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A
Never connect two active components (snap hooks or carabiners) to each other.
B
Never connect two active components (snap hooks or carabiners) to a single D-ring at the same time.
C
Never connect in a way that would produce a condition of loading on the gate.
Never attach to an object in a manner whereby the gate (of the snap hook or carabiner) would be
D
prevented from fully closing and locking. Always guard against false connections by visually inspecting
for closure and lock.
Never attach explicitly to a constituent subcomponent (webbing, cable or rope) unless specifically
E
provided for by the manufacturer's instructions for both subcomponents (snap hook or carabiner and
webbing, cable, or rope).
Never attach in a manner where an element of the connector (gate or release lever) may become
F
caught on the anchor thereby producing additional risk of false engagement.
Never attach a spreader snap hook to two side/positioning D-rings in a manner whereby the D-rings
G
will engage the gates; the gates on a spreader must always be facing away from the D-rings during
work positioning.
4.6 Average Arrest Force and Arrest Distance:
Table 1B and 1C in Appendix A provide test data on typical performance attributes of the three
principal parameters: Arrest Distance, Average Arrest Force, and Maximum Arrest Force, listed by
model number and class. Testing is conducted under various environmental conditions, at ambient
temperature, hot, cold, and wet conditions. In manufacturer's tests, worst case performance attributes
of the SRL, connected 5' below dorsal D-ring in a Leading Edge application are:
5' Below D-Ring, Leading Edge
Longest Arrest Distance
Largest Average Arrest Force
Largest Maximum Arrest Force
The Competent Person may find this data useful with planning anchorage location and calculating fall
arrest loads and distances from the walking/working level to the nearest obstruction or lower level. See
Section 5.
NOTE: Arrest distance is one part of the Minimum Required Fall Clearance (MRFC). The MRFC is
determined by consideration of multiple factors in fall protection. Attachment below the level of the
FBH D-ring will require additional fall clearance. MRFC is discussed in detail in Section 5.
4.7 Personal Fall Arrest System Anchorage Strength:
An anchorage selected for PFAS application must have the strength to sustain a static load applied in
the direction permitted by the PFAS of at least:
a. Two times the maximum arrest force permitted when certification exists, or
b. 5,000 lbs. (22.2 kN) in the absence of certification.
Select an anchorage location carefully. Consider structural strength, obstructions in the fall path, and
swing fall hazards. In certain situations, the qualified person can determine that a given structure is
able to withstand the applied MAF of the PFAS with a safety factor of at least two, as required by OSHA.
8
Figure 5 - Non-Compatible Connections
130 to 310 lbs.
(59 to 141 kg)
115" (2.9 m)
917 lbs (4.1 kN)
1,421 lbs (6.3 kN)
1
30 to 420 lbs.
(59 to 191 kg)
154" (3.9 m)
889 lbs (4.0 kN)
1,605 lbs (7.1 kN)
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