24
B. INSTALLATION OF BB-4, BB-5, AND BB-6 BOTTOM BRACKETS:
Bottom Bracket Installation:
See Figure 24 for a typical installations of the BB-4 and BB-6 bottom brackets onto a round rung ladder.
See Figure 25 for a typical installation of the BB-5 bottom bracket with a weld-on stand-off support. The
bottom bracket should be positioned to allow users safe access when connecting or disconnecting from
the system. The bottom bracket must be mounted in-line (vertically) with the top bracket.
WARNING:
One rung clamp is designed to bolt through the bracket and onto the rung. This
clamp must not be omitted, or the bracket may slip under load.
Install the rung clamps using the hardware provided. Do not substitute other fasteners. Torque
fasteners to 20-25 ft.-lbs (27.1-33.9 N-m).
Weld-on Stand-off Installation:
Install the SO-2 stand-off support as shown in Figure 25. See section 3.2 for welding recommendations.
The stand-off must be perpendicular
to the pole surface and in-line with the
carrier cable.
Carrier Cable Tension Adjustment:
Figures 24 and 25 show the assembly
of the tension rod to the bottom
bracket and carrier cable. Loosely
clamp the saddle clips around the
carrier cable. Slide the tension rod
down the carrier cable and through
the hole in the bracket until suffi cient
threads are exposed to allow the
installation of the washers and nuts.
Remove slack in the carrier cable by
pulling the cable through the saddle
clips. Tighten the saddle clips to
35 ft.-lbs (47.5 N-m). Tighten the
tensioning nut until the carrier cable
is taut. A small amount of grease on
the tension rod threads will reduce
the effort required to tension the
carrier cable. Compress the spring to
approximately 5-1/2 in. (14 cm). Do
Figure 24 - Installing Bottom Brackets
BB-4 Bottom Bracket
Installation
BB-6 Bottom Bracket
Installation
Compress
to 5-1/2”
(14 cm)
Compress
to 5-1/2”
(14 cm)
Figure 25 - Installing Bolt-on Bottom Bracket &
Weld-on Stand-off
BB-5 Bottom Bracket and
SO-2 Stand-Off Installation
Compress
to 5-1/2”
(14 cm)
1-1/8” (2.86 cm)
