Glossary of Structural Elements I T Ss a Ip Rv Pi Se Historic Pre

Glossary of Structural Elements I T Ss a Ip Rv Pi Se Historic Pre

m u l u c i r r u C M n is o s Glossary of Structural Elements i t ss a ip rv pi se Historic Pre Arch – a curving Compression - smashing; pushing together structure used (the opposite of tension). to span openings in a wall: wedge- Compression Ring – a ring holding its shape shaped pieces because its members are in compression, (voussoirs) that pressing toward each other. lean against each other in Dome – a three- compression. dimensional form based on Barrel Vault – a continuous surface of semi- a circle, the top circular or pointed sections; basically a series of a dome is in of arches set side-by-side forming a half compression cylinder. while the bot- tom of a dome is in tension. Flying Buttress – a but- tress with a non-struc- tural section removed to give it the appear- ance of lightness. Buttress – a small, Gravity - the force of attraction between two support wall at a right massive objects; commonly understood as angle to another wall to the downward pull of the earth that makes counteract the outward objects feel heavy. thrust of a heavy roof or wall. Load - weight of something being supported. Curriculum Developed By Mississippi Heritage Trust Cantlever – Post and Beam – One of the earliest methods PHYSICAL: 600 East Amite Street, Suite 201 a beam sup- of building, it includes any structure built of Jackson, MS 39201 ported only vertical posts that hold up beams laid horizon- MAILING: P.O. Box 577 at one end. tally across them. Jackson, MS 39205 PHONE: 601-354-0200 FAX: 601-354-0220 Column – an EMAIL: [email protected] upright (ver- ONLINE: www.mississippiheritage.com tical) support This project has been made possible with member. funding from the American Architectural Foundation, the Mississippi Arts Commission and the Mississippi Humanities Council. Mississippi Historic Preservation Curriculum l ©2008 Mississippi Heritage Trust l Glossary of Structural Elements Glossary of Structural Elements Post and Lintel – basic principle used to span openings in a wall to accommodate doors or windows: two vertical posts supporting a horizontal beam (lintel). Span - the distance between to objects (noun); to cross the distance between two objects (verb). Stress - the way a material reacts to weight; the two forms of stress are tension and compression. Support - to hold something up. Tension - stretching; pulling apart (the opposite of compression). Tension Ring – a ring holding its shape because its members are in tension, pushing away from each other. Thrust - a strong push in a certain direction. Truss – a system of support members that are held rigid by utilizing a series of triangles. Weight – the measurement of the earth’s gravitation- al pull on an object; heaviness. m u l u c i r r u C M n is o s i t ss a ip rv pi se Historic Pre Mississippi Historic Preservation Curriculum l ©2008 Mississippi Heritage Trust l Glossary of Structural Elements l Page 2.

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