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Mann Hall is typical of many modern structures of the 1960's, employing a reinforced concrete frame and infill panels of brick and glass. One of its unusual characteristics is the five-feet-thick concrete slab floor of the laboratory that has traditionally been used for structural testing. This four-story building with an area of 78, 266 square feet is the second to be named after Carroll Lamb Mann. The other building was incorporated into Daniels Hall in 1956.

As an extensive surveyor, Mann surveyed much unclaimed coastal land, and some of the early developments of Raleigh. He was a member of a U.S. government survey party that explored the possibilities of a canal to be built across Nicaragua. For a quarter of a century, he was secretary of the State Board of Examiners for Engineers and Land Surveyors. After graduating in civil engineering (Class of 1899), Mann later returned to NC State to head the Department of Civil Engineering for 47 years. He was also chairman, for 30 years, of the alumni memorial committee, which conceived and constructed the memorial tower.

"My greatest experience has been the work I have done on that tower," Mann once said. "When the time comes for me to die, the last thing I want to hear are the chimes on Memorial Tower at the College."