Issue 1 V1.08
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Welded Connections > Moment on PP Butt Welds (2 Plates)

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Partial Penetration Weld Stress

Notation and Units

Metric and Imperial Units

The above welding stress equations may be used with both imperial and metric units. As with all mathematical calculations care must be taken to keep consistent units throughout. Examples of units which could be adopted have been provided below:


  • h = weld thickness, in or mm
  • L = length of welds, in or mm
  • M = bending moment, or Nmm
  • T = plate thickness, in or mm
  • σ = stress in weld, psi or MPa