User blog comment:Unownshipper/Metallurgists Wanted: Rapture's Natural Resources/@comment-75.36.142.53-20140810162926/@comment-75.36.139.103-20140811133750

The later BD types could have ADAM Tonics to handle the pressure. If before ADAM the suits couldnt have any cloth legs (we saw suits hanging in AE Depot of that wrong kind).

Anyway materials - probably not so much -  Aggregate for concrete (sand gravel) are easy

but most everything else (including the cement for concrete)  just could/would cost alot extra because of well-under-optimal production using  lousy quality materials (even on the surface 'good' materials only come from limited places). And the quantities required are pretty large.

Melted basalt (with its own difficulties) might still be better than most else.