As Builts

Definition

As-builts are a set of drawings prepared by the general contractor that include any revisions made to the original working drawings and specifications during construction. These drawings accurately reflect how the project was actually constructed, documenting any changes from the initial design.

Purpose

The purpose of as-builts is to:

• Provide an accurate and detailed record of the final constructed project, including all modifications and adjustments made during construction.
• Serve as a reference for future maintenance, renovations, or expansions, ensuring that any subsequent work is based on the true, completed structure.
• Facilitate effective communication and understanding among stakeholders, including owners, architects, contractors, and maintenance personnel.
• Ensure compliance with regulatory requirements and standards by documenting all changes and final conditions of the construction project.

Examples of Use

1. Building Construction:
   • As-builts are created for residential, commercial, and industrial buildings, documenting changes such as rerouted electrical wiring, plumbing modifications, or structural adjustments.
   • In large construction projects, as-builts provide a comprehensive record for facility managers to maintain and operate the building efficiently.
2. Infrastructure Projects:
   • For roads, bridges, and tunnels, as-builts detail modifications in alignment, materials, or construction techniques that occurred during the project.
   • Utility companies use as-builts to map out the actual locations of underground pipes, cables, and conduits for future reference.
3. Renovation and Remodeling:
   • During renovations, as-builts document the existing conditions of the structure before and after the changes, ensuring accurate records for future projects.
   • As-builts help architects and designers understand the current state of a building, allowing them to plan renovations that integrate seamlessly with the existing structure.

Related Terms

1. Working Drawings: The original set of detailed drawings used for the construction of a project, outlining specifications, dimensions, and materials.
2. Shop Drawings: Detailed drawings produced by contractors, subcontractors, or suppliers that show how specific components will be manufactured and installed.
3. Record Drawings: Similar to as-builts, these are drawings that reflect the completed project, incorporating any changes made during construction.
4. Field Changes: Modifications made to the project design while construction is ongoing, often documented in as-builts.
5. Redline Drawings: The marked-up version of working drawings showing changes made during construction, which are later incorporated into the as-built drawings.

Notes

• As-builts should be comprehensive and include all changes, no matter how minor, to ensure an accurate record of the final construction.
• The creation of as-builts typically involves collaboration between the general contractor, subcontractors, and design professionals to verify all modifications.
• Digital as-builts are increasingly common, allowing for easy updates, sharing, and storage of the final drawings.
• Properly maintained as-builts are invaluable for troubleshooting issues, planning future modifications, and complying with legal and regulatory requirements.