Falltech Arc Flash Mini Pro Class 1 SRL-P Manuel De L'utilisateur page 12

5.5.3 Arc Flash Mini Pro in Overhead, Non-Leading Edge Anchorage Application
[130 to 420 lbs. (59 to 191 kg) user]
The Arc Flash Mini Pro 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 Arc Flash Mini Pro with a Non-Overhead, Non-Leading Edge Anchorage Application
[130 to 420 lbs. (59 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.
Front
50mm
ARC FLASH MINI PRO 420lb
Figure 8 - Arc Flash Mini Pro Minimum Required Fall Clearance for 310 to 420 lbs. (141 to 191 kg) Users
Horizontal Distance to Anchorage
from Dorsal D-Ring
7ft 6ft 5ft 4ft 3ft
7ft
6ft
5ft
4ft
3ft
2ft
1
1ft
0ft
1ft
2ft
3ft
21ft
4ft
5ft
2
Minimum Required Fall Clearance
Indicated in gure above
MINIMUM REQUIRED FALL CLEARANCE FOR
Below D-ring tie-o (orange region) is outside
the scope of ANSI Z359 and is only allowed
when no edge hazards are present
12
See instruction manual for additional
2
Figure 7 - MRFC Overhead Anchorage
.5
Y- Lateral
28.0
2ft 1ft 0ft 1ft 2ft 3ft 4ft
8ft
11ft
15ft
18ft
310-420 LB USER
information
3
X-SRD Anchorage Height
Above Dorsal D-ring
Z- Minimum Required
Fall Clearance From
5ft 6ft 7ft
increments along the
X-Axis represents the
Horizontal Distance
to Anchorage the
user is working away
Z- Minimum Required
Fall Clearance From
Working Surface
Example 1:
If the user is working 3 feet (0.9 m) away from
the SRD, and the SRD is anchored between 1 foot
and 2 foot above user's Dorsal D-Ring. Minimum
required fall clearance is 11 feet (3.4 m) including
swing fall.
24ft
Example 2:
If the user needs to work 4 feet (1.2 m) away from
the SRD and the SRD is anchored at foot level
with no edge exposure, the minimum required
fall clearance is 24 feet (7.3 m) including swing
fall.
Working Surface
1 foot (0.3 m)
increments up the Y-Axis
represent the Elevation
of the Anchorage from
the user's Dorsal D-Ring
from the SRD
4
Back
Figure 4 - MRFC Non-Overhead An
1 foot (0.3 m)
Z- Minimum Required
Fall Clearance From
Working Surface