CommScope ConQuest Conduit Construction User Manual
Page 49
Aerial Installation
6.5
Lashing
Installation – Overlashing Existing Cable
Overlashing conduit onto existing cable plant is similar to installing conduit onto new strand. However, there are some
unique aspects.
A sag and tension analysis should be performed to see if the new 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 conduit being
pulled.
Use cable blocks designed specifically for overlash applications. Place them onto the cable bundle with a cable block
lifter and lift the conduit 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.