For those with general knoledge of Titanic's fatal flaws and me
![Grin ;D](http://forum.shipsim.com/Smileys/default/grin.gif)
:
What type of iron rivets were used instead of the standard No. 4 iron and steel rivets?
This rivet type made te steel plate open like a zipper when their heads popped off from the gental bumping.