3.9 Guarding (fence heights, fixing instructions, safety distances, etc.)

Hard guards prevent access to danger zones and at the same time also protect (depending on the model) against projected (thrown out) objects and (depending on the model) against dangerous emissions from the machine. EN ISO 12100-2 and EN 953 Safety of machinery - Guards - General requirements for the design and construction of fixed and moveable guards contain normative requirements for construction. Extracts of the most important requirements are listed in the following sections. The height of the protective fences, openings or mesh sizes of wire screens must be dimensioned and far enough away from the point of operation that they cannot be reached with any body parts (see e.g. EN ISO 13857).