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figure 3 - Unintentional Disengagement (roll-out)
If the connecting element that a snap hook (shown) or carabiner attaches to is undersized
or irregular in shape, a situation could occur where the connecting element applies a
force to the gate of the snap hook or carabiner. This force may cause the gate (of either a
self-locking or a non-locking snap hook) to open, allowing the snap hook or carabiner to
disengage from the connecting point.
Small ring or other
non-compatibly
shaped element
1. Force is applied to
the snap hook.
in size, shape and strength. Do not use equipment that is not
compatible. Ensure all connectors are fully closed and locked.
DBI-SALA connectors (snap hooks and carabiners) are designed to
be used only as specified in each product's user's instructions. See
Figure 4 for inappropriate connections. DBI-SALA snap hooks and
carabiners should not be connected:
a.
To a D-ring to which another connector is attached.
B.
In a manner that would result in a load on the gate.
NOTE: Large throat opening snap hooks should not be connected
to standard size D‑rings or similar objects which will result in a load
on the gate if the hook or D‑ring twists or rotates. Large throat snap
hooks are designed for use on fixed structural elements such as rebar
or cross members that are not shaped in a way that can capture the
gate of the hook.
c.
In a false engagement, where features that protrude from the
snap hook or carabiner catch on the anchor and without visual
confirmation seems to be fully engaged to the anchor point.
D.
To each other.
e.
Directly to webbing or rope lanyard or tie-back (unless the
manufacturer's instructions for both the lanyard and connector
specifically allow such a connection).
f.
To any object which is shaped or dimensioned such that the
snap hook or carabiner will not close and lock, or that roll-out
could occur.
2. The gate presses against
the connecting ring.
7
3. The gate opens
allowing the snap hook
to slip off.
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