The Riga Bench –

The Riga bench is articulated, allowing the user to fold it into a large coffee table or stretch it out into a 23 ft bench with many possibilities in between.  Made of LVL, structural beam material.

See how it was made here

RigaBench (9 of 15) RigaBench (6 of 15)
RigaBench (11 of 15) RigaBench (5 of 15)
RigaBench (7 of 15)

See below a Youtube video demonstrating the movement of the Riga Bench: