Guardrails on Steel Mezzanine Stairs: Preventing Edge Falls

Why edge falls happen on mezzanines

Most falls from mezzanines happen at the open edges, not on the stairs themselves. A worker carrying a box, stepping back to look at a shelf or leaning over a rail can lose balance in a second, and the height is often greater than people expect.

Stairs add risk because people turn, carry loads and rush. A guardrail that is simply present is not enough; it has to be the right height, tight enough that nobody can slip through, and firmly attached to the structure.

Key guardrail features for steel stairs

A well-designed steel mezzanine stair typically includes:

• A guardrail on every open side, including the landing
• A handrail on the stair side for gripping while climbing
• Infill such as bars or mesh that stops a person or object passing through
• Smooth, rounded edges so the rail is comfortable to hold

Exact dimensions depend on the drop height and use. Your engineer confirms them on site.

Standards and what they mean in practice

In Israel, railings are generally assessed against the SI 1142 standard. It covers how railings should be designed and what they must withstand. Read it as a framework: it tells you what to check, while the specific values for your installation should be confirmed with the engineer who measures the building.

Keep a written specification and drawing for each stair. It helps with approvals, inspections and any future modification.

Materials, finishing and fixing

Steel is a strong choice for mezzanine stairs because it is rigid and can be designed for heavy use. Protection against corrosion matters in workshops where moisture, dust or chemicals are present. Hot-dip galvanizing followed by powder coating is a common way to extend service life.

Fixings are just as important as the rail itself. Anchors must suit the floor or structure they are fixed to, and loose or corroded fixings should be checked regularly.

Checking your existing mezzanine stairs

Walk through your mezzanine stairs and look at them as a worker would. Ask whether a rail is missing on any open side, whether the height feels adequate when you lean against it, and whether any section wobbles.

• Check welds, bolts and anchors for cracks or looseness
• Look for corrosion, especially at the base and in damp areas
• Confirm handrails are continuous and easy to grip

Getting guardrails made and installed

A practical process starts with photos of the stair and its surroundings, followed by an on-site measurement. A drawing and written specification are then prepared for your approval. Once approved, the parts are made in the factory, finished, and installed on site.

Sharing the intended use, load expectations and any existing damage at the start helps produce a guardrail that fits the real conditions of your workplace.

Frequently asked questions

How high should a guardrail on a mezzanine stair be?

The height depends on the drop and the applicable standard, so it should be confirmed by an engineer for your specific stair. Do not assume a generic figure without checking your site.

Is a handrail the same as a guardrail?

No. A handrail is for gripping while using the stairs, while a guardrail is a barrier that stops people falling off an open edge. Many stairs need both.

Can I add a guardrail to an existing mezzanine stair?

In many cases yes, provided the existing structure can take the added fixings and loads. An engineer should check the stair before any change is made.

How often should mezzanine stair guardrails be inspected?

Regular visual checks by staff are a good habit, with a more detailed inspection by a professional if you notice looseness, cracks or corrosion. Frequency should match how heavily the stair is used.

Common mistakes to avoid

The most common mistakes are leaving an open side without any rail and assuming a rail that looks solid is securely fixed. Fixings that have loosened or corroded can fail exactly when someone leans on them.

Our recommendation

Have a qualified engineer check the guardrail height, infill and fixings against SI 1142 and your actual loads before installation. Keep a written drawing and specification so future repairs or changes stay consistent with the original design.

Summary

Guardrails on steel mezzanine stairs prevent edge falls only when they are continuous, correctly sized and firmly fixed. Check the design against the standard and inspect your stairs regularly.

Related guides

• Industrial Steel Stairs: Safety Requirements for Workplaces
• Spiral Steel Staircases: Safety Limits and Usage Guidelines
• Commercial Steel Staircases and Occupant Safety in Busy Buildings
• Open-Riser Steel Stairs: Safety Concerns and Mitigation
• Security Features for Steel Staircases in Restricted Access Areas
• Anti-Slip Coatings for Steel Staircases: Safety Considerations
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