Coastal and Floodplain Construction Inspector's Practice Exam

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What is the maximum allowable notch size at the tops of timber posts and piles?

  1. 25% of the cross-section

  2. 50% of the cross-section

  3. 75% of the cross-section

  4. 100% of the cross-section

The correct answer is: 50% of the cross-section

The maximum allowable notch size at the tops of timber posts and piles is 50% of the cross-section. This limit is established to ensure that the structural integrity of the timber is not compromised. Allowing notches larger than this percentage can significantly weaken the posts and piles, leading to potential failure under load, especially in coastal and floodplain construction where structural stability is critical due to environmental factors such as wind and water pressure. By adhering to this standard, engineers and inspectors can help maintain the strength and durability of timber structures, providing safety and longevity in construction practices.