Which type of drawing allows for changes and revisions before the final draft is approved?

The type of drawing that accommodates changes and revisions before the final draft is approved is known as working drawings. These drawings serve as the primary foundation for the detail and instruction in a project, allowing for modifications during the development phase. Working drawings include specifications, dimensions, and notes that guide the construction or fabrication process, making them essential for collaboration among engineers, architects, and fabricators.

During the drafting phase, working drawings can be reviewed and altered based on feedback and observations. This iterative process allows for adjustments that enhance clarity, accuracy, and alignment with project goals. Once these changes are made, they can lead to more detailed final drawings that incorporate any learned insights from the working drawings.

Shop drawings, in contrast, are more detailed submissions created by contractors or manufacturers that reflect specific portions of the project. They typically follow the working drawings and include the means of fabrication or installation but are less flexible to major changes. Final drawings are the completed and approved versions that do not allow for revisions. Assembly drawings depict how parts fit together but are also finalized and are meant for clarification rather than ongoing modification.