Safety is our top priority. Therefore, we decline requests for lift tables that aim to waive the mandatory fall protection.
However, if our scissor lift table or column lift is used as a goods lift, there are specific scenarios where, under certain conditions, enclosures can be omitted.
But when does it really make sense to forgo an enclosure – and what points must absolutely be considered? In this article, you’ll get an overview of the most important aspects.
What do I need an enclosure for?
The enclosure of a goods lift serves to protect against potential hazards and plays a crucial role in minimizing the risk of accidents. In particular, two key aspects are the focus:
- Risk of falling from the upper stop: Without protective measures, people could fall from the upper stop.
- Unnoticed entry into the danger zone: If no enclosure is in place, individuals might enter the danger zone beneath the raised platform, leading to serious accidents.
If an enclosure is to be omitted at a stop, potential hazards must be eliminated through alternative safety measures. Below, we take a look at the three typical installation scenarios:
Installation scenario 1: Enclosure at all stops
The enclosure at all stops represents the classic option for simplified goods lifts. Each access door is equipped with an electromechanical lock that monitors the position of the platform:
The access doors can only be opened when the platform is securely positioned at the respective stop. This safety measure prevents falls from the upper stop and eliminates unauthorized entry into the danger zone beneath the platform.
Thanks to the full enclosure, the elevator can be equipped with an automatic control system. This allows the elevator to be called or sent with a simple push of a button. Continuous pressing of the control button is not required, significantly enhancing user convenience.
The design options for the enclosure are also quite flexible. Solutions include concrete and wooden shafts, as well as constructions made from sandwich panels or simple metal shafts. This versatility allows the enclosure to be tailored to individual requirements and structural conditions.
Installation scenario 2: Enclosure at the lower stop
This variant is used for underground lifts. Since the enclosure at the upper stop is omitted, an alternative safety solution is required to prevent fall hazards:
Underground lifts are equipped with a lid or canopy that securely seals the ceiling opening when in the lowered position, thereby eliminating the risk of falls.
During operation, the lid is raised along with the platform, creating a potential hazard zone. In this case, the responsibility for the safety of the system lies with the operator.
To adequately secure the hazard zone, the lift is controlled exclusively from the upper stop. From this vantage point, the operator has direct visual contact with the hazard area and can, if necessary, warn others to maintain a safe distance or keep them away from the danger zone.
Because the hazard zone must be actively monitored due to the moving lid, automatic operation is not possible. Instead, the underground lift operates in a "dead man's control" mode: The platform moves only as long as the operator keeps the control button pressed. As soon as the button is released, the movement stops immediately.
Installation scenario 3: Enclosure at the upper stop
By enclosing the upper stop, the risk of falling is eliminated. However, the area beneath the raised platform remains problematic, as people could unknowingly enter the danger zone – a risk that could potentially lead to serious accidents.
To minimize this risk, active monitoring by the operator is essential. The control station is located at the lower stop to ensure direct visual contact with the danger zone beneath the platform. This allows the operator to ensure that no unauthorized individuals enter the danger area and intervene promptly if necessary.
Automatic operation is also not permitted for this type of lift. Instead, the system operates in "dead man's control" mode: The platform moves only as long as the operator keeps the control button pressed.
When is an enclosure useful, and when is it not?
Whether a complete enclosure for a goods lift is useful depends on the specific application. The decision is primarily influenced by factors such as frequency of use, space constraints and individual requirements.
Installation scenario 1: Full enclosure
If the goods lift performs many trips daily, a fully enclosed elevator is almost indispensable. Automatic operation saves time and labor costs, as no constant operation is required.
Installation scenario 2: Enclosure of the lower stop
Underground lifts are often used on private properties or in city centers. They are commonly applied as:
- Car elevators: Retractable garage solutions for properties with limited space.
- Waste Elevators: Transportation of garbage bins between street level and basements.
Advantages of underground lifts:
- Space savings: Thanks to the walkable or drive-over lid, the upper stop remains fully usable.
- Seamless integration: The lift blends unobtrusively into its surroundings. On request, the lid can be covered with paving or other materials, making it nearly invisible when not in use.
Installation scenario 3: Enclosure at the upper stop
"Dead man’s" elevators are particularly suitable for infrequent use or when the movement space at the lower stop needs to be preserved:
Advantages:
- Cost savings: For low usage frequency, omitting a full enclosure can be cost-effective.
- Flexibility: The lift can be designed to be drive-over in its lowered position, for example, to allow for through traffic.
We are happy to advise you personally:
? Phone: +49 5939 96796-90
? E-mail: info@j-lifte.com
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