Issue 1 V1.08
Details Here

Simple Beam - Two Equal Point Loads Unequally Spaced

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StructX Calculator
Beam Calculator Input Units:
Length of Beam, L:
Distance to Load, a:
Distance to Load, b:
Load on Beam, P:
Point of interest, x:
Resultant, R1=V1:
Resultant, R2=V2:
Shear at x, Vx:
Moment, M1:
Moment, M2:
Moment at x, Mx:
Remember: 1m = 1000mm ; 1N/mm = 1000N/m ; 1Nm = 1000Nmm
1ft = 12in ; 1lbf.ft = ; 12lbf/ft = 1lbf/in

The above beam force calculator is based on the provided equations and does not account for all mathematical and beam theory limitations. The calculator has been provided with educational purposes in mind and should be used accordingly. Unit conversion

Simple Beam - Two Equal Point Loads Unequally Spaced

Need a excel spreadsheet for designing the above beam, click Here!

Notation and Units

Metric and Imperial Units

The above beam design formulas may be used with both imperial and metric units. As with all calculations care must be taken to keep consistent units throughout with examples of units which should be adopted listed below:


  • FBD = free body diagram
  • SFD = shear force diagram
  • BMD = bending moment diagram

  • a & b = distance to point load, in or m
  • E = modulus of elasticity, psi or MPa
  • I = second moment of area, in4 or m4
  • L = span length under consideration, in or m
  • M = maximum bending moment, or kNm
  • P = total concentrated load, lbf or kN
  • R = reaction load at bearing point, lbf or kN
  • V = maximum shear force, lbf or kN
  • x = horizontal distance from reaction point, in or m