John I don't think you have ever clarified anything in your life, because you have been too busy talking and giving your opinion. I gave the answer to what a working aisle was in my submission in about one sentence. I did it because the first two responders started talking about Right Angle Stacking Aisle which is not what the questioner wanted.
You then chose to pontificate and confuse the **** out of the situation with a paragraph full of the most B.S. I have seen in a long time.
The one that had me rolling on the floor was machining tolerances in the racks! What do you think this is NASA? By the time you add in all the variables of the pallets, where they are placed onto the racks, the rubbish in the aisles none of your stuff makes any difference.
But it does fill the air around your orifice.
Read what the questioner is asking, see if anybody has answered it and if they haven't try and answer it in as easy and succint fashion as possible. Without being a know it all. That's all you have to do without all this negative attention seeking.