What do "as built" drawings refer to?

"As built" drawings refer to the final drawings of actual construction, which accurately reflect all changes made to the project during the construction process. These drawings document the completed design, detailing how the project was ultimately built, including any variations from the original design plans. This documentation is critical for future renovations, maintenance, or repairs, as it provides a clear representation of the constructed facility with precise measurements, materials used, and locations of structural elements.

The other choices relate to earlier stages of the construction process. Preliminary sketches and design plans created before construction starts are used in the planning phase, while specifications for materials outline what is required, but they do not represent the completed structure. Therefore, understanding that "as built" drawings capture the final state after all modifications and actual construction is essential for effective project management and future reference.