Falls from height remain one of the leading causes of workplace fatalities and serious injuries in the UK. For mezzanine floors, elevated platforms, and industrial staircases, properly specified and installed guardrails are not just a regulatory requirement — they are the primary line of defence against life-changing injuries. Getting the specification right requires an understanding of the applicable standards, the types of systems available, and the practical considerations of installation and cost.
The Legal Framework for Guardrails in the UK
The Work at Height Regulations 2005
These Regulations are the primary legislation governing fall prevention in UK workplaces. They require employers to:
- Avoid working at height where possible
- Where work at height is unavoidable, prevent falls using collective protective measures
- Guardrails (edge protection) are classified as a collective protective measure — the preferred solution where fall prevention is required
Under the Regulations, guardrails must be of sufficient height and strength to prevent falls and to withstand the forces likely to be imposed on them.
The Workplace (Health, Safety and Welfare) Regulations 1992
Regulation 13 specifically requires that tanks, pits, and openings in floors (including mezzanine edges) are securely fenced. The minimum guardrail height specified is 1,100 mm, with an intermediate rail such that any gap is no more than 470 mm, and a kickboard (toe board) of at least 150 mm.
Building Regulations: Part K (Protection from Falling, Collision, and Impact)
For new construction and significant refurbishment, Part K sets out minimum barrier heights and loading requirements for balustrades, guardrails, and guarding. Part K requires:
- Minimum height: 1,100 mm for industrial platforms and stairs
- Resistance to a horizontal force of at least 0.74 kN/m at the top rail
- For areas accessed by children, balustrading that is not climbable
BS EN ISO 14122 — Safety of Machinery: Permanent Means of Access
For industrial staircases, walkways, and platforms associated with machinery and industrial plant, BS EN ISO 14122 provides detailed design guidance. This four-part standard covers:
- Guardrail height and intermediate rail requirements
- Staircase dimensions and handrail configuration
- Access platform width and load ratings
- Toe board requirements
Compliance with BS EN ISO 14122 is typically required for mezzanine floors in warehouses, industrial platforms, and machinery access stairways.
Guardrail Heights and Gap Requirements
Standard requirements for UK industrial and commercial guardrails:
- Top rail height: Minimum 1,100 mm above floor level (many systems offer 1,200 mm)
- Intermediate rail: Required such that no gap exceeds 470 mm
- Toe board: Minimum 150 mm high at floor level — prevents tools, equipment, or materials rolling off the edge
- Post spacing: Typically maximum 1,500–2,000 mm centres — must be sufficient to prevent deflection under load
Types of Guardrail Systems
Steel Guardrails
Hot-rolled steel or structural hollow section (SHS) guardrails are the most widely specified system for industrial mezzanines, warehouses, and heavy-duty applications:
- Advantages: High strength, very durable, weldable for bespoke configurations, cost-effective for large installations
- Disadvantages: Heavier installation, corrosion if not properly treated (indoor vs outdoor finishes matter)
- Finish options: Hot-dip galvanised, powder coated (RAL colours available), or primer only for further finishing
- Best for: Warehouses, distribution centres, manufacturing plant, heavy industry
Aluminium Guardrails
Extruded aluminium guardrail systems are popular where aesthetics matter or where installation must be lightweight:
- Advantages: Lightweight, corrosion-free, clean aesthetic, easy to modify
- Disadvantages: Higher material cost than steel, lower impact resistance
- Best for: Retail, commercial offices, public buildings, food processing environments, coastal locations
Glass Infill Guardrails
Where natural light transmission and aesthetics are priorities, glass infill panels (toughened or laminated safety glass) are used instead of horizontal rails:
- Must use minimum Grade 1 toughened glass or laminated safety glass to BS 6206
- Frame must be designed to retain glass under impact without catastrophic opening
- Higher cost and specialist installation
- Best for commercial offices, retail, hotels, and premium developments
Modular / Bolt-Together Systems
Pre-engineered modular guardrail systems bolt together without welding, using pre-drilled posts, rails, and connectors. Key advantages:
- No hot work permits required — can be installed in occupied buildings
- Reconfigurable — can be extended, relocated, or removed
- Comes with tested and certified load ratings
- Standard bays of 1,000, 1,500, or 2,000 mm suit most mezzanine layouts
Mezzanine Guardrails: Specific Considerations
Mezzanine floor edge protection introduces additional requirements beyond basic guardrails:
Loading Gate / Pallet Gate
Where goods are loaded onto the mezzanine by pallet truck or forklift, a pallet gate or loading gate is required. This is a section of guardrail that:
- Opens to allow pallet delivery, then automatically or manually closes
- Ensures the edge is never unprotected — the gate should close on one side before the other opens (interlocked gate systems)
- Is a critical safety feature: an open pallet gate with no load present is a fall-risk hazard
Kickboards at Edges
Toe boards prevent dropped tools and materials falling from the mezzanine onto workers below. Required minimum height: 150 mm. On heavily used platforms, 200–225 mm toe boards are recommended.
Installation and Cost
Guardrail costs in the UK vary by material, configuration, and site conditions:
- Modular steel systems: £80–£150 per linear metre supplied; installation £30–£80/m depending on site
- Aluminium systems: £120–£250 per linear metre
- Glass infill: £300–£700 per linear metre
- Pallet gates: £300–£800 each
For most mezzanine installations, allow a total budget (supply and install) of £120–£250 per linear metre for a standard modular steel system.
Browse our range of guardrails and edge protection systems at Barriers Co — including modular steel mezzanine guardrails, pallet gates, aluminium handrail systems, and full toe boards for UK industrial and commercial applications.
Frequently Asked Questions
What height does a guardrail need to be in the UK?
The minimum height for industrial guardrails under UK Workplace Regulations is 1,100 mm. Building Regulations Part K and BS EN ISO 14122 also specify 1,100 mm as the minimum for industrial and workplace applications.
What is the difference between a guardrail and a handrail?
A guardrail is a protective barrier at a floor edge, platform edge, or staircase side — designed to prevent falls. A handrail is a continuous rail at staircase or ramp side, designed to provide support when walking up and down. Both may be required together at industrial staircases.
Do mezzanine guardrails need to be tested?
Guardrail systems should be designed and installed to certified load ratings. CE-marked or UKCA-marked modular systems come with performance data from manufacturer testing. For bespoke fabricated systems, a structural calculation is recommended.
How much does mezzanine guardrail cost in the UK?
Standard modular steel guardrail systems typically cost £80–£150 per metre for materials, with installation adding £30–£80/m. Total installed cost of £120–£250/m is a reasonable budget for most straightforward mezzanine edge protection projects.
What is a pallet gate and is it required?
A pallet gate (or loading gate) is a section of mezzanine guardrail that opens for pallet delivery and closes to reinstate fall protection. It is required wherever goods are loaded onto a mezzanine by forklift or pallet truck — an open edge without protection is a serious fall hazard.
Can guardrails be installed without welding?
Yes — modern modular bolt-together systems require no welding. They are ideal for installations in occupied buildings where hot work is restricted, and they can be reconfigured or relocated without specialist fabrication.