Safety nets for use in construction and assembly work, e.g. as devices to catch falling persons or objects during the construction of halls and bridges, in open line construction as side protection, as anti-fall devices or devices to catch falling persons or objects on working scaffolds, as side protection for safety scaffold at roofs and in tunneling may be chosen as a technically suitable and economic solution to catch persons falling from a height. Four types of safety nets are defined: net with border rope, net attached to consoles, net attached to supporting framework, net attached to a type "gallow" support.