Anchor bolts are embedded in walls to support which of the following?

Anchor bolts are typically embedded in walls to provide a secure attachment point for structural elements, particularly vertical loads. In the context of the options presented, posts are the primary structural components that require robust anchoring. Posts support beams or girders, transferring loads down to the foundation or floor system.

The use of anchor bolts for posts ensures that these vertical elements remain stable and do not shift under load, particularly in scenarios involving lateral forces such as wind or seismic activity. Proper anchoring is essential for maintaining the overall integrity of the structure.

While beams, columns, and shelves can also interact with various forms of anchoring, the specific focus on posts aligns with the typical use of anchor bolts in construction. Each of these structural elements plays a role, but the anchor bolt's most critical application is to secure posts effectively, making this the most appropriate answer.