IN Brief:
- The Building Safety Regulator has opened a ten-week evidence exercise on Part K and Approved Document K.
- The review covers stairs, ramps, guarding, glazing, windows, doors and barriers across English building types.
- Existing requirements remain in place, and any proposed changes would undergo a separate consultation.
The Building Safety Regulator has launched a ten-week call for evidence on Part K of England’s Building Regulations and its supporting guidance, opening a review of how buildings protect occupants and visitors against falls, collisions and impacts. The exercise covers stairs, ramps, guarding, glazing, windows, doors and vehicle barriers, but makes no immediate changes to construction requirements.
The call concerns the functional requirements of Part K and the guidance in Approved Document K, which gives examples of how those requirements may be met. BSR is seeking evidence on the effectiveness and clarity of those provisions, including their interaction with other parts of the Building Regulations. It has not published a draft change to stair dimensions, handrail geometry, glazing standards or any other requirement. The present exercise asks where evidence supports further investigation.
More than 20 years have passed since a substantial review of these provisions, according to BSR. Approved Document K addresses stair geometry, handrails, ramps, guarding, vehicle barriers, glazing subject to human impact, the visibility of glass, safe operation of windows and doors, and safe window cleaning access. Those subjects have different failure mechanisms, and the regulator is examining whether the guidance remains consistent as construction methods and building use evolve.
A staircase must combine suitable rise and going dimensions with coherent landings, sufficient headroom and appropriate handrail provision. An abrupt change between flights, a door that conflicts with a landing or a poorly arranged transition can create problems even where the individual components have been considered in isolation. BSR has published supporting stair-safety research, including work on potential guidance changes; that evidence does not constitute an announced alteration to the requirements.
Guarding presents another set of design considerations because risks differ between an internal change of level, an accessible roof edge and an opening window. Height, openings, stability and the expected users must be considered together. A barrier also needs a suitable structural connection to its supporting element; the specified geometry cannot compensate for deficient installation or an inadequate substrate. The consultation specifically invites information about approaches to fall protection in different types of building.
Glazing illustrates the interaction between different forms of protection. In a circulation route, a pane may need to resist human impact, break in a comparatively safe manner or be shielded from contact, while large transparent surfaces may need markings that make them visible. Windows that open into circulation areas introduce collision risks; safe opening, closing and cleaning raise further questions. The applicable details depend on the building type and the location of the element, rather than a single rule for all glazing.
Vehicle barriers and loading areas bring pedestrian and vehicle movements into the same regulatory field. Protection may involve the position of a barrier, the approach route and the separation between manoeuvring vehicles and building users. These features have structural implications for edge beams, fixing details and slab design, as well as consequences for how space is managed once a building is occupied. The regulator has not identified a new design load or announced any revised barrier classification in the October call.
Responsibility for complying with Building Regulations remains with the relevant dutyholders. Approved Documents provide statutory guidance, not an exclusive catalogue of permissible engineering solutions. Designers using alternative approaches still need to demonstrate compliance with the applicable functional requirements. The regulator’s review therefore raises questions about the clarity of the guidance as well as the effectiveness of the underlying regulations, without retrospectively invalidating compliant designs.
BSR’s review draws on its statutory function of keeping building safety and standards under examination. Part K covers building types across England, rather than only the higher-risk residential buildings subject to the regulator’s separate approval regime. Designers working elsewhere in the UK must refer to the applicable national building standards. The evidence exercise is therefore an England-specific regulatory review, even though many of the design and construction questions arise across the wider industry.
Responses are invited from construction professionals, researchers, building owners, managers, occupants and members of the public. Evidence of incidents, usability problems, conflicting guidance or successful solutions may help establish whether further investigation or a later consultation is warranted. Published experience needs to distinguish an inherent defect in a regulatory provision from poor installation, inadequate maintenance or non-compliance with existing guidance, since the remedies would be different.
Responses will be collected for ten weeks following the 19 October launch. BSR will assess submissions alongside supporting research before deciding whether particular provisions need further work. Any proposed changes to regulations or statutory guidance would undergo a separate consultation. Until that happens, the existing requirements and current Approved Document K continue to govern applicable building work in England.
