4
DuraTech Cable SRL discussed in this manual. This product is not suitable for applications with leading
edge exposures where the lifeline of this device may come in contact with an edge during a fall event.
A handle/attachment point is cast into the housing. The housing contains various lengths of lifeline
composed of galvanized steel wire rope wound onto a spring-tensioned drum. The SRD lifeline is
equipped with a spring bumper to reduce retraction freewheel shock loads.
NOTE:
Freewheel refers to the uncontrolled retraction of the cable into the housing. Always maintain
tension on the cable, with a tag line if necessary, and do not allow the SRD to retract the cable in an
uncontrolled manner, as this could damage the unit.
As shown in Figure 1 below, the SRD has an aluminum housing with an integrated handle that contains
a lifeline composed of 7/32” diameter wire rope, wound onto a spring tensioned drum. The SRD’s
lifeline is equipped with a cable stop/handle assembly with a spring bumper, and a load-indicating
swiveling snap hook. When the user is attached, the lifeline extends and retracts with user movement,
automatically maintaining a taut lifeline. If a fall occurs, a centrifugal pawl system engages, a centrifugal
pawl system locks and applies a brake, slowing and arresting the fall.
See Table 1A in Appendix A for product and materials specifications.
2.1 American National Standards Institute (ANSI) and Occupational
Safety and Health Administration (OSHA):
The SRD discussed in this manual meets the standards of ANSI Z359.14-2021, ANSI A10.32-2012,
and Occupational Safety and Health Administration (OSHA) regulations 1926.502 and 1910.140. ANSI
requires SRDs be classified according to the type of usage the user would be exposed to, and are
tested either as Class 1 or Class 2. Dynamic performance means that the SRD is installed in a testing
drop tower. A test weight is attached to the SRD and then dropped. Test results are recorded.
Parameters tested are:
•
Arrest Distance (AD)
•
Average Arrest Force (AAF)
•
Maximum Arrest Force (MAF)
The Arrest Distance is the total vertical distance required to arrest a fall. The Arrest Distance includes
the deceleration distance and the activation distance. The Average Arrest Force is the average of the
forces applied to the body and the anchorage by the fall protection system. The Maximum Arrest
Force is the maximum amount of force that may be applied to the body and the anchorage by the fall
protection system. In addition to the above tests conducted in ambient conditions, the units must be
retested for average and peak forces under certain environmental conditions, where the units are
cooled, then tested, heated, then tested, or saturated in water and tested again. Separate units may
be used for each test. All test results are recorded. This test data is then used to establish the basis for
fall clearance guidelines published in the user instruction manual. Class 1 and 2: Class 1 devices shall
be used only on overhead anchorages and shall be subjected to a maximum free fall of 2 feet (0.6
m) or less. Class 2 devices are intended for applications where an overhead anchorage may not be
available or feasible and be subjected to a free fall of no more than 6 feet (1.8 m) over an edge. To be
Figure 1 - About FallTech
®
DuraTech Cable SRL
1
Anchorage Connecting Handle
2
SRD Unit Housing
3
Product/Warning Labels
4
Cable Stop/Handle Assembly
5
Load-Indicting Snap Hook
3
1
2
4
5
