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Automated Storage and Retrieval System (ASRS)

Automated Storage and Retrieval System

A unique feature of the Oviatt Library is the Automated Storage and Retrieval System (ASRS) in the east wing, the first ever ASRS for libraries. Originally referred to as Leviathan II, ASRS was constructed between 1989 and 1991 at cost of $2 million.

The ASRS consists of 13,260 steel bins, each 2' x 4', on a rack structure that occupies an 8,000 sq. ft. room at forty feet high. Bin height varies at either 6”, 12”, 15”, or 18”. The ceiling of the room is at the level of the ceiling of the main floor of the Library. The bins are arranged on both sides of six aisles, each of which has a "mini-load crane," guided by rails at top and bottom.

All bound periodicals (except for a few select titles) and books that have been used infrequently are stored in the bins. Their bar codes are mapped to their bin locations in the ASRS Manager computer system.  The capacity of the ASRS is 1.7 million volumes and is currently at 91% capacity.

Requests for retrieval of ASRS items are submitted via the Library catalog, and are transmitted electronically to the ASRS Manager, which directs the automatic crane in the appropriate aisle to deliver the bin to a pickup station on the mezzanine at main floor level. The approximate location of the book in the bin is displayed on a terminal at the pickup station, along with author, title, and bar code.

The last two digits of the bar code of each book were written on the top edge when it was stored, allowing the ASRS operator to find the book easily. The operator reads the bar code in the book with a barcode scanner to confirm that it has been picked up, and delivers the book to the Guest Services desk.

Time from initial request to availability at the Guest Services desk is under ten minutes.

In the Northridge Earthquake on January 17, 1994 almost 100% of the library's open shelf collection was dumped on the floor. Not one book in the ASRS was damaged. No bin was in danger of falling.

Although ASRS server software was developed in 1991, a major upgrade was completed in 2011 to improve the system’s controller, communications, and horizontal/vertical positioning. Companies involved with construction, maintenance and upgrades included Eaton-Kenway, Inc., HK Systems Inc., Dematic, and Bastian.

References:

“Robosupport Staff 1.” Library Mosaics, July/August 1990.

Helen Heinrich and Eric Willis, “Automated Storage and Retrieval System: a Time-tested Innovation.” World Library and Information Congress: 78th IFLA General Conference and Assembly, 22 June 2012.