The construction of the RMS Titanic began on March 31, 1909, at the Harland & Wolff shipyard in Belfast, Ireland. The shipyard employed around 14,000 to 15,000 men during the peak of construction. The building process involved more than 3,000,000 rivets to hold the steel plates in place, with the plates mostly 1.5 inches thick. Titanic was built under a massive gantry that stood 228 feet tall, the largest in the world at that time.
The construction spanned approximately 26 months from keel laying to launch, culminating with the launch on May 31, 1911. The ship's total cost was around $7.5 million in 1912, equivalent to approximately $166 million today. The ship was 882 feet 9 inches long, 92 feet 6 inches wide, and 175 feet tall from keel to the top of the funnels, with a gross tonnage of 46,328 tons.
Titanic's propulsion system included two reciprocating steam engines and one low-pressure turbine, driving three propellers. The central propeller was 17 feet in diameter and weighed 22 tons, while the two wing propellers were 23.5 feet in diameter and each weighed 38 tons.