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eng.spring-system Calculator
Calculates equivalent spring stiffness for series and parallel spring combinations, and the deflection under a given load. Springs in parallel have additive stiffness; springs in series have reciprocal additive flexibility — the opposite of electrical resistors.
Inputs
K1
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
K2
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
K3
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Load N
Applied force or weight (N or kN). Divide into dead load (permanent) and live load (variable — people, wind, etc.).
Results
series stiffness (N/m)
Sample size or count used in the calculation.
parallel stiffness (N/m)
Sample size or count used in the calculation.
series deflection (mm)
Maximum lateral displacement of the beam under load. Codes typically limit to L/360 for floors (to avoid cracking finishes) or L/240 for roofs. Excessive deflection signals the beam is undersized.
parallel deflection (mm)
Maximum lateral displacement of the beam under load. Codes typically limit to L/360 for floors (to avoid cracking finishes) or L/240 for roofs. Excessive deflection signals the beam is undersized.