A
Anchorage: 5’ Minimum Setback from Leading Edge and 5’ below Dorsal D-ring
C
B
D
E
F
G
1 ft
6½
ft
1½ ft
5 ft
14 ft
SRD Deceleration Distance (Worst Case Value, See Table 1B for Exact Model)
Dorsal D-Ring Shift and FBH Stretch
Combined amount of Dorsal D-ring up-shift and harness webbing elongation
during a fall event
Dorsal D-Ring Height
Height of the Dorsal D-Ring from the walking surface
Safety Factor -
Added length to account for other factors such as an improperly
adjusted harness, actual worker height or worker weight
Sub Total- Minimum Required Fall Clearance
for Below D-ring Anchorage
of SRD with No Swing Fall (sum of A thru D only)
*Additional Fall Clearance Calculation
due to Swing Fall (using Chart 1)
Total Required Fall Clearance
Including sub-total E and Swing Fall F (from Chart 1)
DSLE3A
.2
TSLE3A
.2
Figure 3A:
Calculating Minimum Required Fall Clearance SRL-LE
* If a potential Swing Fall Hazard condition is also present, additional Fall Clearance is needed in the above
calculation; see Chart 1 for calculating this additional required distance
APPENDIX A
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