3M Nano-Lok 3100468, User Instructions

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4.0 Operation
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First time or infrequent users of Self-Retracting Devices (SRDs) should review the “Safety Information” at the
beginning of this manual prior to use of the SRD.
4.1 BEFORE EACH USE: Before each use of this fall protection equipment carefully inspect it to assure it is in good working
condition. Check for worn or damaged parts. Ensure all bolts are present and secure. Check that the lifeline is retracting
properly by pulling out the line and allowing it to slowly retract. If there is any hesitation in retraction the unit should be
removed from service and destroyed. Inspect the lifeline for cuts, frays, burns, crushing and corrosion. Check locking
action by pulling sharply on the line. See the Inspection and Maintenance Log (Table 3) for inspection details. Do not use
if inspection reveals an unsafe condition.
4.2 AFTER A FALL: Any equipment which has been subjected to the forces of arresting a fall or exhibits damage consistent
with the effect of fall arrest forces as described in Table 3, must be removed from service immediately and destroyed.
4.3 BODY SUPPORT: A full body harness must be worn when using SRDs. For general fall protection use, connect to the
back (dorsal) D-ring.
4.4 MAKING CONNECTIONS: Figure 21 illustrates harness and anchorage connections for SRD Fall Arrest Systems. When
using a hook to make a connection, ensure roll-out cannot occur (see Figure 5). Do not use hooks or connectors that
will not completely close over the attachment object. Do not use non-locking snap hooks. The anchorage must meet the
anchorage strength requirements stated Section 1.4. Follow the manufacturer’s instructions supplied with each system
component.
4.5 OPERATION: Prior to use, inspect the SRD as described in Table 3. Figure 21 shows system connections for typical SRD
applications. Connect the SRD to a suitable anchorage or mount the SRD on the back of a Full Body Harness per the
instructions in Section 3. On anchorage connected SRDs, connect the Hook (D) or Carabiner on the Load Indicator to the
Dorsal D-Ring (A) on the Full Body Harness. On harness mounted SRDs, connect the Hook (D) or Carabiner to a suitable
anchorage (G). Ensure connections are compatible in size, shape, and strength. Ensure hooks (F) are fully closed and
locked. Once attached, the worker is free to move about within the recommended working area at normal speeds. If a fall
occurs the SRD will lock and arrest the fall. Upon rescue, remove the SRD from use. When working with an SRD, always
allow the lifeline to recoil back into the device under control.
4.6 TWIN SRD INTERFACE 100% TIE-OFF: When two SRDs are mounted side-by-side on the back of a Full Body Harness,
the SRD Fall Arrest System can be used for continuous fall protection (100 % tie-off) while ascending, descending, or
moving laterally (see Figure 22). With the Lanyard Leg of one SRD attached to an anchorage point, the worker can move
to a new location, attach the unused Lanyard Leg of the other SRD to another anchorage point, and then disconnect from
the original anchorage point. The sequence is repeated until the worker reaches the desired location. Considerations for
Twin SRD 100% tie-off applications include the following:
• Never connect both SRD Lanyards to the same anchorage point (see Figure 23A).
• Connecting more than one connector into a single anchorage (ring or eye) can jeopardize compatibility of the
connection due to interaction between connectors and is not recommended.
• Connection of each SRD Lanyard to a separate anchorage point is acceptable (Figure 23B).
• Each connection location must independently support 2,248 lbs (10 kN) or be an engineered system, as with a
Horizontal Lifeline.
• Never connect more than one person at a time to the Twin SRD system (Figure 23C).
• Do not allow the Lanyards to become tangled or twisted together as this may prevent them from retracting.
• Do not allow any lanyard to pass under arms or between legs during use.
4.7 AERIAL WORK PLATFORMS: Use of the SRD on aerial work platforms is permissible, provided the following criteria are
met:
1. SRDs generally will not restrain workers from falling out of aerial work platforms or elevated working surfaces. To
restrain users from falling out of aerial work platforms, Positioning Lanyards of sufficiently short lengths should be
used.
2. Aerial work platforms must have guardrails or gates at all accessible edges along their perimeter unless anchorages
for the SRDs are located overhead. The edges on the top rails of all guardrails and gates over which the user might
fall must have a minimum radius of 0.3 cm (1/8 in).
3. Anchorages of appropriate strength and compatibility must always be used for securing SRDs.
4. Swing fall hazards may exist, especially when working near corners or out away from anchorage points. Added fall
clearance is needed where the potential for swing fall exists (see Figure 3).
5. All sharp edges which the SRD’s lifeline may contact during a fall must be eliminated or covered over. All edges the
SRD lifeline may contact in a fall must be smooth with an edge radius of 0.3 cm (1/8 in) or greater. Potential pinch
points between adjacent surfaces where the lifeline may catch during a fall must be eliminated.
4.8 HORIZONTAL SYSTEMS: In applications where the SRD is used in conjunction with a horizontal system (i.e. Horizontal
Lifeline, Horizontal I-Beams Trolley), the SRD and horizontal system components must be compatible. Horizontal systems
must be designed and installed under the supervision of a qualified engineer. Consult the horizontal system equipment
manufacturer’s instructions for details.