North Carolina Building Contractor License Practice Exam

What distance apart should max spans of rafters be in feet?

1. 2 feet

2. 4 feet

3. 6 feet

4. 8 feet

The correct answer is: 6 feet

Rafter spans are crucial elements in roof framing as they support the weight of the roof and any additional loads such as snow or equipment. The maximum spacing of rafters is typically determined by both the size of the rafters and the type of roofing materials being used. In many standard residential construction practices, rafters are commonly spaced at six-foot intervals to maintain structural integrity. This spacing allows for adequate support without increasing the risk of sagging or failure while also adhering to local building codes and industry standards. It ensures that the weight load is distributed evenly across the structure. Spanning rafters too far apart can lead to inadequate support and potential failure, making six feet a recognized standard in many cases, particularly for conventional residential roofing systems. This standard is established based on various factors, including the type of wood, the grade, and the expected load on the roof.