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The film's working titles were The High Tower and Bridges Built at Night. The film begins with the following written statement: "The growth of man's engineering achievements is written in gigantic structures of stone and steel which have surmounted the formidable barriers of gulf and raging torrents. To the bridge builders who courageously wrestle hundreds of feet above the earth with girders and cables of steel, night and day, in broiling sun and driving storm, we dedicate this picture...." Although Gene Lockhart's character is called "John Powers" in the credits, a newspaper headline in the film announcing the wedding of "Chuck" and "Helen" calls her father "Frederick Charles Powers."
Hollywood Reporter news items dated 15 May and July 15, 1941 note that shots of the collapse of the Tacoma Narrows Bridge in Tacoma, WA, were to be used in the film, and that Lew Seiler was to direct the picture. According to a brief article in American Cinematographer, icicles hanging from the film bridge were made from a combination of parafin and melted sugar. The film's story closely resembles that of the 1935 Warner Bros. film The Irish in Us (see AFI Catalog of Feature Films, 1931-40; F3.2158).