Furman Films a bridge. When that five o'clock whistle sounded, you could tell it was "Miller Time." :44 Coming down at the end of the day SECTION III SPINNING THE CABLES/ FINISHING THE BRIDGE Length: 5:01 :07 YBI cable spinning (B) This is Yerba Buena Island. The tunnel is almost complete, and the huge concrete anchor is beginning to take the pull of the cables. Six days a week, 24 hours a day the cables are pulled back and forth between the central anchorage in the middle of the bay, and the ones on land. Each strand is about the thickness of a pencil. When the wire reaches the anchor, it is hooked over one of the eyebars sunk deep in the concrete, the tension is adjusted, the wire placed over the spinning wheel again, and it starts back the other way. :57 Cu spinning cable (B) 1:00 Spinning cable Each cable on the two suspension bridges is made up of one continuous wire, although they are spun two at a time. The final bundle of each cable had over 17,000 strands in it! Each of these big spools holds 57 miles of wire. The bridge used 1500 of them to make the cables. 33.