Civil Engineering / Subcategory
Structural
Structural engineering calculators and formulas for beams, columns, and load-bearing elements. Covers bending moment, shear force, deflection, and buckling load calculations.
8Formulas
All levels Difficulty
Updated Jul 2026
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Fundamental
Beam Deflection (Simply Supported, Center Point Load)
δ = P*L³ / (48*E*I)
Fundamental
Simple Column Axial Load Capacity
P = 0.4*fck*Ac + 0.67*fy*Asc
Fundamental
Steel Reinforcement (Rebar) Weight
W = (D² / 162) * L
Fundamental
Roof Pitch (Rise over Run)
Pitch = Rise / Run
Fundamental
Staircase Rise-to-Run Ratio
2R + T = 600 to 640 mm (comfort rule)
Fundamental
Shear Stress in a Beam
τ = VQ / Ib
Fundamental
Euler's Buckling Load
P_cr = π²EI / (KL)²
Fundamental
Bending Stress in a Beam
σ = M·y / I