Kensington StairliftKey Takeaways
- Internal wheelchair lifts under 200 mm rise require precise engineering to ensure safety and usability.
- Architects should consider pit depth, trim detailing, and access to the power pack early in the design phase.
- Hydraulic scissor systems are preferred for compact internal installations due to their reliability and simple emergency-lowering capability.
- Bespoke domestic lifts should conform to the Machinery Directive Annex VIII, not BS 6440:2011, as they fall outside standard platform-lift configurations.
- Early consultation with Sesame Access engineers ensures compliance, efficiency, and aesthetic integration.
Introduction
When designing accessible homes, even a single 200 mm step can prevent wheelchair users from moving freely between rooms. Architects and designers increasingly specify small internal wheelchair lifts to provide seamless mobility while preserving interior aesthetics. This guide explains the technical and regulatory points to consider when specifying a low-rise internal lift system.
What Defines a Small Internal Wheelchair Lift?
Low-rise lifts (\u2264 200 mm) bridge a single internal threshold or split-level change. They differ from full platform lifts by requiring shallower pits and minimal lifting height. These systems often use scissor mechanisms beneath a finished tabletop or floor panel, allowing the lift to disappear into the surroundings when not in use.
Engineering and Safety Considerations
- Toe Guarding: For rises below 200 mm, BS 6440 does not mandate a fixed toe guard, but architects should still risk-assess and include protection if public or semi-public access is expected.
- Pit and Trims: Precise pit formation ensures the finished floor aligns perfectly with the lift surface. Sesame’s designs include neat 3 mm stainless-steel trims for a seamless aesthetic.
- Access to Power Pack: Always include a removable hatch or panel to reach the hydraulic power pack beneath the lift — essential for maintenance and compliance.
- Control Strategy: Hydraulic systems can use simple "hold-to-run" controls with automatic stop at the 200 mm limit, achieved either by micro-switches or sleeved rams.
Hydraulic vs Electric Drive for Internal Lifts
Hydraulic drives remain the professional choice for small-rise domestic lifts. Unlike electric worm-drive units, hydraulic lifts allow controlled manual lowering in the event of a power cut — critical where safety and reliability are paramount. They also provide smoother motion and tolerate higher load factors, making them suitable for wheelchair and attendant use.
Regulatory Compliance
For bespoke or one-off internal installations, the correct route to conformity is the Machinery Directive Annex VIII self-certification process rather than BS 6440:2011. Sesame Access engineers complete full risk assessments and CE/UKCA documentation under this directive, ensuring that every design meets performance and safety obligations without compromising architectural intent.
Design Integration Tips for Architects
- Confirm the available pit depth and cabinet space early in design.
- Allow adequate tolerance for floor finishes and surrounding skirtings.
- Consider the visual continuity of flooring: Sesame’s custom trays accept tiles, timber, or stone to match interior materials.
- Coordinate lift power supplies and control-station positions during M&E planning.
When to Specify a Bespoke Lift
For single-step or sub-200 mm internal rises, a Sesame custom scissor lift may outperform generic off-the-shelf units. Systems such as the Kensington Stairlift, Mayfair Stairlift, or Wellington Lift integrate discreetly into listed or modern interiors, providing full accessibility without visible machinery or rails.
Frequently Asked Questions
1. Can a lift under 200 mm rise be installed without a toe guard? Yes, but a risk assessment is recommended to ensure user safety depending on setting and use frequency.
2. What standards apply to bespoke domestic lifts? Custom residential lifts are assessed to the Machinery Directive Annex VIII rather than BS 6440:2011.
3. Why choose hydraulic over electric drive? Hydraulic systems offer safer emergency lowering and simpler maintenance.
4. How much space should be allowed for the machine cabinet? A small cabinet (approx. 600 × 400 mm footprint) near the lift ensures accessible servicing.
5. Can floor finishes continue over the lift platform? Yes. Sesame Access trays accept tiles, timber, or stone for perfect floor alignment.
Relevant Links
Kensington Stairlift
Wellington Lift
Related Knowledge Hub Articles
Designing Hidden Wheelchair Lifts for Heritage Interiors
Understanding the Machinery Directive Annex VIII for Bespoke Lifts
External Reference
BSI Group – Lifting Platform Safety Guidanc
Call to Action
If you’re designing a property with a single internal step or split-level, book a Teams meeting with a Sesame Project Manager for expert specification advice.(