Do they have to be taken apart... if so, how are they taken apart... by another crane? - but how did that one get there etc etc
lattice type cranes are always disasembled to be transported. mobile cranes such as truck cranes drive on the road without having to be taken apart. Rough Terrain cranes are loaded onto a carrier to be transported.
it depends on the crane over the road mobile cranes drive them selfs to the job site and they have a dolly for the conter weights and then on the larger ones a semi brings in the conter weights. Then on a latise boom crawler crane it depends on the size of the crane if its a small one say a 150 ton crane the body and tracks can usally be moved together on a semi and the lattice boom will come on a seperate truck and is usally assembled with a all terrain fork lift. Then say on a larger crawler crane like a 500 tonner the body and tracks and carrige all come in seperate peices and are ussally put togther with a RT crane(more on the latter) and these cranes are held together with massive pins i saw a crew build a 400 ton manitowac crane with 150 feet of stick in less then a day. Now if they have to add more stick like say 200 feet of main stick and 150 feet of luffing jib they will build it all on the ground and then another crane will help lift the stick up Then there are RT cranes or rough terrain cranes they are moved on a semi to and from the job site and usally require no assebley thats all i know about i cant say how a tower crane is build iv never see one build hope this helps
Big cranes do have to be disassembled into truck sized pieces for transport, and then reassembled on site. Usually, this is done by smaller cranes, which are mobile. Sometimes a big crane can be assembled on the ground with small cranes, and then lift itself into the air. Sometimes smaller cranes are assembled by bigger cranes on the site. Some of the biggest cranes are tower cranes, which sit on tob of a skinny tower and rotate around. These are assembled on the ground and then lift themselves into the air by building the tower under themselves. Look at the attached link to see how this is done.
