Strength of Attachment Welds. Stiffening ring attachment
welds shall be sized to resist the full radial pressure
load from the shell between stiffeners, and shear loads
acting radially across the stiffener caused by external
design loads carried by the stiffener (if any) and a computed
radial shear equal to 2% of the stiffening ring’s compressive
load. See Example L-5 of Appendix L