Total Dead Load on a Concrete Slab
Easydead loadunit weightslab
A concrete floor slab is 180 mm thick with unit weight 24 kN/m³. Finishes add 1.2 kPa and permanently attached services add 0.5 kPa; these are all the dead-load components. Occupancy live load is excluded. What is the total dead load per square meter of floor?
- A2.13 kPa
- B5.52 kPa
- C6.02 kPa
- D4.82 kPa
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Answer: C. 6.02 kPa
Equation: D = γt + finishes + services. Inputs: t = 180 mm = 0.18 m, γ = 24 kN/m³. Substitution: slab = 24(0.18) = 4.32 kPa, so D = 4.32 + 1.2 + 0.5 = 6.02 kPa (1 kPa = 1 kN/m², so area loads add directly). Wrong: 2.13 kPa uses t = 0.018 m (millimeter conversion slip: 0.432 + 1.7); 5.52 kPa drops the 0.5 kPa permanent services; 4.82 kPa drops the 1.2 kPa finishes. No live load belongs in dead load.
kPa
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