What does 'creep' refer to in the context of structural materials like wood and concrete?

Creep is a phenomenon that describes the gradual deformation of materials when subjected to constant load over time. This is particularly relevant for structural materials like wood and concrete, which can experience slight, continual changes in shape or size as they endure stress.

For wood, creep can manifest as bending or sagging over the years, depending on the amount of load and environmental conditions. In concrete, especially under heavy loads or in long beams, creep can lead to subtle but significant changes in dimensions, affecting structural integrity and overall performance. Understanding creep is crucial for engineers and architects, as it impacts the design and longevity of structures, ensuring safety and stability under long-term loads.

This understanding helps foster effective design practices that account for material behavior over time, enabling architects to create safer and more durable infrastructures.