What is used to provide additional information about materials and specifications on a blueprint?

In the context of blueprints, information blocks are specifically utilized to convey additional details about materials and specifications, effectively summarizing necessary data for construction and design. They often include specifics like material types, grades, or quantities, aiding contractors and builders in understanding the requirements without cluttering the main drawings.

Legends primarily serve to explain symbols used in the drawings, helping to decode graphical representations. Detail drawings focus on showing intricate aspects of a design, often at a larger scale, to clarify how components fit together. Annotations are generally used to provide notes and instructions directly on the drawing itself, offering context but not necessarily acting as a structured source of specification like information blocks do. Thus, while all these elements play important roles in a blueprint, information blocks stand out for their purpose in conveying detailed material specifications.