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Old 09-07-2018, 03:43 PM   #1
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Default Wind Tower Differences

Last fall I worked a wind farm that was using Vestas towers. There are some open calls and some calls coming up using other manufacturers. Has anyone worked Vestas towers and another manufacturer? What differences did you notice?
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Old 09-11-2018, 10:23 PM   #2
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Guess I'll find out. Started on one today with GE towers.
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Old 10-07-2018, 12:18 PM   #3
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Guess I'll find out. Started on one today with GE towers.
Keep the board posted. I know little about wind turbine work. Thanks
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Old 10-07-2018, 12:29 PM   #4
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Not much to post. I'm too fat to climb. The Vestas I did before have a 150kg (330 lbs.) weight limit on the ladder. These GE towers have a 310 lbs. limit. That's climber plus all his gear. Holding all my gear, I weighed in at 313 lbs. So they put me on the ground crew. I learned a lot there and it was interesting. As far as the towers, I know staging crew installs busbar into the tower sections before they go up and climbing crew connects them with braids once they're up. On the Vestas towers the high voltage is on a cable instead. I've since moved on to a job out of my local. I'll post later about the ground crew work.
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Old 10-07-2018, 02:31 PM   #5
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My partner gets outta stuff with his weight limit too. If he carries a screwdriver up a ladder he's over the limit.
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Old 10-07-2018, 02:33 PM   #6
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Default Ground Crew on GE towers

A typical day on GE tower ground crew, we'd do one inner ring, pipes, and a ground grid. Worked 10-12 hours a day with paid lunch, since you never know when you will be able to catch it. The ironworkers will bury you if you don't stay right on their tail.
The tower bases are in a 20 foot deep 75 foot diameter excavation. The concrete flat is about a 50 foot diameter. We rolled 4/0 bare copper around the base rebar at a 185 to 200 foot circumference and crimp it together. Then we crimp on two pieces on opposite sides that roll up to the center cage and leave about 15 foot coils at the top of the center cage. Then the ironworkers put up rebar in a cone up to 6 foot down from the center cage.
Once the cone is built, we put in the PVC pipes in the top 6 foot of the center cage. 6-4 inchers, 2-2 inchers and 4-1 inchers. Tie wired to the cage and a jig we install. Then they pour the concrete.
Once they pour the concrete and it sets, we drive ground rods at 90 intervals and run a 4/0 around the outer perimeter and crimp it to the rods. We then run two 4/0s up the side for transformer and two up through 2 of the 1 inchers to the pad top. Then we run a loop around the pad top and 2 pieces through the other 2 1 inchers. Then we trim down all the pipes on top and put bells on them.
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Old 10-07-2018, 02:38 PM   #7
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My partner gets outta stuff with his weight limit too. If he carries a screwdriver up a ladder he's over the limit.
Did that to my toolie in Jonesboro. He had a 250 lb ladder and I had a 300. While he was off making a piece of pipe, the apprentice came by needing a ladder. Being generous, I gave him mine. Numbers came back with the piece he made and I told him I would do the rest of the fabbing today cause he was going to have to do all the hanging.
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