O'Neill colony construction

ANTIcarrot wrote:

> I've read about how you could obtain the materials, where'd you build
> them and why it's not likely in the immediate future - but nowhere
> have I been able to find out any engineering data for these vast
> structures.
>
> How much would they weigh? What materials could be used aside from
> concrete?

You really wouldn't want to use concrete; it can't take tensile forces-
and habitats are pressure vessels which are tensile structures. You'd
want to use basalt or metal or something else with a high tensile
strength (even carbon fiber in principle).

> Assumming the infrastructure was in place how quickly could the second
> Island 3 O'Neill colony be built once they learn all their mistakes
> from building the first?

Depends on how much money you have.