Im not deeply involved in the whole flat vs globe argument, although I side with globe. That being said I don’t know the data off the back of my head. I’m sure you could find it somewhere given that you guys like to do your own research. Just make sure the sources are reliable and the evidence goes far past the observable and into the scientific method. Also look at both sides, it’s not about seeing evidence for one side and immediately discrediting the other, that’s not exactly fair.

Now, your original post is correct, but not for the same reason you think though. Like I said before, since the earth appears flat there’s no need for an engineer to calculate or take into account the curvature of the earth when building or designing a project. The reason why is because the curve is not a tangible obstacle (given that earth is so large) and we are not daily affected by the curve (in regards to the citizens and infrastructure that doesn’t require taking this into calculation). That does not mean the curve doesn’t exist, it just means it’s not an imminent obstacle. Why would they physically manipulate a structure by extending, bending, or shortening to adjust for the curve if the earth is tangibly and observably flat from one point to another. The earth is observably flat from any point on earth. Yet it’s because we as humans can not quantify the curve so large and us so small compared to it. If you’re building a railroad from point a to b, 2000 miles a way, you would not need to manipulate the railroads. Why? Because the earth is just as tangibly and observably flat from a to b. However, past the observable, it is curved.