Expanded Metal Stair Treads for Industrial Sites

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Expanded metal stair treads are steel sheets cut and stretched into an open diamond mesh, giving a non-slip, self-draining walking surface that suits industrial access stairs. They are lighter than solid plate, let dust and water fall through, and can be hot-dip galvanized or powder coated for harsh plant environments.

What expanded metal treads are

Expanded metal is made by slitting a steel sheet and stretching it into an open diamond pattern, so no material is removed. The result is a grip-friendly surface that is much lighter than solid plate of the same strength. For plant operators, this means a stair that is easier to handle during fabrication and installation, and that does not add unnecessary weight to the supporting structure.

The mesh is available in different strand thicknesses and opening sizes. Your choice depends on the load the stair carries, how often it is used, and whether small tools or parts might fall through.

Why open mesh suits industrial sites

On a working floor, oil, water, dust and wash-down liquids collect on steps. An open surface lets these pass through instead of pooling, which keeps footing safer. Light also passes through the mesh, so a lower landing or a stair below stays visible, and there is less of the enclosed feeling that solid treads can create in tight spaces.

Self-draining, so less standing liquid on the step
Lighter than solid plate for the same footprint
Visibility through the surface for stairs with lower levels

Choosing the right mesh and thickness

Mesh size should be small enough that a boot toe or narrow tool cannot slip through, yet open enough to drain well. Strand thickness and the width of the tread affect stiffness, and the span between stringers affects how much the tread will flex. We check these against the expected traffic and any loads the stair must carry, then confirm the final spec with the engineer.

For railings and guarding that connect to these stairs, we refer to the Israeli railing standard SI 1142. Exact dimensional values are confirmed during the engineering review rather than assumed from memory.

Finishes for harsh plant conditions

Finish is often what decides how long a stair lasts. Hot-dip galvanizing gives strong corrosion protection for steel that will see moisture, chemicals or outdoor weather, because the zinc coating covers cut edges and the inside of the mesh. Powder coating adds a colored, durable surface and can be chosen for safety marking or to match a site color code.

Hot-dip galvanizing for wet or corrosive areas
Powder coating for color and added surface protection
Check whether the stair will be exposed to washdown

Fitting treads to the stair structure

Treads are only as good as the frame they sit on. The tread edges need proper support on the stringers or angles, with fixings that resist vibration. Nosing and edge detail matter because a sharp, unfinished edge is a common source of complaints. The stair should be measured on site so each tread matches the actual rise, going and width, not the drawing alone.

Fabrication happens in our factory, and the stair is installed once the finish is complete, so the surface is not damaged by site handling.

Ordering and approval steps

A typical order starts with photos of the existing access stair or the planned route, followed by an on-site measurement. We then prepare a drawing and a written specification covering mesh type, thickness, finish, and structural details. Once you approve the specification, production begins in the factory. Clear answers at the drawing stage prevent most changes later, so review the layout, handrail position and tread dimensions carefully before signing off.

Frequently asked questions

Are expanded metal treads slippery when wet?

Generally no, because the open mesh lets water drain through instead of forming a film on the surface. The grip comes from the raised edges of the expanded pattern, which is one reason they are popular for plant access.

Which finish is better, galvanizing or powder coating?

It depends on the environment. Hot-dip galvanizing is the stronger choice for wet, corrosive or outdoor areas, while powder coating adds color and protection and is often chosen for indoor or marked-zone stairs.

Can expanded metal treads be used with a steel stair structure?

Yes, they are commonly fitted to steel stringers or angles designed for the load and span. The support structure is designed alongside the treads so the stair meets the required strength and stiffness.

Do I need an engineer to check the design?

For industrial stairs, the final tread size, support and railing details should be checked by an engineer. We confirm exact values during the review rather than relying on general figures.

Common mistakes to avoid

A common mistake is choosing a mesh size that is too large, letting tools or boot toes slip through, or ordering without checking the finish against the site's wash-down and corrosion conditions.

Our recommendation

Measure the stair on site before finalizing, specify hot-dip galvanizing wherever moisture or chemicals are present, and review the tread and handrail layout on the drawing before approving production.

Summary

Expanded metal stair treads give plant operators a light, self-draining and grip-friendly access stair when the mesh, thickness and finish are matched to the site.

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