The Bridge of Khazad-dum

[HerenIstarion]

I've been rereading LoTR recently and the following stroke me as something I haven't noticed and haven't pondered over before:

Book II, Chapter 5

This is the Second Hall of Old Moria; and the Gates are near: away beyond the eastern and, on the left, not more than a quarter of a mile. Across the Bridge, up a broad stair, along a wide road, through the First Hall, and out!

Gandalf peeping out of the passage to the rest of the Ring's company

I'll risk playing a fool, for this thread is nearly three years old, but only now it dawned upon me that there were no need for any carriages (wheeled carts or else) to be hauled across the bridge. They would easily be collected in the First Hall, which is stated below in the same chapter as having huge [broken] doors and than the goods were to be brought across as need be and divided into as many portions as dwarves would wish them to be and than brought across the bridge in no hurry