CommScope Trunk & Distribution Cable - Manual (Page 29)

Installation - Overlashing Existing Cable
Overlash Cable Placement
Overlashing cables onto existing cable plant is similar to installing cable onto new strand. However, there are
some unique aspects:
A sag and tension analysis should be performed to see if the new cable load will overwhelm the strand.
Use special overlash cable puller blocks and continuously maintain and monitor the pulling line tension. Overlash
cable pullers do not have a strand brake and will be pulled backward on the span by the tension in the cables
being pulled.
Use cable blocks designed specifically for overlash applications. Place them onto the cable bundle with a cable
block lifter and lift the cable with a cable lifter. During lashing, remove the cable blocks from the cable bundle
with a cable block lifter. DO NOT PUSH THE CABLE BLOCKS in front of the lasher as that may damage existing
cables.
Remove all straps and spacers from the existing cable bundle during lash-up. New straps and spacers may be
required - check the old ones carefully to see if they need replacing.
Aerial Installation 3.15
Overlashing