
Again, as discussed in the comments, this might be done in stages with light versions first that support later, heavier versions.
A stone bridge built on top of the wooden bridge. As discussed in the comments, this might be done in stages with a light version built first, and then reinforced. A wooden bridge built with the help of the rope bridge but in the curved shape of the final bridge. A rope bridge that starts with throwing ropes to helpers on the other side of the chasm and attaching them to something firm. I'm no dwarf, but if I were handed this as a problem to solve, I would build the bridge in stages: We are simply told that it isĪ slender bridge of stone, without kerb or rail, that spanned the chasm with one curbing spring of fifty feet. Tolkien doesn't describe how the bridge was constructed. The Two Towers Book III Chapter 5: "The White Rider" Far, far below the deepest delving of the Dwarves, the world is gnawed by nameless things. They were not made by Durin's folk, Gimli son of Glóin. Ever he clutched me, and ever I hewed him, till at last he fled into dark tunnels. 'We fought far under the living earth, where time is not counted. 'Deep is the abyss that is spanned by Durin's Bridge, and none has measured it,' said Gimli. It's worth remembering that Dwarves are preternaturally skilled miners, carvers, and stone-workers techniques that seem impossible to us are not necessarily beyond their abilities.ġ It's doubtful, though not impossible, that they carved the whole thing, since Gimli says that none know how deep it goes, and Gandalf discusses tunnels at that depth not made by Dwarvish hands: No sign was there of post or lintel or threshold, nor any sign of bar or bolt or key-hole yet they did not doubt that they had found the door at last. It was not a cave and was open to the sky above but at its inner end a flat wall rose up that in the lower part, close to the ground, was as smooth and upright as mason's work, but without a joint or crevice to be seen. BRIDGE OF KHAZAD DUM CRACK
Ilently a great doorway was outlined, though not a crack or joint had been visible before.įellowship of the Ring Book II Chapter 4: "A Journey in the Dark"
`They are invisible, and their own masters cannot find them or open them, if their secret is forgotten.' 'Dwarf-doors are not made to be seen when shut,' said Gimli. Here are the Doors? I can't see any sign of them.' Such a technique is used to hide their doors, including the West-gate of Moria itself: However, I would question the claim that the Dwarves couldn't have constructed a bridge that looked like (and was as strong as) a single, unbroken piece of stone. As proposed in the question itself, it could have been a natural "bridge", merely shaped by the Dwarves into the shape they wanted.As proposed by HorusKol and maguirenumber6, it may actually be built out of stone blocks, but the seams are either hidden by Dwarf-craft or too faint for us to see.As proposed by amaranth, they could have dug out the cavern around the bridge, potentially uncovering a larger, natural cavern below 1.Any of the possibilities discussed in the question comments are feasible: No writings I've been able to find discuss the construction of the bridge in any level of detail.