How do they build skyscrapers?

How do they build skyscrapers?

From the bottom up is my guess. It's a damn sight easier than from the top down.

Actually many are built both ways at the same time. To build in all the parking levels etc. but also quite often the central core is slipformed in concrete using climbing shutters and then the floors are built out from the core, sometimes starting out somewhere in the middle of the tower and going up and down concurrently. This way the core containing lift shafts and stairs for the permanent structure can be utilised in the temporary stages for access. There is also the use of Alimak type hoists (lifts) for men and materials

In answer to cranage, you would never lift 100T from ground to the upper floors. 2 to 5T would be a typical lift and yes you need to allow for the weight of the line from the jib to the ground and the wind forces on the load.
 
the real answer is that tall buildings don't really exist - its a squire white sheet and a lot of elaborate projectors.
Have you ever been in a tall building? When you get in a lift, trained monkeys rearrange the furniture so it looks like a new floor and the windows are high quality televisions - before 2005 display screens were not good enough so the views were matt paintings.
 
You break it down, large parts get helicopter off or service elevator for smaller parts.

Or they builds smaller crane to lower parts down then break down the smaller crane and elevator down.

What you should ask is how do Hong Kong build skyscrapers with bamboo sticks :p

Simple, just do it in minecraft then export!
 
I always wondered how high one might be able to build something like this...

https://en.wikipedia.org/wiki/The_Tower_of_Babel_(Bruegel)

out of conventional stone/masonry.

(As to the question regarding the desirability of living in one of those Megacity-Pyramids

Urgh! :( )


Assuming you have an adequate foundation spread and strength, the height achievable would be dependant on the wall thickness, allowable compressive (uniaxial) strength of the rock or brickwork, similarly the binder or mortar used, the horizontal wind loading and any out of verticality tolerances achieved. Generally tall masonary structures have a steel skeleton and a practical height for pure brickwork was probably reached by victorian mill chimney builders

It would be extremely unlikely to worry heaven in any respect IMO.
 
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