Introduction
This article examines why bespoke design matters, what a properly engineered guarding solution looks like in practice, and why businesses across sectors such as heavy industry, food and drink production, pharmaceuticals, polymer processing, aerospace and defence in addition to warehousing operations partner with Safety Systems Technology for tailored machinery protection.
Key Takeaways
- Bespoke machine guarding design considers the machine, the operator, the workflow and the environment, not just the hazard in isolation.
- Guarding must be compliant with PUWER and, where relevant, integrated into the machine’s CE/UKCA conformity documentation.
- Off-the-shelf guarding is not always sufficient; bespoke or hybrid solutions are often required for complex or imported machinery.
- Poorly designed guards are frequently bypassed by operators, undermining both compliance and safety.
- A competent five-stage process (survey, scope, design, fabrication, installation) delivers sustainable guarding outcomes.
- Safety Systems Technology brings decades of cross-sector experience, full documentation and ISO/EN/UK standards compliance.
Few engineering decisions affect workforce safety and production throughput as directly as machinery guarding design. Yet in many manufacturing and logistics facilities, guarding is still treated as a last stage retrofit rather than a properly engineered safety measure. The result, often only exposed after an incident, is the guards have been removed, bypassed or worked around because they were never designed with the operator or workflow in mind.
Under PUWER 1998 and SMSR 2008, employers have a clear legal duty to ensure that dangerous parts of machinery are suitably and effectively guarded. Meeting that duty is not a question of simply selecting an off-the-shelf fencing system. It is a matter of assessment, design, fabrication and validation, factors at the heart of bespoke machine guarding design.
What Bespoke Machine Guarding Design Actually Means
In its simplest definition, bespoke machine guarding design is the engineering of protective barriers, enclosures, interlocked access points and associated safety controls specifically configured for a given machine or complex assembly, process and operating environment. It sits in contrast to generic modular systems, which, while useful in many standard installations, cannot always accommodate non-standard geometries, unusual access requirements, or the particular workflow patterns of a facility.
Bespoke design draws on five overlapping disciplines: mechanical engineering, electrical engineering, safety engineering, ergonomics and regulatory compliance. Each informs the other. A guard that is mechanically robust but blocks an essential inspection window will be removed. A guard that is ergonomically sound but omits a correctly specified interlock will fail compliance. True bespoke design holds all five disciplines in balance.
The Regulatory Framework: Why Guarding Cannot Be an Afterthought
UK machinery safety law places clear and non-negotiable obligations on employers and manufacturers:
- PUWER 1998 (Regulation 11) requires effective measures to prevent access to dangerous parts of machinery, with a stated hierarchy of controls beginning with fixed enclosing guards. See our blog on the danger zone in machine guarding for more on this hierarchy.
- Supply of Machinery (Safety) Regulations 2008 (SMSR) places obligations on those supplying machinery (including refurbished and imported equipment as well as businesses integrating individual machines into a single complex assembly) to meet essential health and safety requirements.
- BS EN ISO 12100 provides the overarching framework for risk assessment and risk reduction in machinery design.
- BS EN ISO 14120 governs the design and construction of fixed and movable guards.
- BS EN ISO 14119:2025 sets out updated requirements for interlocking devices associated with guards.
All the machinery guarding we design and install is engineered to comply with these standards. Where guarding forms part of new machinery or an integrated assembly, it is covered by the appropriate UKCA or CE marking and Declaration of Conformity. For retrofit work on existing equipment, we supply a full technical file demonstrating compliant design, together with certification for any bought-in safety components such as interlocks and light curtains.
Why Off-The-Shelf Isn't Always Enough
Modular guarding systems have their place. For straightforward perimeter fencing around regular-footprint machinery, they can be cost-effective and quick to deploy. However, a significant proportion of industrial machinery does not lend itself to standardised solutions, including:
- Legacy equipment with non-standard geometry or retrofitted controls.
- Imported machinery that may not fully meet UK regulatory expectations on arrival.
- High-throughput fulfilment systems with multiple pedestrian and vehicle interfaces.
- Bespoke production lines combining multiple OEM machines into a single integrated complex assembly.
- Machinery in constrained or irregular physical environments, such as mezzanines or process cells.
In these scenarios the question is rarely modular versus bespoke, but how to combine standardised components with custom-engineered elements into a coherent compliant solution. This hybrid approach is where an experienced guarding specialist adds most value.
The Safety Systems Technology Process
Safety Systems Technology works to a structured five-part process that reflects decades of practical experience across diverse industrial environments.
- Site survey and risk assessment. Undertaken in collaboration with the customer’s safety officers and maintenance teams to identify every potential hazard, access requirement and workflow constraint.
- Scope of work. A clear, proportionate specification of what guarding is required, referenced against applicable standards.
- Design. Produced for approval before any fabrication begins, ensuring the customer has full visibility of dimensions, materials, finish and interlock logic.
- Fabrication. Using commercial off-the-shelf components, customised elements, or fully bespoke manufacture as appropriate to the environment.
- Installation. Planned around the customer’s production schedule, with clear communication to safety managers and maintenance leads throughout.
Documentation is supplied at every stage, from survey findings and risk assessments through to design drawings, certification and Declaration of Conformity, giving customers a complete compliance file.
Common Compliance Failures We Encounter
In practice, the most frequent guarding shortcomings on UK sites are rarely the obvious ones. A visibly missing guard will usually be spotted on any competent inspection. The persistent problems are more subtle: guards that appear compliant at a glance but fail under technical scrutiny.
Interlock selection is a recurring example. An access gate may be fitted with a device that performs adequately in isolation but does not achieve the performance level demanded by the risk assessment. Safety distances are often assumed rather than calculated against BS EN ISO 13855, which requires the distance between hazard and protective device to reflect the machine’s actual stop time and not a nominal figure. Reach-through apertures are another common weakness; gaps that look reasonable to the eye frequently breach BS EN ISO 13857 when measured against the standard’s reach dimensions. Imported machinery compounds all of these issues, often arriving with guarding configured for the originating market rather than UK regulatory expectations.
The clearest example is the guard that is technically compliant but operationally impractical. When a guard obstructs a routine task, operators find workarounds: locks propped open, interlocks taped over, panels left unsecured. These are failings of design rather than discipline and they point to the central argument for bespoke engineering: a guard that works with the workflow is a guard that stays in place.
Why Sector Experience Matters
Machinery guarding is not a generic discipline. A guard designed for a washdown environment in food and beverage production must meet very different criteria from one installed in a steelworks, a pharmaceutical clean zone or a recycling facility. Safety Systems Technology’s experience across defence and aerospace, food and beverage, recycling, steel making, engineering workshops, medical and pharmaceutical and packaging production means design decisions are informed by real operational context, not abstract specification alone.
The sustainability of a guarding installation depends on how well it accommodates cleaning regimes, tool changes, workpiece handling and inspection access. A bespoke guard that works with the workflow supports productivity; one that does not becomes a workaround waiting to happen.
The Commercial Case for Getting Guarding Right
Machinery guarding is sometimes viewed as a pure cost centre rather than an operational investment. That perspective tends not to survive contact with the real numbers.
Well-designed guarding reduces unplanned stoppages. Safety-related incidents, however minor, trigger investigations and precautionary shutdowns, and guards that match the workflow remove the need for informal operator interventions, themselves a significant and under-recognised source of downtime. Over the lifetime of a production line, the cumulative cost of these interruptions frequently exceeds the difference between modular and bespoke solutions many times over.
The regulatory risks are just as significant. HSE enforcement following a guarding-related incident can include improvement notices, prohibition notices, fines and prosecution of duty holders, and insurers increasingly expect documentary evidence of competent design and validation when claims are disputed.
There are softer returns too. Workforces notice when safety is taken seriously, and customers auditing their supply chains increasingly ask for evidence of machinery safety compliance, particularly in regulated sectors such as food, pharmaceutical and defence. Viewed in the round, guarding is part of the operational infrastructure that allows a facility to run predictably. Visit the dedicated page for more information on SST’s guarding design services.
Conclusion
Bespoke machine guarding design is not a premium feature reserved for complex installations. It is the discipline of ensuring that every guard fitted to every machine is genuinely fit for purpose: compliant, practical, durable and aligned with how the facility actually operates. Anything less risks creating guarding that fails either its legal purpose, its operational purpose, or both.
If you would like support reviewing your current guarding arrangements, assessing imported machinery, or designing a tailored solution for new or existing equipment, the team at Safety Systems Technology is always happy to advise. A no-obligation survey is the most straightforward place to begin.
Frequently Asked Questions
How does bespoke guarding differ from modular guarding?
Modular systems use pre-manufactured panels and posts in standard configurations. Bespoke guarding is engineered specifically for the machine, geometry and workflow, and often combines modular components with custom-fabricated elements to meet both the risk assessment and the operational reality.
What documentation is supplied with an SST installation?
Customers receive site survey findings, risk assessments, design drawings, certification, UKCA/CE marking and a Declaration of Conformity. Together these form a complete compliance record suitable for HSE inspection, insurer review and internal audit.
How long does a bespoke machine guarding project typically take?
Timescales vary depending on complexity, site access and production schedules. A single machine guard may be delivered within weeks of survey; a full perimeter system for an automated line may take several months. Installation is always planned around the customer’s operational calendar to minimise disruption.
Can existing guards be upgraded rather than replaced?
In many cases, yes. Where existing guarding is structurally sound but no longer meets current standards, for example with outdated interlocks or non-compliant apertures, a targeted upgrade can be more proportionate than full replacement. A site survey will identify which approach is appropriate.
Does imported machinery need a fresh guarding assessment on arrival in the UK?
Usually yes. Machinery supplied from outside the UK may be configured to its originating market’s standards, which can differ from UK expectations on interlocks, apertures and safety distances. A competent assessment against PUWER and the relevant BS EN ISO standards is the only reliable way to confirm compliance before the equipment is put into service.
Who is responsible for machine guarding compliance?
Duties fall across both the supplier of machinery (under SMSR) and the employer operating it (under PUWER). In practice the employer carries the operational compliance burden, including reviewing inherited, modified or imported equipment to ensure current standards are met.
