What is the common spacing, in inches, for rafters?

The typical spacing for rafters in residential construction is commonly 16 inches on center. This spacing is preferred because it provides a balance between structural integrity and load distribution while optimizing material efficiency during the framing process. It allows for standard sheet materials like plywood and drywall to fit neatly between the rafters without needing additional cutting or modification.

Although some rafters may be spaced at 24 inches on center in certain constructions, the more conventional and widely recognized standard remains at 16 inches. Spacing rafters too far apart could lead to structural weaknesses and inadequate support for roofing materials, which can pose safety and durability concerns over time.

By understanding this standard spacing, builders can ensure that their roofing systems are both strong and efficient, conforming to building codes and practices.