Falls from a work surface must be prevented by:
1° Integrated or securely fixed rigid guardrails of appropriate strength, placed at a height of between one metre and 1.10 m and comprising at least :
a) A stop plinth of 10 to 15 cm, depending on the height chosen for the guardrails;
b) A handrail;
c) An intermediate rail at mid-height;
2° Or by any other means ensuring equivalent safety.