Originally Posted by
supermasterphil
In a given compartment, the same item doesn't take more or less space just because you turn in sidewards unless you block an area behind the item that can't be used afterwards.
So really, you don't take more or less space of the overhead bin, just because you put the trolley in straight or sidewards.
Thank you Mr. Math.
I believe most on here realize that regardless of how one places their carryon in the overhead bin, the same amount of volume is taken since the size of the carryon did not change. However, as you also state and as the OP stated as a concern, the
usuable space in the bin may be changed due to how a carryon is stored.