Xyz Designed with precise interlocking wooden joints, Xyz is a modular pop-up furniture. Its demountable and waives of any additional fasteners. Just like Japanese wooden houses, this system avoids diagonals, but uses precise fitted joints and plywood surfaces for stability. The modular furniture is based on a cubical tatami ratio (45.5 x 45.5) and composed of solid birch wood beams with pine tree plywood surfaces. Xyz consists of three different carved beam types. They vary in length based on the modular unit. Each joint is locked by a wedge or accurate fitted plywood surfaces with continues slots. The surfaces appear in different shapes and sizes. They create horizontal surfaces for display and alignment of the overall composition.