Deck Heights and thickness of the decking iron?


Pardon me if this is in the wrong section, been a long time since I lurked here / things seem to have become more nuanced in their categorizing in that time.

I am modeling the titanic in a 3D sandbox game, and this site has been fantastic for information, but there is one thing I am struggling to find information on: thickness of the decking iron. In another thread, I found the heights of each deck, parts of each deck, but what is the thickness of the decking iron, and how would this affect the given measurements (for example, the 9ft given in the thread I found for the height between A and B deck)?