Coastal and Floodplain Construction Inspector's Practice Exam

What is the Fb value for a #1 Hem-Fir 2 X 6 Wood Structural panel?

1. 1,200 psi

2. 1,800 psi

3. 2,000 psi

4. 1,600 psi

The correct answer is: 1,600 psi

The Fb value, or bending strength value, is a critical property used in engineering to ensure that wood structural panels can safely support the loads applied to them. For a #1 Hem-Fir 2 X 6 wood structural panel, the Fb value is established based on the species, grade, and dimensions of the wood. In this case, the #1 Hem-Fir grade is commonly recognized for its strength and versatility in construction applications. The specific value of 1,600 psi is standard for this configuration, indicating that it can withstand a maximum bending stress of 1,600 pounds per square inch before failure occurs. This value is crucial for designers and engineers when calculating load limits and ensuring structural safety. Other listed values — such as 1,200 psi, 1,800 psi, and 2,000 psi — either pertain to different grades or species of wood, or are incorrect for this particular classification of wood structural panel. Understanding these values aids in selecting the right materials for construction while maintaining compliance with engineering standards.