A baluster is a vertical, often decorative, post or spindle that supports the handrail of a staircase, balcony, or railing system. Typically made from wood, metal, stone, or other materials, balusters are installed in a series to form a balustrade, providing both safety and aesthetic appeal. In architectural and construction contexts, especially in Australia, balusters must comply with local building codes regarding spacing, height, and strength to ensure safety and structural integrity.