What framing material is commonly required for headers in door openings?

The use of solid wood for headers in door openings is commonly required due to its strength and structural integrity. Headers are critical components in framing, as they are designed to support the weight of the structure above them when openings are created for doors and windows. Solid wood headers provide the necessary load-bearing capacity to effectively transfer weight and help maintain the overall stability of the wall system.

Additionally, solid wood is relatively easy to work with, affordable, and widely available, making it a standard choice in residential construction. While engineered wood can also be used in some situations, solid wood headers remain the most traditional and frequently applied material for this specific purpose in framing applications. The other materials listed, such as metal studs, plywood, and even engineered wood, may serve different functions in construction but do not typically fulfill the role demanded of headers as effectively as solid wood.