Engineering:Granary

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Short description: Storage building for grain
A simple granary (early 19th century), Slovenia

A granary is a storehouse or room in a barn for threshed grain or animal feed. Ancient or primitive granaries are most often made of pottery. Granaries are often built above the ground to keep the stored food away from mice and other animals and from floods.

Early origins

Ancient Greek geometric art box in the shape of granaries, 850 BC. On display in the Ancient Agora Museum in Athens, housed in the Stoa of Attalos.

From ancient times grain has been stored in bulk.[1] The oldest granaries yet found date back to 9500 BC[2] and are located in the Pre-Pottery Neolithic A settlements in the Jordan Valley. The first were located in places between other buildings. However beginning around 8500 BC, they were moved inside houses, and by 7500 BC storage occurred in special rooms.[2] The first granaries measured 3 x 3 m on the outside and had suspended floors that protected the grain from rodents and insects and provided air circulation.[2]

These granaries are followed by those in Mehrgarh in the Indus Valley from 6000 BC. The ancient Egyptians made a practice of preserving grain in years of plenty against years of scarcity. The climate of Egypt being very dry, grain could be stored in pits for a long time without discernible loss of quality.[1]

Historically, a silo was a pit for storing grain. It is distinct from a granary, which is an above-ground structure.

East Asia

Granary model, Han dynasty

Simple storage granaries raised up on four or more posts appeared in the Yangshao culture in China and after the onset of intensive agriculture in the Korean peninsula during the Mumun pottery period (c. 1000 B.C.) as well as in the Japanese archipelago during the Final Jōmon/Early Yayoi periods (c. 800 B.C.). In the archaeological vernacular of Northeast Asia, these features are lumped with those that may have also functioned as residences and together are called 'raised floor buildings'.

China built an elaborate system designed to minimize famine deaths. The system was destroyed in the Taiping Rebellion of the 1850s.[3][4][5]

Southeast Asia

Leuit, Sundanese traditional granary, in West Java, Indonesia.

In vernacular architecture of Indonesian archipelago granaries are made of wood and bamboo materials and most of them are built raised up on four or more posts to avoid rodents and insects. Examples of Indonesian granary styles are the Sundanese leuit and Minang rangkiang.

Great Britain

A granary sitting on staddle stones, at the Somerset Rural Life Museum

In the South Hams in southwest Great Britain, small granaries were built on mushroom-shaped stumps called staddle stones. They were built of timber frame construction and often had slate roofs. Larger ones were similar to linhays, but with the upper floor enclosed. Access to the first floor was usually via stone staircase on the outside wall.[6]

Towards the close of the 19th century, warehouses specially intended for holding grain began to multiply in Great Britain. There are climatic difficulties in the way of storing grain in Great Britain on a large scale, but these difficulties have been largely overcome.[1]

Modern

Modern grain farming operations often use manufactured steel granaries to store grain on-site until it can be trucked to major storage facilities in anticipation of shipping. The large mechanized facilities, particularly seen in Russia and North America are known as grain elevators.

Examples

Moisture control

Grain must be kept away from moisture for as long as possible to preserve it in good condition and prevent mold growth. Newly harvested grain brought into a granary tends to contain excess moisture, which encourages mold growth leading to fermentation and heating, both of which are undesirable and affect quality. Fermentation generally spoils grain and may cause chemical changes that create poisonous mycotoxins.

One traditional remedy is to spread the grain in thin layers on a floor, where it is turned to aerate it thoroughly. Once the grain is sufficiently dry it can be transferred to a granary for storage. Today, this can be done by means of a mechanical grain auger to move grain from one granary to another.

In modern silos, grain is typically force-aerated in situ or circulated through external grain drying equipment.

See also

  • Hambar
  • Hórreo
  • Horreum
  • Raccard
  • Storage silo
  • Corn crib
  • Groote Schuur, the stately South African home was originally a granary.
  • Rice barn
  • Treppenspeicher
  • Ghorfa
  • Parish granary

References

  1. 1.0 1.1 1.2  One or more of the preceding sentences incorporates text from a publication now in the public domainZimmer, George Frederick (1911). "Granaries". in Chisholm, Hugh. Encyclopædia Britannica. 12 (11th ed.). Cambridge University Press. p. 336. 
  2. 2.0 2.1 2.2 Kuijt, I.; Finlayson, B. (June 2009). "Evidence for food storage and predomestication granaries 11,000 years ago in the Jordan Valley". Proceedings of the National Academy of Sciences of the United States of America 106 (27): 10966–10970. doi:10.1073/pnas.0812764106. ISSN 0027-8424. PMID 19549877. Bibcode2009PNAS..10610966K. 
  3. Will, Pierre-Etienne; Wong, R. Bin (2020-08-06) (in en). Nourish the People: The State Civilian Granary System in China, 1650–1850. University of Michigan Press. doi:10.3998/mpub.19044. ISBN 978-0-89264-091-1. https://hdl.handle.net/2027/fulcrum.0c483m200. 
  4. Edgerton-Tarpley, Kathryn Jean (2014-05-01). "From "Nourish the People" to "Sacrifice for the Nation": Changing Responses to Disaster in Late Imperial and Modern China" (in en). The Journal of Asian Studies 73 (2): 447–469. doi:10.1017/S0021911813002374. ISSN 0021-9118. https://www.cambridge.org/core/product/identifier/S0021911813002374/type/journal_article. 
  5. Shiue, Carol H. (2004-03-29). "Local Granaries and Central Government Disaster Relief: Moral Hazard and Intergovernmental Finance in Eighteenth- and Nineteenth-Century China" (in en). The Journal of Economic History 64 (1): 100–124. doi:10.1017/S002205070400261X. ISSN 0022-0507. https://spot.colorado.edu/~shiue/Shiue%20proofs1.pdf. 
  6. "Barn Guide: Traditional Farm Buildings in the South Hams: Their Adaptation and Re-use". http://www.stoneroof.org.uk/historic/Historic_Roofs/South_Hams_slating_files/barn_guide_2004.pdf.  The Barn Guide by South Hams District Council