How many Steel bars in a 18″×24″ (450mm×600mm) column
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providing Steel 1% of gross area of concrete in 18″ x 24″ (450mm×600mm) size rcc column, the minimum iron rod/ steel bars, it could be 12 nos (combination of 2nos of 12mm,6nos of 16mm & 4nos of 20mm), or 14nos (combination of 4nos of 16mm, 4nos of 20mm & 6nos of 12mm) of steel bar used, provided with stirrups of 10mm steel rings at a distance of 150mm (6″) centre to centre of Fe500 grade of Steel and M20 grade of concrete ratio 1:1.5:3 and providing clear cover of 40mm.
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