Structural engineering drawings can look intimidating — dense with numbers, symbols, and annotations. But understanding the basics helps you communicate with your engineer and builder more effectively.
Key Drawing Types
- General Arrangement (GA) — shows the overall layout of structural elements: beams, columns, walls, foundations
- Foundation Plan — details the size, depth, and reinforcement of foundations
- Steelwork Details — specifies beam sizes (e.g. 203×133×25 UB), connections, and bearing plates
- Sections — vertical 'slices' through the building showing how elements stack and connect
Common Symbols
- UB = Universal Beam (I-shaped steel beam)
- UC = Universal Column (H-shaped steel column)
- RC = Reinforced Concrete
- T10, T12, T16 = reinforcing bar diameters in mm
- CL = Centre Line
If anything on your drawings is unclear, ask your engineer. A good structural engineer will walk you through the key details and explain what your builder needs to know.
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