Civil Engineering Calculator

Calculate concrete quantities, steel reinforcement, structural loads, and construction materials

Engineering Calculations

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Civil Engineering Fundamentals

Concrete Calculations

Essential calculations for concrete construction:

  • Volume = Length × Width × Thickness
  • Include wastage factor (typically 5-10%)
  • Standard concrete grades: C20/25, C25/30, C30/37
  • 1 cubic metre of concrete weighs approximately 2,400 kg

Steel Reinforcement

Steel reinforcement calculations and standards:

  • Bar weight = (D²/162) × Length (where D is diameter in mm)
  • Standard bar diameters: 8, 10, 12, 16, 20, 25, 32, 40mm
  • Lap length typically 40-50 times bar diameter
  • Minimum cover: 25mm for slabs, 40mm for beams

Structural Loads

Understanding load calculations and factors:

  • Total Load = Dead Load + Live Load
  • Design Load = Total Load × Safety Factor
  • Dead loads: permanent fixtures, self-weight
  • Live loads: occupancy, furniture, equipment
  • Safety factors typically range from 1.4 to 2.0

Construction Materials

Bricks
Standard: 215×102.5×65mm
~500 bricks per m³
Concrete Blocks
Standard: 440×215×100mm
~12.5 blocks per m²
Mortar
1:4 ratio = 1 cement : 4 sand
~0.3m³ per 1000 bricks
Aggregates
Fine: 0-4mm (sand)
Coarse: 5-20mm (gravel)