Understanding the different types of engineering drawings is essential for smooth project execution and coordination. Here’s a quick overview of the most common drawing types used across the industry:

1️⃣ Design Drawings (DD)
High-level drawings prepared by the consultant to show the overall concept, layout, and intended design. These are not fully detailed but set the foundation for all later stages.

2️⃣ Tender Drawings (TD)
More detailed drawings issued during the tender stage. They define the project scope, quantities, and specifications, enabling contractors to price the work accurately.

3️⃣ IFC Drawings (Issued for Construction)
The official, fully coordinated drawings approved by the consultant and issued for actual site construction. Contractors must follow these precisely.

4️⃣ Shop Drawings
Detailed drawings prepared by contractors and suppliers showing how elements will be fabricated and installed. They include exact dimensions, materials, and methods, and must be reviewed and approved before execution.

5️⃣ Coordination Drawings
Integrated drawings combining Architectural, Structural, and MEP systems to avoid clashes. Essential for ensuring everything fits together before construction begins, especially in BIM projects.

6️⃣ As-Built Drawings
Drawings updated to reflect the actual installation or construction on site. They capture all changes made during execution and are crucial for operation, maintenance, and future modifications.

7️⃣ Record Drawings
Final, consultant-verified versions of the As-Built drawings submitted at handover. These represent the official completed state of the project.

8️⃣ Red-Line Drawings
Markups made by site teams during construction to document any deviations from IFC drawings. These form the basis for preparing the final As-Built drawings.

9️⃣ Fabrication Drawings
Highly detailed workshop drawings used to manufacture components such as steel structures, ductwork, piping, and joinery. Issued to factories for production.