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WARNING: Large throat opening snap hooks such as scaffold or rebar hooks should not be connected to
standard size D-rings or similar objects. The reason for this is if the hook or D-ring twists or rotates, then this may
result in a load on the gate of the connector. Large throat snap hooks are specifically designed for use on fixed
structure elements such as rebar or cross members. These are shaped in such a way that they cannot capture the
gate of the hook.
8) NEVER USE INAPPROPRIATE
CONNECTIONS
While using D
WALT snap hooks and
E
carabiners, they should not be connected as
below:
a ) Two or more connectors should never be
attached to a single D-ring.
b ) Never attach a connector that could result in a
load on its gate.
c ) Connectors should not be connected in a false
engagement. It should be visually confirmed
that the connector is fully engaged to the anchor
point. Avoid conditions that allow for features
that protrude from the connectors to catch
on the anchor, giving a false sense of being
connected.
d ) Connectors should not be connected to each
other.
e ) Connectors should not be connected directly to
the webbing or to the rope lanyard or tie back,
unless specifically allowed by the manufacturer.
f ) Connectors should not be connected to any
object which does not allow the connector gate
to close or lock. Anchor shapes that allow roll out
to occur should never be used for connection. If
the anchor, to which the snap hook or carabiner
B.
A.
D.
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is attached, is under sized or irregular in shape,
then this may allow for the gate of the connector
to come in contact with the anchor, thereby
causing the connector to open up and possibly
disengage from the anchor. This is known as roll
out of the connector.
9) IMPORTANT RESTRICTIONS WHILE
MAKING CONNECTIONS
a ) A snap hook should not be connected into a loop
or thimble of a wire rope, or attached to it in any
way that may slack the wire rope.
b ) Do not make connections where the connector
locking mechanism can come into contact with
a structural member, or other such equipment,
as it may potentially unlock the connector and
release the connection.
c ) To connect to a single or a pair of soft loops on a
harness, a carabiner that can fully close and lock
should only be used. Snap hooks are not allowed
for such connections, unless specifically allowed
by manufacturer.
d ) A carabiner may be connected to a loop or ring
connector that is already occupied by a choker
style connector. Snap hooks are not allowed for
such connections.
C.
E.
F.
WARNING: If the connecting element to which a snap hook (shown) or carabiner attaches 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.
UNINTENTIONAL DISENGAGEMENT (ROLL OUT)
Small ring or other
non- compatibly
shaped element
10) CONNECTING SUB SYSTEMS
a ) Use only those connecting subsystems (self-
retracting lifeline, lanyard, rope grab and
lifeline, cable sleeves) that are suitable for your
application.
b ) See subsystems manufacturer's instructions for
more information. Some harness models have
web loop connecting points.
c ) Do not use snap hooks to connect to the web
loop. Use a self-locking carabiner to connect to
a web loop.
d ) Ensure the carabiner cannot cross-gate load
(load against the gate rather than along the
backbone of the carabiner).
11) RESCUE PLAN
a ) A rescue plan should be well documented and in
place before performing work at height.
b ) The rescue operation must be performed by
trained and competent personnel only.
c ) The rescue expert team should supervise the
rescue operation performed.
d ) It is also advised to work in pairs while working
on the site.
12) ENVIRONMENTAL HAZARDS
Environmental hazards may include the following, but
are not limited to:
•
Chemicals
•
Extreme Temperatures
•
Corrosive Environments
•
Gases
•
High Voltage Power Lines
•
Sharp Edges
•
Moving Machinery and Vehicles
Please contact DFP Safety for use of this equipment in
the presence of any environmental hazard.
12) ANCHORAGE STRENGTH
The application type determines the anchorage
strength requirement. As per ANSI Z359.1 the necessary
anchorage strength for the following applications is
listed below:
•
Fall Arrest: As per OSHA 1926.500 and 1910.66
anchorages that are used for attachment of
Personal Fall Arrest Systems (PFAS) shall be
independent of any anchorage being used to
support or suspend platforms. They should be
capable of withstanding a minimum load of
5000 lbs. (23 kN) per user attached, or should
be designed, installed and used as part of a
complete PFAS which maintains a safety factor
of at least two. Rating of the anchorage should
always be done under the supervision of a
qualified person.
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