Fall Clearance - DBI SALA Delta Vest Manual Del Usuario

E. CONTROLLED DESCENT: For controlled descent
applications, harnesses equipped with a single
sternal level D-ring, one or two frontal mounted
D-rings, or a pair of connectors originating below
the waist (such as a seat sling) may be used for
connection to a descender or evacuation system
(reference in Z259.10 in Canada).
F. RESTRAINT: The full body harness is used as a component
of a restraint system to prevent the user from reaching a fall
hazard. Restraint systems typically include a full body harness
and a lanyard or restraint line.
1.2 LIMITATIONS: Consider the following application limitations
before using this equipment:
A. CAPACITY: These full body harnesses are designed for use
by persons with a combined weight (clothing, tools, etc.) of no
more than 420 lbs. Make sure all of the components in your
system are rated to a capacity appropriate to your application
B. FREE FALL: Personal fall arrest systems used with this
equipment must be rigged to limit the free fall to 6 feet (1.8
M) (ANSI Z359.1). Restraint systems must be rigged so that
no vertical free fall is possible. Work positioning systems must
be rigged so that free fall is limited to 2 feet (.6 m) or less.
Personnel riding systems must be rigged so that no vertical
free fall is possible. Climbing systems must be rigged so that
free fall is limited to 18 in. (.46 cm) or less. Rescue systems
must be rigged so that no vertical free fall is possible. See
subsystem manufacturer's instructions for more information.
C. FALL CLEARANCE: See Figure 6. There must be suffi cient
clearance below the user to arrest a fall before the user strikes
the ground or other obstruction. The clearance required is
dependent on the following factors:
• Elevation of anchorage
• Connecting subsystem length
• Deceleration distance
• Free fall distance
• Worker height
• Movement of harness attachment element
See subsystem manufacturer's instructions for more information.
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