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15/01/2026

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15/01/2026

14/01/2026

Column, Beam & Slab Design (ACI, Eurocode, IS & BNBC Code)

COLUMN DESIGN – IMPORTANT POINTS

• Minimum column size: 230 mm × 230 mm
• Minimum reinforcement: 0.8% of gross cross-sectional area
• Maximum reinforcement: 6% of gross area
• Minimum number of bars: 4 (rectangular), 6 (circular)
• Clear cover: 40 mm
• Design considers axial load with bending moment

BEAM DESIGN – IMPORTANT POINTS

• Minimum beam width: 230 mm
• Effective depth ≈ Span/12 to Span/15
• Main tension reinforcement at bottom
• Shear reinforcement (stirrups) is mandatory
• Clear cover: 25 mm
• Deflection and crack control checks required

SLAB DESIGN – IMPORTANT POINTS

• Minimum slab thickness: 100–125 mm
• Main steel along short span
• Minimum reinforcement: 0.12% for HYSD bars
• Clear cover: 20 mm
• Span/depth ratio used for deflection control
• Applicable for one-way and two-way slabs

DESIGN CODES USED

• ACI 318 – American Concrete Institute Code
• Eurocode 2 (EN 1992) – European Concrete Code
• IS 456 – Indian Standard Code of Practice
• BNBC 2020 – Bangladesh National Building Code