Plug and Slot Welds

Axial Force on Perpendicular Plug Weld formulas
$\tau_b \;=\; \dfrac{ P }{ 0.5 \cdot d^2 \cdot n }$ $\tau_p \;=\; \dfrac{ P }{ 2.2 \cdot d \cdot t \cdot n }$
Symbol	English	Metric
$\tau_b$ (Greak symbol tau) = shear stress in weld base area	$lbf\;/\;in^2$	$Pa$
$\tau_p$ (Greak symbol tau) = shear stress in weld peripheral area	$lbf\;/\;in^2$	$Pa$
$d$ = diameter of plug weld	$in$	$mm$
$n$ = number of welds	$dimensionless$	$dimensionless$
$t$ = plate thickness	$in$	$mm$
$P$ = total axial force	$lbf$	$N$

Axial Force on Bevel Plug Weld formulas
$\tau_b \;=\; \dfrac{ P }{ 0.8 \cdot d^2 \cdot n }$ $\tau_p \;=\; \dfrac{ P }{ 3.1 \cdot d \cdot t \cdot n }$
Symbol	English	Metric
$\tau_b$ (Greak symbol tau) = shear stress in weld base area	$lbf\;/\;in^2$	$Pa$
$\tau_p$ (Greak symbol tau) = shear stress in weld peripheral area	$lbf\;/\;in^2$	$Pa$
$d$ = diameter of plug weld	$in$	$mm$
$n$ = number of welds	$dimensionless$	$dimensionless$
$t$ = plate thickness	$in$	$mm$
$P$ = total axial force	$lbf$	$N$

Axial Force on Perpendicular Slot Weld formulas
$\tau_b \;=\; \dfrac{ P }{ 0.7 \cdot w \cdot L \cdot n }$ $\tau_p \;=\; \dfrac{ P }{ 1.4 \cdot t \cdot L \cdot n }$
Symbol	English	Metric
$\tau_b$ (Greak symbol tau) = shear stress in weld base area	$lbf\;/\;in^2$	$Pa$
$\tau_p$ (Greak symbol tau) = shear stress in weld peripheral area	$lbf\;/\;in^2$	$Pa$
$L$ = length of welds	$in$	$mm$
$n$ = number of welds	$dimensionless$	$dimensionless$
$t$ = plate thickness	$in$	$mm$
$P$ = total axial force	$lbf$	$N$
$w$ = width of weld	$in$	$mm$

Axial Force on Bevel Slot Weld formulas
$\tau_b \;=\; \dfrac{ P }{ w \cdot L \cdot n }$ $\tau_p \;=\; \dfrac{ P }{ 2 \cdot t \cdot L \cdot n }$
Symbol	English	Metric
$\tau_b$ (Greak symbol tau) = shear stress in weld base area	$lbf\;/\;in^2$	$Pa$
$\tau_p$ (Greak symbol tau) = shear stress in weld peripheral area	$lbf\;/\;in^2$	$Pa$
$L$ = length of welds	$in$	$mm$
$n$ = number of welds	$dimensionless$	$dimensionless$
$t$ = plate thickness	$in$	$mm$
$P$ = total axial force	$lbf$	$N$
$w$ = width of weld	$in$	$mm$