Why chose a emergency stair with retractable flight?
- Anti-intrusion and abuse
- Saving of expensive ground surface
How do the retractable flight/fold-away stairs work ?
Counterbalanced stairs can be engineered completely mechanical or with an electric counterbalanced brake system. This is perfectly doable as the JOMY stairs are made of light weight aluminum. This assure to the customer that the stairs will come down very smoothly without damage, even if a person stands beneath it, no one will be hurt.
JOMY engineers master this very well due to the many years of experience.
The lower level of a staircase can be counterbalanced to prevent improper or unauthorized use, limit use of space at ground level or for aesthetic reasons. This means that the stair can be folded away and will not interfere with daily activities. The staircase is produced from anodized aluminum profiles and can be painted in any desired RAL color. The counterbalanced stair is based on a pivoting system.
3 types of counterbalanced stairs
Prolonged Stringers System
The lower flight has two prolonged stringer sides which project over the rotation point. The counterweight is inside these stringers. Counterweights put flight in equilibrium at rotation point.
Cable and pulley system
The counterbalance is applied to the tip of the stair flight with a system of one or more stainless steel cables and pulleys. Cables connect to counterweights that move inside a vertically positioned hollow profile.
System with electro - magnetic brakes
This is an automated system where counterbalanced forces are regulated by an electro magnetic brake system.