Height-Adjustable 2×4 Post Systems: Technical Overview and Applications Height-adjustable post systems are an innovative Japanese solution for creating temporary walls, partitions, or shelving structures without drilling or permanent fixtures. These systems are based on a simple mechanical principle: compression between the floor and the ceiling. By combining a section of standard 2×4 timber (approximately 38 × 89 mm) with a height-adjusting mechanism at the top or bottom, a stable vertical support can be formed in minutes. Learn more about building a temporary wall room here. Equipment you will need: Drill and 2x4. Optional: Plasterboard