ktvu's cloudin wong jones us live to explain why this was such a significant improvement and what's next in the long project. good afternoon, claudine. >> reporter: good evening, tory. yes, the plan was to have the crew working at this hour on the tower but if you are looking, there are no crews working right now and that's because the last leg is already in place. that project wrapped up around 1:30 this among, 30 hours ahead of schedule. we are now getting an up close look at what's next. this is new video begin to us today by cal tran. >> if you think of the main tower as a school with four legs, we have completed a leg. >> there were four pieces of this last leg, each weighing 400 tons, each hanging 400 feet in the air. >> if you see them, you can see how much they are. on tuesday, the schedule was threatened by wind and rain but the weather improved enough to get the work done ahead of schedule. the tower now stands at 480 feet. by april, it will be 425. and this is the stool, this is the top of the stool, something known as a saddle. >> the cable that will hold up this entire rig w