What is the minimum number of anchor bolts required for a wood sill plate longer than 12 feet?

The minimum number of anchor bolts required for a wood sill plate longer than 12 feet is guided by construction codes and standards that aim to ensure the structural integrity and safety of buildings. For a sill plate that exceeds 12 feet in length, the code typically specifies that at least one anchor bolt shall be used for each end of the sill plate, along with additional bolts spaced at regular intervals along its length.

In general practice, for wood sill plates longer than 12 feet, the requirement often lies around four anchor bolts: two at the ends and two spaced in between to ensure adequate support and prevent movement during wind loads or seismic activity. This configuration helps distribute forces evenly and adds stability to the framing system.

Choosing four anchor bolts aligns with these safety standards and provides a solid foundation for the structure, making this the correct answer. It is critical for construction supervisors to be familiar with these standards, as they play a significant role in the safety and longevity of the buildings being constructed.