Dado furniture by Allen Kaufmann Architekten uses no glue, screws or brackets

Dado, Berlin studio Allen Kaufmann Architekten's flat-pack range, uses no glue, screws or brackets. Solid-timber parts lock through patented 45-degree dado joints, narrow trenches that take another piece. One joint holds a vertical, horizontal and two diagonal braces at one point, Dezeen reports. Readers voted it furniture design of the year in the Dezeen Awards.