4
C
OMPATIBLE
C
ONNECTIONS
I
NCOMPATIBLE
C
ONNECTIONS
When more than one personal fall arrest system is attached to the anchorage, the strength in (A) or
(B) must be multiplied by the number of personal fall arrest systems attached to the anchorage.
CONNECTION REQUIREMENTS
C
OMPATIBILITY
L
IMITATIONS
All connecting subsystems must only be coupled to compatible connectors. OSHA 29 CFR 1910.140
and 1926.502 prohibit snap hooks from being engaged to certain objects unless two requirements are
met: snap hook must be a locking type and must be “designed for” making such a connection. Under
OSHA “designed for” means that the manufacturer of the snap hook specifi cally designed the snap
hook to be used to connect to the equipment in question.
The following connections must be avoided because they can result in rollout* when a non-locking
snap hook is used:
•
Direct connection of a snap hook to horizontal lifeline.
•
Two (or more) snap hooks connected to one D-ring.
•
Two snap hooks connected to each other.
•
A snap hook connected back on its integral lanyard.
•
A snap hook connected to a webbing loop or webbing lanyard.
•
Improper dimensions of the D-ring, rebar, or other connection point in relation to the snap
hook dimensions that would allow the snap hook keeper to be depressed by a turning motion
of the snap hook.
*Rollout:
A process by which a snap hook or carabiner unintentionally disengages from another
connector or object to which it is coupled.
NO!
NO!
NO!
NO!
NO!
NO!
NO!
NO!
