We used to have pull strength as a part of rework simulation in the board specification, but the fillet on the bottom side acts as a little anchor and
prevents the solder plug from pulling out.  After many years of having no
failures that part of the test was dropped.

I could go back and look at 55110 A, B or C prior to rev 5 to find out the
values to be met, if you really need them.

Susan Mansilla
Robisan Lab