DS/ISO 13857:2019

Safety of machinery – Safety distances to prevent hazard zones being reached by upper and lower limbs

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This International Standard establishes values for safety distances in both industrial and non-industrial
environments to prevent machinery hazard zones being reached. The safety distances are appropriate
for protective structures. It also gives information about distances to impede free access by the lower
limbs (see 4.3).
This International Standard covers people of 14 years and older (the 5th percentile stature of 14 year
olds is approximately 1 400 mm). In addition, for upper limbs only, it provides information for children
older than 3 years (5th percentile stature of 3 year olds is approximately 900 mm) where reaching
through openings needs to be addressed.
NOTE 1 – Data for preventing lower limb access for children is not considered.
The distances apply when adequate safety can be achieved by distance alone. Because safety distances
depend on size, there will be some people of extreme dimensions who will be able to reach hazard
zones even when the requirements of this International Standard are complied with.
NOTE 2 – These safety distances will not provide sufficient protection against certain hazards, for example,
radiation and emission of substances. For such hazards, additional or other measures need to be taken.
The clauses of the International Standard covering lower limbs apply when access by the upper limbs is
not foreseeable according to the risk assessment.
The safety distances are intended to protect those persons trying to reach hazard zones under the
conditions specified (see 4.1.1).
NOTE 3 – This International Standard is not intended to provide measures against reaching a hazard zone by
climbing over (see ISO 14120:2015, 5.18).

Number of pages: 30

Published: 2019-11-05

Date of approval: 2019-11-04

International relationships : ISO 13857:2019 IDT

ICS: 13.110 - Safety of machinery

Item number: M335378



  • ISO/TC 199
  • ISO/TC 199/WG 6

Danish committee