Thread by @Bharathgyan

Contrary to just mentioning in passing, the Ramayana has detailed verses explaining the construction of the bridge. The steps followed by Rama in constructing the bridge seem to be no different from those employed by modern day civil engineering & construction companies.
#Setu

The Ramayana text poetically describes the study of the site conditions by Rama and His team, for a path to cross over to Lanka.

The survey of the conditions of the sea is described as an interaction between Rama and the divinity of the sea, Samudra Deva.

#RamaSetu

During this interaction with the sea, they gathered that it was in the nature of these seas to be deep & not shallow, to have waves & fierce sea creatures in them. Given this, it was essential to find a path where Rama & the Vanara army would find it easy to cross the sea.
#Setu

This again has been poetically described as the Sea Divinity, Samudra Deva, yielding to Rama and showing Him the path from where, it would be easiest, to cross over.
#RamaSetu

Nala, who till then had been a part of the Vanara army introduces himself to Rama, presents his credentials and asks for permission to build this bridge over the seas as he has the technical capabilities to do so.
#RamaSetu

Nala, introduces himself as the biological descendant of Vishwakarma, an architect par excellence and offers his services for the design and construction of a bridge.
#RamaSetu

“I am a son born of Vishwakarma. I am equal to Vishwakarma. This divinity of Ocean has reminded me. The gr8 ocean spoke the truth. Being unasked, I have not told you my details earlier. I am capable of constructing a bridge across ocean. Let d foremost of Vanara build the bridge”

On the advice of Nala, the Vanara then piled different varieties of trees & then large boulders followed by smaller stones to create a causeway over the sea in 5 days, over which they crossed & reached Lanka.
The detailed description of the construction is given in Ramayana
#Setu

It is pertinent to point out here, the usage of the term, “mechanical contrivances” in the poetry. The word used in original literature is Yantraha, meaning mechanical devices. It is evident that mechanical devices were used then by the Vanara to transport huge boulders & trees.

After surveying d sea & identifying undulating outcrop frm seabed, Vanara leveraged d outcrop & piled on it, diff varieties of trees, some in bloom during that period, to create wood cushion & then large boulders followed by smaller stone to create a causeway over d sea in 5 days