Hi vapilot2004...
quote
"It's an engineering decision based on design loads and the composition of the item I suppose.
These appear to be some sort of light alloy."
unquote
My response all along has been and remains...
"So does the rest of the aircraft,
and along with many other design decisions, is the reason I won't fly in any airbus!"
You know..."If it ain't....."
nuf said
Cheers...FD...