Falltech 7009 Manuel De L'utilisateur page 17

Figure 3 - Minimum Clear Fall Requirement: ANSI Class A Self Retracting Lanyard
2 ft
A
(0.6 m)
1 1/2 ft
B
(0.5 m)
5 ft
C
(1.5 m)
1 1/2 ft
D
(0.5 m)
10 ft
E
(3.1 m)
1. Overhead Anchorage 2. Walking/Working Surface 3. Nearest Lower Level or Obstruction
MFBH04 Rev A
Activation/Deceleration Distance
Maximum allowable length of cable or web that may payout from the SRD once
deceleration of the user has begun and after a fall event occurs
Harness Stretch and Dorsal D-Ring Shift
Combined amount of harness webbing elongation and dorsal D-ring up-shift during
entire fall event
Height of Dorsal D-Ring
Typical average height of the dorsal D-ring on a user's full body harness measured
from the walking/working surface up
Safety Factor
Added length to account for other factors such as an improperly adjusted harness,
actual worker height or worker weight
Total Minimum Clear Fall Distance Required
17
121219