Safety nets are collective protection systems intended to limit the height of the fall, and must comply with a series of conditions and characteristics which are described below:
It must have the necessary surface to ensure effective protection of the danger zone, covering all possible gaps and leaving no gaps.
It has to withstand the impact force of a man falling from a maximum admissible height (approximately two floors) and must do so with an acceptable safety coefficient so that it does not break.
It must have enough flexibility to make a bag and, in this way, retain the injured person as if it were a sack.
It must be resistant to atmospheric agents such as sun or rain.
There are two types of safety nets, prevention or vertical nets which prevent people from falling and protection or collection nets, which limit people from falling.
Within these there are several modes of use, on the one hand prevention networks can be classified into 3 classes of networks:
- Verticals used as railings in gaps and openings.
- Vertical used in facades with or without gallows.
- Horizontal commonly used in roof protection.
On the other hand, the protection nets that limit the fall of people can be of 2 kinds of nets:
- Vertical prevention in gaps.
- Vertical prevention in openings.
These last modalities can be used as a railing to protect the edges of slabs or around the perimeter of a hole, being also used to protect facades.
Technically speaking, the different types of networks can be differentiated according to the following nomenclature:
- Type A
- Type B.
- S-type network.
- T-type network.
- U type
- Type V
- Vertical Closing Net
- Perona-type net (Protection of work stairs)