Wich would be the cost, for a handmade bicycle builder, of a high end steel tubeset like Reynolds 853 and what are the size options for the headtube (i.e1 1/8, 1.5, tapered.)?
They use 'walking cranes'- Wiki itThe two spars can be used with the hoist to raise the assembly to the top level by level.
Didn't you ever look at one being built? There are at least one, maybe 2-3 large cranes at the top.
Tower Cranes, Boom trucks, some have elevaters built and keep building them as they go along, what do I know lol, !!
Yep, cranes lift a lot-steel, concrete buckets, even workers (rarely)Cranes are begun with small lifts near the ground, and assembled in piecesThe highest ones climb up the beams floor by floor as the skyscraper risesWhen the top is built, the crane is taken apart and pieces lowered by a very small craneThen that one is taken apart and comes down an elevator.
You can get just about any option normally available with an 853 tubeset BUT if you live anywhere outside of the UK you can't buy a full 8 tube setAll you can get is 3 main tubes and make no mistake- they are EXPENSIVEEDIT: Heres the problem with steel swingarms- they move around (flex) much more than an aluminum oneI suggest that you use standard race-car grade straight gauge 4130 chrome molybdenum.
