Falltech 11 FT-X Web Class 1 SRL-P Manuel D'instructions page 12

Figure 6 - FT-X Minimum Required Fall Clearance for 130 to 310 lbs. (59 to 141 kg) Users
5.5.3 FT-X in Overhead, Non-Leading Edge Anchorage Application
[310 to 420 lbs. (141 to 191 kg) user]
The FT-X may be used may be used as a standard SRD in an overhead condition, in which the SRD is
installed anywhere in the allowable attachment area, which ranges from directly above the user to
level with the FBH D-ring, as shown in Figure 7.
The overhead condition minimum required fall clearance (MRFC) is calculated using four metrics,
measured from the walking-working surface: SRD Deceleration Distance, D-Ring Shift and Harness
Stretch [1 ft (0.3m)], Safety Factor [1.5 ft (0.5m)], and Swing Fall. The diagram in Figure 8 is calculated
using the performance data of the SRD and includes all four metrics listed previously to determine the
MRFC.
5.5.4 FT-X with a Non-Overhead, Non-Leading Edge Anchorage Application
[310 to 420 lbs. (141 to 191 kg) user]
The non-leading edge below D-ring condition minimum required fall clearance (MRFC) is calculated
using five metrics, measured from the walking-working surface: SRD Deceleration Distance, D-Ring
Shift and Harness Stretch [1 ft (0.3m)], Safety Factor [1.5 ft (0.5m)], Dorsal D-ring Height [5 ft (1.5m)],
and Swing Fall. Dorsal D-ring height is added to account for the below D-ring tie-off compared to the
overhead condition. The diagram in Figure 8 is calculated using the performance data of the SRD and
includes all five metrics listed previously to determine the MRFC. Below D-ring tie-off is outside the
scope of ANSI Z359 and is only allowed when no edge hazards are present. At no point during a fall
shall the lifeline be loaded over any edge.
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1
2
Figure 7 - MRFC Overhead Anchorage
.5
Y- Lateral
28.0
1 foot (0.3 m)
increments along the
X-Axis represents the
Horizontal Distance
to Anchorage the
user is working away
from the SRD
Example 1:
If the user is working 3 feet (0.9 m) away from the
SRD, and the SRD is anchored between 1 ft (0.3
m) below the user's Dorsal D-Ring or up to 2 ft
(1.1 m) above the D-Ring. Minimum required fall
clearance is 9 feet (2.7 m) including swing fall.
Example 2:
If the user needs to work 4 feet (1.2 m) away from
the SRD along the edge, and the SRD is anchored
at foot level, the minimum required fall clear-
ance is 20 feet (6.1 m) including swing fall.
X-SRD Anchorage Height
Above Dorsal D-ring
Z- Minimum Required
Fall Clearance From
Working Surface
1 foot (0.3 m) incre-
ments up the Y-Axis
represent the Elevation
of the Anchorage from
the user's Dorsal D-Ring