I couldn't give him an answer. Can you?
2007-12-15 04:11:27 · 12 answers · asked by ? 5 in Society & Culture ➔ Other - Society & Culture
My understanding is that they "jack" themselves up. As one section on the ground is installed, jack it up and install the next under that until get the desired height. Sort of like growing from the ground up.
http://science.howstuffworks.com/tower-crane.htm
Good site for your son to have a look at!
2007-12-15 04:15:05 · answer #1 · answered by Sal*UK 7 · 3⤊ 0⤋
As Mr MIlls said, they more or less build themselves. A mobile crane is used to start the process but to after that they jack themselves up and insert new sections under thier own power.
This site explains it better than me,
http://science.howstuffworks.com/tower-crane4.htm
2007-12-15 04:23:55 · answer #2 · answered by ? 3 · 0⤊ 0⤋
It might seem a strange answer but ........... other cranes are used!.. Special mobile ones that actually erect the towers. See it all the time in Spain.
2007-12-15 09:44:05 · answer #3 · answered by costa 4 · 0⤊ 0⤋
They build themselves from the ground up, by lifting each section hydraulically and then inserting another section.
nb: smaller mobile cranes are often used to lift the boom up onto the tower first.
2007-12-15 04:14:52 · answer #4 · answered by Anonymous · 1⤊ 1⤋
Mr Mills is right.
Try Wiki for a good read.
2007-12-15 04:22:58 · answer #5 · answered by firebobby 7 · 0⤊ 0⤋
They actuall build them selves,
2007-12-15 04:15:29 · answer #6 · answered by taxed till i die,and then some. 7 · 0⤊ 0⤋
They use a crane.
2007-12-15 04:13:47 · answer #7 · answered by Anonymous · 0⤊ 1⤋
yeah they use a bigger crane and build it up piece by piece
2007-12-15 04:14:38 · answer #8 · answered by Glenn F 5 · 0⤊ 2⤋
You have never bought him a toy contruction set?
2007-12-15 04:17:16 · answer #9 · answered by Anonymous · 0⤊ 0⤋
with another crane?
2007-12-15 04:14:21 · answer #10 · answered by Shelley J 3 · 0⤊ 1⤋