40 Hour Property and Building Inspection Practice Test

What must be ensured for proper end bearing in rafters and ceiling joists on masonry?

1. 1 inch minimum

2. 2 inches minimum

3. 3 inches minimum

4. 4 inches minimum

The correct answer is: 3 inches minimum

For rafters and ceiling joists that bear on masonry, ensuring a proper end bearing is essential for structural integrity and load distribution. The minimum requirement for bearing on masonry is typically 3 inches. This provides adequate support to transfer loads effectively from the rafters or joists into the masonry, minimizing the risk of failure or excessive deflection. This 3-inch requirement takes into consideration various factors such as the potential for settling or movement in the masonry and the need to distribute loads across a sufficient area. Inadequate bearing could lead to cracking or movement within the structure, compromising overall stability. Therefore, maintaining this minimum bearing length is a fundamental aspect of building code compliance and structural design. Other measurements, such as 1 inch, 2 inches, or 4 inches, do not meet the established standards for bearing on masonry and may not provide the necessary safety margin required for effective load transfer. Thus, the 3-inch minimum is recognized as a standard in building practices to ensure stability and integrity in roof and ceiling framing systems.