Bent bars may have the same size and length but be different shapes. How are they clearly distinguished?

• A. A mark number of its own
• B. A color code
• C. A bundling tag
• D. A stamped size

Answer: (A)

When bars are the same size and length but have different bend shapes, you need a unique identifier on each piece to tell them apart. A distinct mark number is stamped or etched onto the bar, linking it to its specific bend pattern and the corresponding detail in the shop drawings. This provides a precise reference for fabrication and installation, so the correct shape is placed in the exact location required. Color codes can indicate general information but aren’t precise enough for individual bars, bundling tags identify bundles rather than the specific bar, and stamped size only notes the gauge, not how it’s bent. So using a unique mark number on each bent bar gives clear, traceable identification.