The Titan III launch facilities at CCAFS were built as part of an Integrate-Transfer-Launch approach intended to enable a rapid launch rate. Titan vehicles were assembled and integrated with their payloads off-pad and then transported by rail to one of the two pads. The Titan III facilities included both LC-40 and LC-41, assembly buildings including the Vertical Integration Building, and the first rail line at the Cape. The facilities were completed in 1964 and the first launch from LC-41 was of a Titan IIIC, carrying four separate payloads, on December 21, 1965.