6
Working Level
Lower Level or Obstruction
Self Retracting
Lifeline
Maximum Arrest Distance
(per ANSI Z359.14 Class A)
2 ft.
(0.6 m)
Safety Factor
2 ft.
(0.6 m)
1 ft.
(0.31 m) Harness Stretch
To Worker’s Back D-Ring
5 ft.
(1.5 m)
Total Estimated
Distance
10 ft .
(3.0 m)
Estimated Clearance
Required
5 ft .
(1.5 m)
Working Level
Lower Level or Obstruction
Self Retracting
Lifeline
Maximum Arrest Distance
(per ANSI Z359.14 Class B)
4.5 ft.
(1.4 m)
Safety Factor
2 ft.
(0.6 m)
1 ft.
(0.31 m) Harness Stretch
To Worker’s Back D-Ring
5 ft.
(1.5 m)
Total Estimated
Distance
12.5 ft .
(3.81 m)
Estimated Clearance
Required
7.5 ft .
(2.13 m)
C
LEARANCE
C
ALCULATIONS
H
ORIZONTAL
S
YSTEMS
Applications where the SRL is used horizontally or with a horizontal system, the SRL and horizontal
system components must be compatible. Both the horizontal and vertical distances are required for
clearance calculations. Horizontal systems must be designed and installed under the supervision of a
qualifi ed person.
These units are suitable for use with horizontal lifelines.
PERFORMANCE
R410020
AND
R410030
R410050
Standards and
Regulations
Maximum Arrest
Distance
Free Fall Limit
Maximum Arrest
Force
Average Arrest
Force
Capacity
ANSI Z359.14
SRD Class A
24 in
(610 mm)
2 ft
(0.6 m)
1800 lbs
(8 kN)
1,350 lbs
(6 kN)
130 - 310 lbs
(59 - 141 kg)
OSHA 29 CFR
1910.140/1926.502
42 in
(1067 mm)
2 ft
(0.6 m)
1800 lbs
(8 kN)
N/A
400 lbs
(181 kg)
Standards and
Regulations
Maximum Arrest
Distance
Free Fall Limit
Maximum Arrest
Force
Average Arrest
Force
Capacity
ANSI Z359.14
SRD Class A
24 in
(610 mm)
2 ft
(0.6 m)
1800 lbs
(8 kN)
900 lbs
(4 kN)
130 - 310 lbs
(59 - 141 kg)
OSHA 29 CFR
1910.140/1926.502
42 in
(1067 mm)
2 ft
(0.6 m)
1800 lbs
(8 kN)
N/A
400 lbs
(181 kg)
