What is the minimum screw penetration length into wood?

The correct choice reflects that the minimum screw penetration length into wood should be at least half of the screw's length. This depth ensures a strong mechanical connection between the screw and the wood, which is critical for maintaining structural integrity and load-bearing capacity. When a screw is driven into wood, the threads need to engage sufficiently to provide adequate grip without risking the screw pulling out under load or stress. Penetrating half the length of the screw into the wood establishes a reliable hold, as it allows for enough thread engagement in the denser material, ensuring stability and strength for the assembled components.

Understanding this concept is essential for both practical applications and adherence to building codes, which often stipulate minimum fastening requirements to promote safety and compliance in construction projects.