To transport visitors to the top floors, Westinghouse installed eight express elevators in the RCA Building. They moved at an average speed of and made up 13% of the building's entire construction cost. One elevator reached a top speed of and was dubbed "the fastest passenger elevator ride on record". These elevators cost about $17,000 a year to maintain by 1942. Rockefeller Center opened an observation deck atop the RCA Building's 67th, 69th, and 70th floors, above the future Rainbow Room, in July 1933. The only entrance to the observatory cut across the 65th floor, where the Rainbow Room would soon be located. The Rainbow Room was used as enticement for visitors to the observation deck, who were told that "if you behave and do your jobs right [...] when you die you'll go way up to the Rainbow Room."