I know this subject is slightly engineerish in nature, but since it's considered past, I decided to ask my questions here.

I've understood that the ancient Inca used not only quipu to communicate/organize but also utilized massive ropes to build bridges across canyons and likely for other tasks as well. I know of Q'iswa Chaka, the bridge locals keep rebuilding to this day, but I think I read somewhere that the Spanish wrote of significantly larger ropes that were (partially) made of leather, unlike the pure reed/hay/grass bridges of today. If this was the case, what else if anything is known of the materials used in the "original" ropes? Have any of them been discovered by archaeologists?

How about other applications? I've understood the inca did not have wheels (to utilize pulleys), but perhaps they used ropes in other ways for leverage/transportation/other. Any known methods?

I know there's a barrage of questions here so I'm more than happy to get new insight to even one of them. My current knowledge is basically limited to this video, but am googling around "as we speak."

Bonus: Was it Caral or some other earlier Peruvian culture (more to the coast of Peru) that had these coarse "webs" made of grass rope, filled with stones and used as building elements not unlike sandbags?