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Structural log members must have a grade mark from what type of organization?

  1. Commercial lumber distributors

  2. A lumber grading agency

  3. The builder themselves

  4. No requirement needed

The correct answer is: A lumber grading agency

Structural log members must have a grade mark from a lumber grading agency to ensure that the wood meets specific quality and safety standards suitable for construction purposes. Lumber grading agencies are responsible for assessing and certifying the quality of the wood based on its structural integrity, strength, and overall suitability for use in building projects. The grade mark serves as an assurance to builders and inspectors that the lumber has been inspected and meets the criteria set forth in building codes, which is crucial for maintaining safety and adherence to industry standards. This grading process helps prevent the use of substandard materials that could lead to structural failures in construction. Therefore, obtaining a grade mark from a recognized lumber grading agency is an essential step in the use of structural log members.