Building of the Titanic Crossword

Fifteen of these were used and were watertight, connected to the shell plating
This was known as the 'spine' of the Titanic
The month of the year 1911 that the Titanic was ready to be launched
This was the erection of steel rib like structures that formed the skeleton of the ship
How many months did it take for the structure of the Titanic to be completely ready for launched?
The whole structure was held together by heated iron and steel pins called...
How many passenger decks were there?
How many moveable cranes had to be installed for the Titanic's construction?
The Titanic's construction was under the responsibility of this company
This was the name of the Titanic's sister ship
This enabled the rudder to pivot, thereby controlling the direction of the ship
This controlled the direction of the ship
The construction of the Titanic was undertaken in this month
How many decks in total were there?