How do they build those tall cranes, why do you never see one being built ?
Answers:
They start small and grow up, seriously, the start with a basic structure and put a cage around this. Two segments are then pulled apart and a new segment inserted in between. After fixinbg it to one end, those segments can be moved apart again and a new segment is inserted. Sometimes the crane is getting that tall that it could become instable and is anchored to the building. It was quiet interesting to see how this worked here in Manchester where they have just finished the tallest residential building in Europe.
They are built in warehouses. They build them horizontally before they are stood up vertically.
dey piece them 2gether on top of each other wit 1 of those cranes that extend
The tall cranes at building construction sites are normally put up within a day or so. They usually come in pieces and the main part is erected from the back of a large truck.
Here is a link that explains all the different types of cranes.
http://en.wikipedia.org/wiki/crane_%28ma.
they build them selves the first piece is put inside aframe that lifts it up then the second piece is slid in under neath the first .this is lifted and section 3 is slid in underneath and bolted up so basically the cranes put them selve up
skywards
they build them in the tall crane factory and they assemble them when you are not paying attention or are watching your house burning down ,that's if you have a house,but if you are homeless then you can watch them being assembled all the time but you would freeze because your house would not be burning cos you don't have one,hope this clears things up for you.are you homeless???
Some cranes are assembled by large mobile cranes, others build thenselves by using a jack that moves the tower up a level so a section can be inserted underneath, the jib is built, section by section ether side of the tower, keeping the weight matched. You probably never see one being built because they are so fast to assemble.
they build themselves i watched a program called " how it`s made " on sky TV and it showed you on there .look out for it as the program`s are always repeated every few week`s i think it`s on reality TV about 6 o'clock .
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