I've seen wings on test rigs in pics (Whittaker I think) all loaded
up with concrete blocks, on trestles. I have a couple of questions
if the techies are in the mood:

The positioning of the trestles surely affects the test? (If you put
the test load above the trestles only, you won't prove much) If so,
should support only be at the very tip of the wing?

How is the load distributed?

How much deflection is allowed?

Do testers stop at the +6g (if the correct figure), or are they
compelled to test ultimate strength?

Are wings tested attached to the fuselage, or individually?

Do other bits get tested this way? Tail, fuselage etc?

Finally, can the clever clogs doe all this with really hard sums?

Clearly I'm not busy enough on a Sunday night!

Cheers,

Colin