Construction of the $1.23-billion Kingdom Tower—a proposed 3,280-foot-tall tower with 200 floors—has begun and developers are faced with many challenges, including how to pump concrete more than half a mile into the sky.
Read MoreConstruction of the $1.23-billion Kingdom Tower—a proposed 3,280-foot-tall tower with 200 floors—has begun and developers are faced with many challenges, including how to pump concrete more than half a mile into the sky.
Read More