Which of the following is used to attach roof plates, sills, etc., to masonry work?

Anchor bolts are specifically designed for securely attaching structural elements, such as roof plates and sills, to masonry work. They provide a solid connection that can withstand various loads and help ensure the stability of the structure. Typically embedded in the masonry, these bolts create a strong anchorage point that can be critical for the overall integrity of the building.

While nails, screws, and brackets might be used for attaching various building elements in different contexts, they are generally not suitable for direct attachment to masonry due to the material's hardness and the necessary load-bearing requirements. Nails and screws may not provide the same level of strength or stability when fixing elements to masonry compared to anchor bolts. Brackets can serve as connectors, but they also rely on strong fixed points like anchor bolts for sturdiness. Hence, anchor bolts are the preferred choice for this purpose.