Air spinning (AS) construction method
STEP1: Reeling Works
The picture below shows reeling devices, comprised of a Uncoiler, Wire Tensioner, and U/R Winch. The wire coil (2 ton) is reeled to the U/R Winch for spinning work.
STEP2: Hauling Devices
A device to pull out wire from the U/R Winch. It is comprised of a Counter Balance Tower (to introduce tension to the wire), and Driving Devices (for the traveling carrier).
STEP3: Spinning Wire
A wire makes loops on the carrier, and is pulled out over the catwalk. The lower wire is laid down on the way over, and the upper wire on the way back. The wires are laid down onto a supporting structure called a "cable former".
STEP4: Forming at saddle / Flxing wire
Wires are laid down on the tower top saddle and splay saddle, in an orderly manner. When the carrier arrives at the anchorage, wires are placed around the strand shoe during tensioning.
STEP5: Completion of Strand Cable
When the wires accumulate to form a strand (approx. 500 wires), then both ends are connected so that the strand forms a circle. This strand-making process is repeated, and the strands are again compacted to form one cable.