Fifteen cubits upward did the waters prevail simply means that the highest point on earth was covered by a height of 15 cubits of water.
I disagree with this and don't think that your construction is supportable from the context. But then that is my opinion.
I stated that we were assuming a cubit was 18 inches to prevent this type of post.
And I merely stated that I feel there is a problem with that assumption. The point of your original post is to compare Noah's ark with a modern box car. I just think it's fallacious to do so using an 18" cubit when that concept comes from the Egyptian rule of measure and there is no support anywhere to assume it was the same for Noah's time (assuming we take it as a given that this was a real event).
If I caused you any anger I apologize.
No anger here. I just like rational discussion and dialogue. It's ok if two people disagree.
Lets go back and do the math with an 18" cubit please.
I don't see the point. Again, I don't see this as a rational comparison. With that lacking, this just becomes a 7th grade math problem.
Also I noted that you referenced Widest point. Are you assuming from the text that the Ark was to be built as anything other than a box shape? If so what is your reason for believing such?
It is an assumption that the arc was built in
anyshape. We just don't know. Here's
my assumption: God told him how to build it. God would know the best way to build a ship. Two theories: 1)A ship without a keel and stem is very weak, or in other words, the strongest way to build a sea going vessel is with a keel and a stem. A keel and stem cannot be put on a boat that is a perfectly rectangular vessel.
2) If Noah built it sitting on the ground, then it started to rain, a box-like vessel would not be buoyant when filled with weight. The surface area to weight ratio is wrong. If you make it curved like modern boats though, the surface area to weight distribution would allow it to float freely. There is no evidence to support him building it on stilts.