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MCS30 Rev B
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4.2.3
Dual Line – Winch and SRD/Alternate PFAS - Entry/Egress Using Ladder
When a confined space has an existing ladder but the attendant is unable to maintain a taut winch line as the entrant descends and
ascends from the confined space, it is possible to use a regular SRD or Fall Arrestor Connector Subsystem (FACSS) to provide protection
from impacting and overloading the winch during a fall event.
In this case the PFAS provides fall protection as the worker freely moves vertically, and the winch provides backup as the emergency
retrieval device from the confined space. See Figure 4.
4.2.4
Dual Line – Winch and 3-Way – Entry/Egress Using a Winch
When no alternate method of entry/egress (such as a ladder) exists the confined space entrant will be suspended, raised and lowered
with the winch line attached to a shoulder yoke or sternal D-Ring of a Full Body Harness. An SRL-R is then attached to the dorsal
D-ring of the Full Body Harness to provide fall arrest and emergency retrieval. Suspended workers are required to have a backup system
to their primary means of entry/egress that will limit fall forces to the body and provide emergency retrieval in the event of a winch
malfunction. See Figure 5.
DUCSC1.
1
052715
052715
DUC
SC4.
1
051415
DUCSC1.
1
052715
052715
DUC
SC4.
1
051415
Figure 4
Dual Line – Winch and SRD/Alternate PFAS
Entry/Egress Using Ladder
Figure 5
Dual Line – Winch and 3-Way
Entry/Egress Using a Winch
