Residential Building Inspector Practice Exam 2025 – Comprehensive Test Prep

Solid sawn headers must comply with the requirements set forth in DOC PS 20, which is the American Lumber Standard for the grading and certification of lumber. This standard is critical for ensuring that the lumber supplied for construction meets specific structural and quality standards essential for safety and performance in building applications.

By adhering to DOC PS 20, solid sawn headers are subjected to rigorous inspection and grading processes that confirm their reliability as load-bearing elements in construction. This standard encompasses structural lumber and provides guidelines on the acceptable dimensions, strength characteristics, and allowable uses of the lumber, thus making it a vital certification for headers used in residential buildings.

The other certifications mentioned do not pertain specifically to the grading of solid sawn lumber used in headers. Each of those standards—DOC PS 10, DOC PS 30, and DOC PS 40—relates to different categories or types of materials or products, making them inappropriate for this specific context. Therefore, DOC PS 20 is the correct and relevant certification for solid sawn headers.