What is the main purpose of anchor bolts in a foundation?

The primary purpose of anchor bolts in a foundation is to connect the sill plate to the foundation. This connection is crucial because it helps secure the structural integrity of the building by keeping the wooden framework in place during both lateral and vertical loads. Anchor bolts provide stability and help prevent movement caused by factors such as wind, seismic activity, or settling of the foundation. By firmly anchoring the sill plate to the concrete or masonry foundation, they ensure that the entire structure maintains its alignment and strength over time, contributing to the overall safety and durability of the building. Other options, such as insulation or allowing movement, do not accurately capture the role of anchor bolts in the foundation system.