What is the relationship between knee walls and ceiling joists?

The relationship between knee walls and ceiling joists is one of load transfer and structural support. Knee walls, which are short walls commonly found in spaces like attics, often serve the purpose of providing vertical support for the ceiling joists above them. When a knee wall is constructed, it effectively helps to stabilize the ceiling joists by transferring loads and providing an additional point of support in the overall framework of the building.

This connection is crucial because ceiling joists need to distribute the weight of the roof structure and any other loads acting upon them. By having knee walls in place, the weight that would otherwise be solely on the ceiling joists is shared, enhancing the stability and strength of the overall structure. Therefore, the interaction between knee walls and ceiling joists plays a vital role in maintaining the integrity of the roof system and ensuring safety and durability in architectural design.