Components for slings - Safety - prEN 1677 for components for slings are:
Part 1: Forged steel components, Grade 10
Part 2: Forged steel lifting hooks with latch - Grade 10
Part 3: Forged steel self-locking hooks - Grade 10
Part 4: Links - Grade 10
Working Load Limit (WLL): maximum mass that a link is authorized to sustain in general lifting service.
Manufacturing Proof Force (MPF): force applied to the link during the manufacturing proof test.
Breaking Force (BF): maximum force reached during the static tensile test of the link at the end of which the link fails to retain the load.
Master Link: link forming the upper terminal of a sling by means of which the sling is attached to the hook of a crane or other lifting machine.
Intermediate Master Link: link used to connect one or two legs of a sling to a master link.
Master Link Assembly: assembly consisting of a master link together with two intermediate master links.
Lower Terminal: link, hook or other device fitted at the end of a leg of a sling, remote from the master link or upper terminal.
