Derivation of steel weight calculation D²/162

Derivation of steel weight calculation D²/162

Derivation:
   W = c/s area × density of steel × length of steel
        = (π/4 × D²) × 7850 ×1
        = (3.14 × D²/4) × 7850
        = 6162.25 D²
        =D²/ 1.6227 × 10-⁴

[ 1m = 1000 mm ]
 
        = D²/ 1.6227 × 10-⁴ × 1000²
        = D²/ 162.27
   W = D² / 162
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