A baluster is a vertical support element used in railings and guardrails to provide safety, structure, and decorative detail.

A baluster is a vertical post or spindle that supports a handrail or guardrail system and helps prevent falls from elevated surfaces. Balusters are commonly used in staircases, balconies, decks, porches, and terraces as part of a railing assembly.

In construction, balusters can be made from a variety of materials including wood, metal, glass, concrete, or composite products. Their spacing, height, and strength are regulated by building codes to ensure safety, particularly in areas where fall protection is required. Proper installation is essential to maintain structural integrity and meet code-compliant guardrail requirements.

Beyond their structural function, balusters also contribute to architectural style and aesthetics. They may be simple and functional in commercial projects or decorative and ornate in residential and historic construction. Regardless of design, balusters must be securely anchored and capable of withstanding required loads.

The term “baluster” comes from the Greek word for pomegranate flower—early balusters were shaped to resemble its curved form.