3M DBI-SALA Nano-Lok Handbuch Seite 20

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 5 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 in Table 2. 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 14 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. Ensure connections are compatible in size, shape, and strength. Ensure hooks 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 15). 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 16A).
• 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 16B).
• 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 16C).
• 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 TWIN SRD DORSAL D-RING MOUNTING: Models with the Triple action Carabiner can be mounted to the Dorsal D-Ring
in a twin configuration. To mount two SRDs on the Dorsal D-Ring of a Harness (Figure 13):
1. Open the Triple Action Carabiner: with the Triple Action Carabiner orientated as illustrated, push the Locking
Sleeve (C) to the right and then turn clockwise to unlock the Gate (D). Swing the Gate (D) down to open.
2. Thread the first SRD onto the Triple Action Carabiner: insert the Nose of the Connector (E) through the
Swivel Eye (F) on the SRD and then rotate the SRD around to the Gate End of the Connector (G). The Gate can
be closed to allow clearance for the Swivel Eye between the Gate and Spine of the Connector.
3. Add the second SRD on the Triple Action Carabiner: Slide the SRD's Swivel Eye (F) over the Nose of the
Connector (E).
4. Thread the Triple Action Carabiner through the D-Ring: Insert the Nose of the Connector (E) through the
Dorsal D-Ring (A). Rotate the Connector through the D-Ring until the gate can be closed .
5. Close the Triple Action Carabiner: Allow the Gate (D) to swing closed and the Locking Sleeve (C) to rotate
back to locked position.
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.
;
Fall Clearance values in Figure 4 are based on anchoring to a rigid, stationary anchor point and do not apply to
anchoring to a Horizontal Lifeline (HLL) system. Consult the HLL Instruction Manual and HLL Installer to determine
required Fall Clearances.
5.0 Inspection
5.1 RFID TAG: The Self-Retracting Device includes a Radio Frequency Identification (RFID) tag (see Figure 17). The RFID
tag can be used with the handheld reading device and web based portal to simplify inspection and inventory control and
provide records for your fall protection equipment. For details, contact a 3M Customer Service representative (see back
cover). Follow the instructions provided with your handheld reader, or on the web portal, to transfer your data to your
web log.
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