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3.0 INSTALLATION
3.1 PLANNING:
Plan your Fall Protection System prior to installation of the Rope Grab. Account for all factors that may
affect your safety before, during and after a fall. Consider all requirements, limitations and specifications defined in
Section 2 and Table 1.
3.2 INSTALLING THE COBRA ROPE GRAB TO THE LIFELINE:
A.
Ensure the rope grab is in the “UP” position as indicated on the product. The “UP” end of the rope grab must be
oriented towards the anchorage when installed onto the lifeline (see Figure 11.A).
1. Anchorage
2.
Lifeline
3.
Push Opening Lever Down
;
Cobra rope grabs incorporate a gravity-lock pin that slides out of the locking pin to prevent the lifeline
sleeve from mating with the rope grab cam when not held upright.
B.
Push the opening lever (knurled knob) downward until it reaches the bottom of the groove. Press the opening
lever inward until the release button is completely depressed.
C.
Pull the lifeline sleeve and the locking cam apart until the unit is fully opened.
D.
To install on the lifeline, raise the locking cam to the “up” position and install the rope inside the lifeline channel
and close the rope grab halves (see Figure 11.B). The spring-loaded lock pin will snap the unit shut.
1.
Rope Installed In Sleeve
2.
Locking Cam In “Up” Position
E.
The closing action should release the opening lever from the open position and the locking pin will slide into the
lock ring at the top of the lifeline sleeve. The opening lever should now be at the top of the groove and at rest
against the lifeline sleeve (see Figure 11.C).
1.
Sleeve Closed
2.
Opening Lever Returned To “Up” Position
3.
Release Button Freed
F.
Test the rope grab operation by pulling down on the locking cam. The rope grab must lock onto the lifeline and
prevent any descent on the lifeline once the cam is engaged.
3.3 POSITIONING THE ROPE GRAB ON THE LIFELINE:
To position the Rope Grab:
A.
Pull up slightly on the rope grab locking cam to release it from the locked position. Always keep a minimum of
3,7 m (12 ft.) of rope below the rope grab to accommodate locking distance and fall clearance.
B.
Raise or lower the rope grab to the desired location. Apply tension to the lifeline to assure smooth travel of the
rope grab on the lifeline. Lifeline tension can be achieved by adding a weight on the lifeline end or extending
additional lifeline (in a hanging orientation) to provide weight.
C.
After locating the rope grab, position it on the lifeline at or above the shoulders to reduce possible free fall. Lock
the rope grab at this position by pulling the locking cam until the cam lever is in the full down position. The
locking cam must be released before attempting to reposition the rope grab.
3.4 REMOVE ROPE FROM ROPE GRAB
A.
Push the opening lever (knurled knob) downward until it reaches the bottom of the groove. Press the opening
lever inward until the release button is completely depressed.
B.
Pull the lifeline sleeve and the locking cam apart until the unit is fully opened.
C.
Remove rope from rope grab
4.0 OPERATION AND USE
4.1 BEFORE EACH US:
Verify that your work area and Personal Fall Arrest System (PFAS) meet all criteria defined in
Section 2 and a formal Rescue Plan is in place. Inspect the Rope Grab per the ‘User’ inspection points defined on the
“Inspection and Maintenance Log” (Table 2). If inspection reveals an unsafe or defective condition, do not use the
system. Remove the system from service and destroy, or contact 3M regarding replacement or repair.
4.2 CONNECTING TO ANCHORAGE OR ANCHORAGE CONNECTOR:
See Figure 10.
When attaching the lifeline or
lifeline subsystem to the anchorage or anchorage connector, ensure the connector (self-locking snap hook) is fully
engaged and locked onto the connection point. Ensure connections are compatible in size, shape, and strength. Refer
to the anchorage connector and lifeline manufacturer’s instructions for further information.
4.3 CONNECTING TO THE BODY SUPPORT:
Anchor points for Fall Arrest are marked by capital letter “A”. For Fall
Arrest applications connect to appropriate Dorsal or Sternal attachment element of the full body harness. Ensure
connections are compatible in size, shape, and strength. Refer to the body support manufacturer’s instructions for
more information on making connections.
4.4 CONNECTING TO THE ROPE GRAB:
Use a carabiner to connect directly to the rope grab, ensure the carabiner will
not interfere with the operation of the rope grab. Carabiners must be of the self-closing/self- locking type. Ensure
connections are compatible in size, shape, and strength. Ensure the connector attached to the rope grab allows the
handle to rotate freely, and does not interfere with the rope grab operation.
4.5
PARKING FEATURE:
A.
To activate the parking feature, release the lever from the tab on the side of the rope grab and allow it to rotate
from vertical to horizontal (see Figure 2).
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