1. the system of parallel horizontal beams (joists) used to support floors or ceilings in construction
Usage: construction; architecture

Examples

• The contractor inspected the joisting before installing the subflooring.
• Proper joisting is essential for structural integrity.
• The old house had exposed joisting in the basement ceiling.
• They reinforced the joisting to support the heavy tile floor.
• The architect specified 16-inch spacing for the floor joisting.
• Water damage had weakened the joisting in the kitchen.