🔩 TYPES OF REINFORCING BARS (REBAR) – SIZES & DIAMETERS

Reinforcing bars (rebars) are steel bars embedded in concrete to improve tensile strength and structural performance.

📏 1. STANDARD US REBAR SIZES

No. 3 – 9.5 mm (3/8")
No. 4 – 12.7 mm (1/2")
No. 5 – 15.9 mm (5/8")
No. 6 – 19.1 mm (3/4")
No. 8 – 25.4 mm (1")
No. 10 – 31.8 mm (1¼")
No. 12 – 38.1 mm (1½")

🏗️ 2. COMMON APPLICATIONS

1️⃣ No. 3 & 4 – Stirrups, ties and slabs.
2️⃣ No. 5 & 6 – Beams, columns and foundations.
3️⃣ No. 8 – Heavy structural reinforcement.
4️⃣ No. 10 & 12 – Bridges and major infrastructure.

📌 3. IMPORTANT ENGINEERING NOTES

✅ Select bar sizes according to structural calculations.
✅ Check steel grade and yield strength.
✅ Maintain adequate concrete cover.
✅ Follow proper anchorage, development and lap lengths. ✅ Never change rebar sizes without engineering approval.

⚠️ Note: Rebar sizes and standards vary by country. Always follow applicable design codes and project specifications.

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