8
3.3 REQUIREMENTS FOR PERSONAL FALL ARREST SYSTEMS
(PFAS):
PFAS used with the Digital Winch and support structure
must meet applicable OSHA requirements.
•
The PFAS should be rigged to minimize any potential free
fall and never allow a free fall greater than 6 ft. (1.8 m).
The PFAS used with this equipment are required to include
a full body harness as the body support component. PFASs
that incorporate full body harnesses must maintain fall arrest
forces below 1,800 lbs. (8.0 kN) and arrest the fall within
42 in. (1.1 m). Body belts, unless incorporated into a full body
harness, are not recommended for use with this equipment.
A typical PFAS includes a full body harness, connecting
subsystem or component (self retracting lifeline or lifeline and
rope grab), and the necessary connectors to couple the system
together.
•
Anchorages selected for PFAS must sustain static loads,
applied in the directions permitted by the PFAS, of at least;
(A) 3,600 lbs. (16.0 kN) when certi
fi
cation exists (see ANSI
Z359.1 for certi
fi
cation de
fi
nition), or (B) 5,000 lbs. (22.2kN)
in the absence of certi
fi
cation. When more than one PFAS is
attached to an anchorage, the anchorage strengths set forth
in (A) and (B) must be multiplied by the number of PFAS
attached to the anchorage.
Per OSHA 1926.500 and 1910.66: Anchorages used for
attachment of a PFAS shall be independent of any anchorage
being used to support or suspend platforms, and must support
at least 5,000 lbs. (22.2kN) per user attached, or be designed,
and used as part of a complete PFAS which maintains a safety
factor of at least two, and is supervised by a quali
fi
ed person.
WARNING:
Read and follow manufacturer’s instructions for the
personal fall arrest equipment selected for use with the winch and
support structure.
IMPORTANT:
Body belts are not allowed for free fall situations. Body
belts increase the risk of injury during fall arrest in comparison to a full
body harness. Limited suspension time and the potential for improperly
wearing a body belt may result in added danger to the user’s health.
3.4 INSTALLATION OF WINCH TO DAVIT ARM OR TRIPOD:
A. LOAD REQUIREMENTS:
Figure 4 illustrates the winch
mounted to the support structure and the load requirements.
The mounting bracket must support the loads specified.
B. GEOMETRIC REQUIREMENTS:
Refer to the support structure
manufacturer’s instructions for geometric requirements.
Installations of the winch to support structures other than those
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