Falltech 727630LE User Instruction Manual page 39

Non-Leading Edge Overhead Conditions
Figure 9A: Calculating Required Fall Clearance: SRL-LE
Deceleration Distance
Maximum allowable length of cable or web that may payout from the SRD
A 3½ ft
once deceleration of the user has begun and after a fall event occurs.
For work in low clearance areas, see Table 1B for Typical Performance
Dorsal D-Ring Shift and FBH Stretch
B 1 ft
Combined amount of Dorsal D-ring up-shift and harness webbing
elongation during entire fall event
Safety Factor
C 1½ ft
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
D 6 ft
for direct overhead use of SRD with No Swing Fall; sum of A, B and C only
*Additional Fall Clearance Calculation
E* ___ ft
due to Swing Fall (using Chart 9)
Total Required Fall Clearance
F ___ ft
Including sub-total D and Swing Fall E (from Chart 9)
1. Overhead Anchorage 2. Walking/Working Surface 3. Nearest Lower Level or Obstruction
* Use Chart 9 to calculate Additional Fall Clearance due to Swing Fall
APPENDIX A
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