Topic
construction
2 questions tagged construction — spanning every one of the seven Ws.
how
How Do Tunnel Boring Machines Dig Tunnels?
A tunnel boring machine grinds through rock and soil with a rotating cutter head while lining the tunnel behind it with concrete segments.
engineeringconstructionmachines
how
How Do Tower Cranes Build Themselves Taller?
Tower cranes grow taller using a climbing frame that hydraulically lifts the top of the crane so a new mast section can be inserted beneath it.
engineeringconstructionmachines