 
Allowable joint tensile stress
 
Allowable joint shear stress
 
Joint tensile stress
 
Joint shear stress
 
Strength check
σ ≤ σ A and τ≤τ A
Minimum thickness of connected parts
s min = max {s 1 , s 2 }
where:
 
Meaning of used variables for metric units:
| S U | Joint strength in tension [MPa] | 
| k T | Tension safety factor | 
| S US | Joint strength in shear [MPa] | 
| k S | Shear safety factor | 
| F | Transferred force [N] | 
| b | Width of connected parts [mm] | 
| s | Thickness of connected parts [mm] | 
Meaning of used variables for English units:
| S U | Joint strength in tension [psi] | 
| k T | Tension safety factor | 
| S US | Joint strength in shear [psi] | 
| k S | Shear safety factor | 
| F | Transferred force [lb] | 
| b | Width of connected parts [in] | 
| s | Thickness of connected parts [in] |