Mansueto by the Numbers


Robotic crane in automated storage and retrieval system
Mansueto Library automated storage and retrieval system
Photo by Tom Rossiter

Number of bins for storing books and journals: 24,000

Number of shelf racks for storing archival boxes and elephant folios: 1,200

Number of cranes retrieving bins and shelf racks: 5

Height of cranes: 50 feet

Typical book retrieval time: 5 minutes

Number of cubic yards of material removed to make room for the basement: 53,000

Number of panels comprising the slurry wall: 26

Thickness of the slurry wall: 30 inches

Number of tie-backs used to support the wall: 334

Thickness of the basement floor: 2 feet

Depth of the basement floor: 55 feet

Level of the bedrock under Mansueto: 60-75 feet below ground level

Temperature of basement (maintained for preservation purposes): 60ºF

Relative humidity of basement (maintained for preservation purposes): 30%

Above Ground

Grand Reading Room with soaring elliptical glass dome
Mansueto Library Grand Reading Room
Photo by Tom Rossiter

Height of the dome at the highest point: 35 feet

Length of Mansueto: 240 feet

Width of Mansueto: 120 feet

Number of glass panels on Mansueto’s dome: 691

Layers of glass in each panel: 3

Percentage of UV rays filtered by all dome glass: 99%

Percentage of solar heat rejected by glass: 73%

Percentage of visible light admitted by glass: 50%

Size of each panel: Approximately 2 x 2 meters

Number of rounded panels of glass in the dome: 0

Number of seats in the Grand Reading Room: 180

Coldest temperature that can be reached by Conservation Laboratory freezer (used to treat books that are wet, moldy or infested with insects): –40ºF

Sound frequency of Conservation Laboratory ultrasonic welder (used to weld sheets of stable polyester film for enclosure and protection of fragile items): 20 kHz

Average time needed to scan a typical book with the Digitization Laboratory’s Zeutschel book scanner: 30 minutes