# Welded Connections > Force on PP Fillet Welds (2 Plates Lapped)

# 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:

# Notation

- h
_{1}= h_{2}= size of weld/plate, in or mm - l = length of welds, in or mm
- P = total axial force, kip or kN
- σ = stress in weld, psi or MPa