3M DBI SALA OSHA 1926.502(d)(12), Instruction Manual

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3.0 INSTALLATION
;
Installation of the DBI-SALA Climb Assist/Fall Arrest System must be supervised by a Qualified Person¹. The
installation must be certified by a Competent Person
2
as meeting the criteria for a Certified Anchorage, or that it is
capable of supporting the potential forces that could be encountered during a fall.
3.1 PLANNING: Plan your fall protection system prior to installation of the Climb Assist/Fall Arrest System. Account for all
factors that may affect your safety before, during and after a fall. Consider all requirements, limitations and specifications
defined in Table 1 and Section 2.
3.2 INSTALLING THE WIRE ROPE: Figure 6 illustrates installation of the wire rope cable in the safety block. The length
of the cable will depend on the location of the safety block, its height off the ground, and the location of the guy cable. A
general rule is to take the distance from where the climb starts to the location of the safety block (A), plus the distance
from the safety block to the top of the guy line and counterweight position (B).
1. Lay the safety block on a clean work surface and remove the four cover bolts, then pry the cover off. Using caution
not to damage the springs, lift the ratchet pawls off of the drum. Carefully remove the spring from the screw head
and set aside. Lift the drum from the housing and remove the pawls and springs from the opposite side. Feed
approximately 3 feet of wire rope through the left hand port.
;
Remove Pawls First: Remove the pawl first to ensure the spring is not over extended while removing it from
the screw head.
2. Wrap the wire rope clockwise around the drum 1-1/2 times, in a manner that does not allow the cable to cross over
the existing wrap. Coil the rope upward on the drum. Feed the end of the wire rope through the right port keeping
the rope snug on the drum. See Figure 6.
3. Replace the drum and rotate the shaft until it seats in the cover. Attach the spring around the screw head and
replace the ratchet pawls. The pawls are stamped with “A” on one side and “B” on the other. Make sure the pawls are
replaced with the “A” showing. Pawls should move freely. Replace the cover and torque bolts to 50 ft-lbs. See Figure
6.
4. Turn the block over and remove the cover. Attach the spring around the screw head and replace the ratchet pawls
making sure the “A” is showing. Pawls should move freely. Replace the cover and torque bolts to 50 ft-lbs. See Figure
6.
5. Put a clamp on the end of the cable to prevent it from pulling out of the block. Mount the block vertically and check
the locking action of the block in both directions by applying tension on both ends of the cable and jerking quickly on
one side and vice versa. Repeat steps 1-5 if locking action is not satisfactory. See Figure 6.
6. Connect the harness and Rung Hook Assembly to the end of the wire rope that will be run down the climbing surface.
Attach the harness and Rung Hook Assembly to the wire rope assembly using the provided quick link. See Figure 2.
3.3 INSTALLING THE SAFETY BLOCK: Figure 7 illustrates installation of the safety block on the climbing structure. The
safety block must mount vertically with the wire rope aligned with the ports on the safety block to eliminate abrasion
where the wire rope enters and exits the safety block. Available mounting bracket masts have a sheave to properly align
the wire rope where it passes through the safety block ports. Mounting the safety block directly to climbing structure
without a mounting bracket mast will require additional sheaves to ensure proper alignment of the wire rope and safety
block ports:
1. Use at least two attachment holes to mount the safety block vertically on the climbing structure or mounting bracket
mast. The block must be mounted rigid and not allowed to pivot or swing. Remove the front cover and back cover
screws from the desired mounting holes (Figure 7A) and replace with the fasteners provided with the mounting
bracket mast (Figure 7B) or comparable fasteners for direct mounting on the structure.
2. The use of a mounting bracket mast is recommended for ease of mounting and operation. The mounting bracket mast
must not extend above the last ladder connection by more than 4 feet (Figure 7C). Select the correct mast based on
the shape and size of the rungs to which the mounting bracket mast will attach (see Table 1).
3. Secure the mast to the ladder using the attachment hardware provided with the mounting bracket mast (Figure 7C).
The mast must be secured to the ladder structure with at least two rung clamp assemblies. Position the mast on the
ladder as directly above the climbing area as possible. Consider the guy cable angle and length when positioning
the mounting bracket mast (see Figure 7). Torque the fasteners to 20-25 ft-lbs. The bottom plate and sheave on the
mounting bracket mast can be reversed to allow the counterweight to operate on either side.
4. If the safety block is mounted directly to the climbing structure without a mounting bracket mast, install sheaves as
needed to ensure the wire rope passes through the safety block without abrading on the ports or internal sheave.
3.4 INSTALLING THE COUNTERWEIGHT: The counterweight weighs 80 lbs empty. Additional weight can be placed
inside the weight tube up to 160 lbs. See Figure 10. Do not hang weights outside the tube. Do not exceed the maximum
allowable counterweight. The counterweight cover plate must be secured.
1 Qualified Person: An individual with a recognized degree or professional certificate, and extensive experience in Fall Protection. This individual must be capable of
design, analysis, evaluation, and specification in Fall Protection.
2 Competent Person: One who is capable of identifying existing and predictable hazards in the surroundings or working conditions which is unsanitary, hazardous, or
dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.