What is Construction Documents (CD)?

Construction documents are a detailed set of drawings and written instructions that show exactly how a project should be built and cover everything from the layout to the materials and systems.

Definition

Construction Documents, or CDs, are a stage in the design process that is almost finished, with most of the decisions already made. At this point, the drawings and specifications are detailed enough to guide actual construction. This usually means that the design is about 90% done.

Purpose

Construction documents act as the main source of truth on a project. Contractors, subcontractors, and site teams depend on them to know what needs to be built, how different parts fit together, and what rules to follow to help keep things consistent, cut down on confusion on the job site, and make sure the finished project matches the original design.

Examples of Use

Architectural plans: Show how the building will look from different angles and levels, as well as how it will be built.
Engineering drawings: Specifications for electrical, plumbing, and structural systems.
Material specifications: List the exact materials, finishes, and standards that are needed for the whole project.

Related Terms

BIM uses data-rich 3D models to help teams design, coordinate, and manage buildings more efficiently throughout the project lifecycle.

Notes

Construction Documents are essential for getting permits and approvals before construction begins.
They also play a key role in compliance, cost estimation, and coordination between teams.
As the project moves forward, these documents may be revised to reflect changes, updates, or site conditions.

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Process

Drawings

Tools

Systems

Materials

Building Parts

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