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That seems very unlikely to me. Reckon it's alternate spacing for some reason.
Well yes, quite.
so shouldn't need to be as strong as you'd need for shelves etc.
They bear less weight, but the loading changes frequently, there’s more leverage and folks overload them - which is why they always fuck dry wall if not fixed correctly.
Howard
That seems very unlikely to me. Reckon it's alternate spacing for some reason.
Being fixed on each side of the rail means there's no force pulling the fixings away from the wall. They only have to cope with the vertical component, so shouldn't need to be as strong as you'd need for shelves etc.