📝 Key Takeaways
- For modest level differences (≈ 900 mm), the Mayfair Stairlift or Westminster Equality Act Lift provide discreet, elegant access.
- Standard Sesame lifts are built to BS 6440:2011, while bespoke models are engineered to Machinery Directive Annex VIII for unique architectural settings.
- Early coordination on pit depth and retraction space avoids structural redesign.
- Choice of model depends on user independence, safety features, and environmental setting.
Introduction
In many architectural projects—particularly where stair access from car parks or courtyards meets a small level change—space and aesthetics are equally critical. Sesame Access designs hidden lifts that blend seamlessly within staircases, preserving original design intent while delivering full accessibility.
This article explains how to select between two of our most popular concealed lift systems — the Mayfair Stairlift and the Westminster Equality Act Lift — and outlines how BS 6440:2011 and the Machinery Directive Annex VIII apply to our products.
How Do BS 6440 and the Machinery Directive Apply?
All standard Sesame lifts are designed and certified to BS 6440:2011 – Powered Lifting Platforms for Use by Persons with Impaired Mobility.
However, when a project requires a bespoke configuration — for instance, non-standard rise, platform size, or architectural integration — those designs are individually assessed to conform to the Machinery Directive Annex VIII.
This ensures that even one-off engineering solutions achieve the same safety and performance standards as factory-standard products.
Choosing Between the Mayfair and Westminster Models
The transcript highlights a common design scenario: a 900 mm level change where architects want a continuous stair appearance.
- The Mayfair Stairlift features a tow-guard surrounding the platform, making it suitable for seated or wheelchair users. For safety, it’s operated via key switch by authorised users or staff, preventing standing users from accidentally activating the lift.
- The Westminster Equality Act Lift introduces automatic rising balustrades, allowing both seated and standing passengers to travel safely and independently. It is the better option where 24-hour, unsupervised access is required.
Space and Pit Requirements
- Horizontal retraction space: approximately 1.2 m for the moving stairs to retract.
- Overall footprint: around 4.5 m, including both landings.
- Pit depth: typically determined by the structural design; early engagement with the engineer ensures correct provision.
Both the Mayfair and Westminster integrate neatly within existing stair layouts once these parameters are confirmed.
Compliance and Independence
For Part M compliance, users must be able to access the lift safely and independently.
In private residential applications, key-switch operation for residents provides compliance and safety.
In communal or public environments, where any user may need access, the Westminster’s automated balustrades provide the required level of protection.
Cost and Design Guidance
The Westminster delivers enhanced safety features and flexibility but at a higher cost, reflecting its additional engineering complexity.
The Mayfair remains the elegant, cost-effective choice for supervised or residential access situations.
Both can be adapted within the BS 6440:2011 or Annex VIII compliance frameworks, depending on whether the project uses a standard or bespoke lift.
Next Steps for Architects
Email your drawings to the Sesame Access engineering team for:
- Pit and retraction verification
- Advice on model selection and compliance route (BS 6440 vs Annex VIII)
- DWG drawing packs for integration into your plans
Our engineers will review the details and advise on any constraints before design freeze.
Frequently Asked Questions
1. Which standards cover Sesame lifts?
Standard models follow BS 6440:2011. Bespoke designs are assessed under Machinery Directive Annex VIII.
2. Can the Mayfair be used by standing passengers?
No — it’s for seated or wheelchair users only, operated by key switch for safety.
3. What pit depth is required?
Typically 250–350 mm, depending on structural design.
4. Are rising balustrades mandatory?
Only where independent use by standing passengers is required (e.g. public buildings).
5. Do Sesame lifts meet Part M?
Yes. Both models, when correctly specified, meet the intent of Part M and BS 6440.
Relevant Links
- Westminster Equality Act Liftt
- Buckingham Listed Building Lift
Further Reading
Explore our related article: Accessible Lift Solutions for Embassies and Cultural Venues
External reference: UK Government Approved Document M.
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