"Richard Smith" wrote in message ...

....
If "H" is a tension "doubler", not otherwise part of the beam "Second
Moment of Area", then just fillets at the ends would do?
Maybe small fillets along sides, out to edges of the "C" (channel)
sections?
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As a separate element H is only a little stronger than the lower channel
flange, because it has slightly more area and is further from the neutral
axis, but as part of V it more than doubles the second moment. I think shear
causes the difference.

I couldn't accurately measure these channels until a few days ago when I
sawed off the end plates (they were pallet rack shelves) and removed the
rust.