A rectangular column or pier attached to a wall that provides structural support and architectural detail to building facades.

A pilaster is a rectangular column or pier that is attached to or built into a wall, projecting slightly from the wall surface to provide both structural support and architectural detail to building facades. Unlike freestanding columns, pilasters are integral parts of the wall system and serve dual purposes as load-bearing elements that help support vertical loads from floors, roofs, or other structural elements above, while also providing visual rhythm, proportion, and classical architectural character to building exteriors and interiors. Pilasters are commonly found in various architectural styles and can be constructed from masonry, concrete, wood, or other materials depending on the building type and design requirements.

Pilasters are used in various architectural and structural applications including masonry wall construction where they provide additional structural support for long wall spans and help resist lateral forces, classical and neoclassical building designs where they create visual divisions and architectural hierarchy on facades, commercial and institutional buildings where they support heavy floor and roof loads while maintaining architectural continuity, residential construction where they provide structural reinforcement at critical points such as corners and openings, and interior applications where they serve as decorative elements that also provide structural function. Each application requires consideration of both structural requirements and architectural design intent.

The construction and design of pilasters involve several key considerations including structural analysis to determine required dimensions and reinforcement based on applied loads and wall height, architectural proportions that follow classical orders or contemporary design principles to achieve proper visual scale and rhythm, material selection that complements the wall construction while providing adequate structural capacity, connection details that ensure proper load transfer between the pilaster and adjacent wall elements, and integration with other building systems such as windows, doors, and mechanical equipment. The pilaster must be designed as an integral part of the overall wall system.

Fun Fact: Pilasters were first used extensively in ancient Roman architecture and were later revived during the Renaissance, with the term coming from the Latin “pilastrum,” meaning a small pillar or column attached to a wall.