It has been developed as two smart rescue devices constructed of steel cables. The Spider was designated for multi self-rescue from high rise buildings. It can be permanently installed into the floor or into a wall and is always instantly ready for external use, in case of any emergency or disaster.
They work on a simple principal; the user puts on a harness, attaches him or her self to the cable, and then exits out of the window. When the Spider, which is attached to the floor, senses the power of the users€™ weight, it starts to roll down the cable.
A double mechanism brake prevents the cable from being released too fast. The brake ensures that the speed of the descent will be no more than 6 feet per second, which guarantees that the users will descend safely to the ground.