3M PROTECTA Cobra, User Instructions

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Prior to installation and use of this equipment, record the product identification information from the ID label in the
Inspection and Maintenance Log (Table 2) at the back of this manual.
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Always ensure you are using the latest revision of your 3M instruction manual. Visit the 3M website or contact 3M
Technical Services for updated instruction manuals.
PRODUCT DESCRIPTION:
Figure 1 illustrates the 3M™ Protecta
®
Cobra™ Rope Grab. The Rope Grab is a fall arrest device which is to be used only with
approved vertical lifelines and approved lanyards. Together, the Rope Grab, with the approved vertical lifeline and approved
lanyard, is intended to be used as part of a personal fall arrest or restraint system.
Figure 2 illustrates components of the Rope Grab. See Table 1 for Component Specifications. The Rope Grab provides a portable
lanyard connection point on a 5/8 in. diameter rope lifeline. The Rope Grab is designed to automatically follow the user and may
be detached anywhere along the lifeline. DO NOT HANDLE THE DEVICE WHILE ASCENDING OR DESCENDING.
Table 1 – Specifications
System Specifications:
Capacity : 1 Person with a combined weight (clothing, tools, etc.) between 130 - 310 lb. (59 - 140 kg).
Dimensions: See Figure 1 for the dimensions of the Cobra Rope Grab model.
Product Weight: See Figure 1 for the weight of the Cobra Rope Grab model.
Standards: OSHA 1926.502; OSHA 1910.140
Allowable Free
Fall Distance:
6 ft. free fall for OSHA (max 3.0 ft. length Energy-Absorbing Lanyard)
Lanyard
Specifications:
Fall Arrest: Use Protecta Energy-Absorbing Lanyard 1341002 (3 ft. length). Do not use a Restraint
Lanyard. Length of the Energy-Absorbing Lanyard must be ≤ 3.0 ft. to comply with OSHA.
Restraint: Use a Restraint Lanyard that meets ANSI Z359.3 requirements. The length of the Restraint
Lanyard must be set up so that no free fall is possible. The Restraint Lanyard must be ≤ 3.0 ft.
Vertical Lifeline
Specifications:
This Rope Grab is certified for use ONLY with the following approved Protecta Vertical Lifelines.
Material: Polyester/Polypropylene blend (PN:9501761), Nylon (PN: 9501039)
Diameter: 5/8 in. (16 mm) Rope Construction: Three-Strand
Vertical Lifeline Minimum Breaking Strength: 5,000 lb. (22.2 kN)
Approved Vertical Lifeline Models:
Polyester Polypropylene Blend: 1299996, 1299997, 1299991, 1299992, 1299998, and other Protecta
vertical lifeline models made from rope 9501761.
Nylon: AC215A, AC210A1, AC210A2, AC215A1, AC215A2, AC225A1, AC230A1 and other Protecta Vertical
Lifeline Models made from Rope 9501039.
Fall Clearance
Requirements
(Figure 4 and
Figure 5):
Figure 4 illustrates how Rope Grab positioning affects Fall Clearance and Figure 5 specifies these values.
The Rope Grab may be used only with 3M-approved vertical lifelines and lanyards of a specific length.
Values in figure 5 include a 1.5 ft. safety factor. Values account for stretch in the vertical lifeline.
Component Specifications:
Figure 2 Reference Component Figure 2 Reference Component
A
Attachment Eye
G
Release Button
B
Locking Cam
H
Lifeline Channel
C
Lock Ring
I
Dimple
D
Lock Pin
J
Hinge
E
Opening Lever
K
Auto-Locking Lever
F
Groove
L Locking Arm Spring
M Label
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Never use a lanyard longer than the lengths stated above or combine multiple together.
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DO NOT use rope grab with any rope lifelines that are not approved.
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Knots shall not be used for load bearing end terminations, but may be an acceptable means of
securing the free end of the lifeline at ground level or attaching counterweight at ground level.