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3.0 Installation
3.1
PLANNING: Plan your fall protection system before starting your work. Account for all factors that may affect your safety
before, during, and after a fall. Consider all requirements and limitations defined in Section 2.
;
In most applications, the Nano-Lok Tie Back SRD can be connected to the anchorage or the harness Dorsal location.
Either orientation is allowed; except as noted in Section Section 4
3.2
ANCHORAGE: Figure 7 illustrates a twin SRL anchorage with tie-back (A, B) and snap hook (C, D) connections. Select an
anchorage location with minimal free fall and swing fall hazards (see Section 1.4). Select a rigid anchorage point for each
connection that is capable of sustaining the static loads defined in Section 1.4. Where anchoring overhead is not feasible, Nano-
Lok SRLs may be secured at D-Ring level for 310 lb (141 kg) users. 420 lb (191 kg) users must anchor at least 2 ft (0.6 m)
above the dorsal D-Ring.
3.3
TIE-BACK ATTACHMENT: See Figure 7. Snap hooks and WrapBax hooks operate in the same manner.
Step 1. Grip the hook handle in one hand. With your index finger, depress the locking mechanism in.
Step 2. With your thumb, pull back the gate latch. As the gate latch is pulled back, the gate will open. Release your grip and
the gate will close.
Wrap the tie-back portion of the lifeline (B) around an appropriate anchor (A), then open the gate of the
Tie-back snap hook and pass the lifeline through the hook. The lifeline may only be passed through the Tie-back hook
once. Make sure the Tie-back portion of the lifeline is captured and the gate closes completely.
;
Only the WrapBax hook may be used to snap back directly onto the blue Tie-Back SRL Lifeline. When installed, the
Tie-Back hook must contact the blue wear sleeve (Tie-Back portion of the lifeline). If the anchor structure is so large
that the Tie-Back hook contacts the lifeline webbing material, a different anchor structure must be used. Never tie-back
onto the shock pack or onto the yellow SRL life line.
3.4
HARNESS MOUNTING: Some SRD models include a Single SRD or Twin SRD Harness Interface for mounting the SRD(s)
on a Full Body Harness just below the Dorsal D-Ring:
;
Some Full Body Harnesses are equipped with a Harness Interface Link that integrates the Dorsal D-Ring with
attachment elements for Harness Mounted Self-Retracting Devices (Figure 17). It is also acceptable to connect the SRD
to the Harness Dorsal D-Ring with a Carabiner or Snaphook.
•
Single SRD Harness Interface: Where worker mobility is critical, a Single SRD Harness Interface can be used to mount
the SRD on the back of a Full Body Harness just below the Dorsal D-Ring (see Figure 18). The worker can then connect to
varied anchorage points located throughout the site with the Lanyard End of the SRD without repeatedly reinstalling the
SRD. To mount the SRD on a Full Body Harness with the Single SRD Harness Interface:
1.
Loosen the Harness Webbing: Pull out on the Web Straps (A) where they pass through the bottom of the
Dorsal D-Ring (B) until there is sufficient space to slide the Single SRD Interface between the Web Straps and
Back Pad.
2.
Open the Harness Interface: Push down on the Locking Buttons (C) simultaneously and slide the Locking Pin
(D) out.
3.
Position the Harness Interface around the Web Straps: With the Locking Buttons (C) facing out and Gate
facing up, insert the Nose End of the Harness Interface (E) behind the Web Straps (A). Rotate the Harness
Interface behind the Web Straps until the Harness Interface surrounds the the Web Straps. Pull the Web Straps
back through the Dorsal D-Ring and Back Pad to secure the Harness Interface.
4.
Attach the SRD to the Harness Interface: Slide the Swivel Eye on the SRD (F) over the Harness Interface's
Locking Pin (D) and then push in the Locking Pin until it locks into place in the opposite end of the Harness
Interface.
;
The Red Band on the knob end of the Harness Interface Locking Pin will be exposed if the Harness
Interface is unlocked. To avoid accidental release of the connection, always make sure the Harness Interface
is locked before using the Harness and attached SRD. Failure to do so could result in injury or death.
•
Twin SRD Harness Interface: In climbing applications where 100% tie-off is required, the Twin SRD Harness
Interface can be used to mount two SRDs side-by-side on the back of a Full Body Harness just below the Dorsal
D-Ring (see Figure 19) To mount two SRDs on a Full Body Harness with the Twin SRD Harness Interface:
1.
Loosen the Harness Webbing: Pull out on the Web Straps (A) where they pass through the bottom of the
Dorsal D-Ring (B) until there is sufficient space to slide the Twin SRD Interface between the Web Straps and
D-Ring Pad.
2.
Open the Harness Interface: Push up on the Connector Insert (C) to unsnap the Clamps (D) from the
Connector and then swing the Connector Insert up to unlock the Gate. Push the Gate (E) inward to open the
Connector.
3.
Thread the first SRD onto the Harness Interface: Insert the Nose of the Connector (F) through the Swivel
Eye (G) on the SRD and then rotate the SRD around to the Gate End of the Connector (H). The Gate can be
rotated toward the Nose to allow clearance for the Swivel Eye between the Gate and Spine of the Connector.
18
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