I understand that generally speaking for the Kallax/Expedit, it's best for the structural integrity of the unit if the longer shelf pieces lie horizontally and the shorter shelf pieces go vertically.
This shelf can be used vertically with inserts and drawers to make a shelf full of storage and open display areas too.Bryan said: ↑.
Another configuration of the Kallax is the 3X4 cubes. Ikea Kallax 3×4 Hack: Storage shelf for Living Room. The directions from My Outdoor Plans are very clearly laid out, with labeled parts, precise measurements, and instructions.10. This entire build should cost you less than $50. These 2 x 4 Shelving Plans by My Outdoor Plans are some of the simpler shelving units we could find.