Weld group capacity (elastic method)
Calculate the capacity of a weld group using the elastic stress method

Output:
- Definitions
- ϕw = Resistance factor for welds
- Mu = Factored moment (kip*ft)
- Nu = Axial load; Tension positive (kip)
- Tu = Factored torsional moment (kip-ft)
- Vu = Factored shear force (kip)
- b = weld group width (in)
- d = weld group depth, height, or diameter (in)
- r = distance from centroid to weld, for calculating torsion stress (in)
- fRu = resultant stress (kip / in)
- Calculate the geometric properties of the weld group
- yc = d / 2 = 12 in
- J = (b+d)3 / 6 = 7776 in3
- Scx = bd + d2/3 = 480 in2
- Aw = 2d + 2b = 72 in
- rmax = Sqrt((b/2)2+(d/2)2) = 13.416 in
- Calculate the unit stress from each applied load
- fPu = Nu/Aw = 0 kip / 72 in = 0 kip/in
- fVu = Vu/Aw = 0 kip / 72 in = 0 kip/in
- fMu = Mu/Sxx = 0 kip-in / 480 in2 = 0 kip/in
- fTu,max = Tu rmax / J = 0 kip-in / 7776 in2 = 0 kip/in
- Calculate the peak resultant stress using vector combination
- Note: fTu added to fVu (assumed to act in same direction)
- fRu = sqrt([fTu + fMu]2 + [fVu + fTu]2 ) = 0
- Calculate the required weld size
- Use weld with strength of 0 kip/in
Notes: