
Where the requirement is a cover for an existing step, the conversation starts with the step: is it structurally sound, is it flat, and what is its current surface? A cover is supplied to sit on top of a sound step, not to replace one. On stairs that are wet, oily or cleaned frequently, the surface format and the cleaning method are decided together, because stairs are cleaned by hand and a coarse surface traps debris differently from an open mesh.
Treads are also inspected differently from platforms. The wear points are the nosing and the area where feet land, the fixings are short and loaded in a different direction, and a tread that has loosened is a safety observation rather than a maintenance note. Keep the stair drawing with the installation record, so a replacement tread can be made to the same detail.
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