Basic Data Home Office Code

For a 1 Mt ground burst at a distance of 1.6 km from ground zero  

Dynamic shear stress (mild steel) 172 N /mm Protective factor 4000 Concrete/cu (static) 30 N/mm (grade 30) Concrete/cu (dynamic) l.Sfy ju = 37.5 N/mm Reinforcement /cu (static) 420 N/mm Reinforcement/u (dynamic) 1.10 = 462 N/mm Young s modulus, Eq 20 GN/m  

Slab thickness 300 mm (with minimum cover 50) Blast load 0.17 N/mm/ F t) = Pdo 

Later on, based on finite-element analysis, the T20-200 bars adopted were checked 

Calculated thickness of steel doors = (118/100)20 = 23.6 25 mm A 25 mm thick door was adopted. 

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