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Caused by two oppositely directed forces acting on a body, tending to flatten it or reduce its length or thickness.

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These are formed by canvases stretched by compressed air. They have been developed in recent years and are used for pavilions and shelters. They are also used as emergency architecture for disaster. For an idea of what these structures are like, you can imagine a hot ballon or a pool float.

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These structure are held in place by stay cables, usually made from steel, attached to sturdy support. They are often found in bridges.

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These structures were invented by the architect Richard Buckminster fuller and patented in 1954. They are globe- Shaped structures formed by triangles that, in turn, form pentagon or hexagons. They can be regarded as a mixture of truss and vaulted structures.

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These are made up of sheets that form a protective housing and support.
Examples- The body of a car, the fuselage of an aircraft and the housing of a mobile phone.

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These structures are formed by bars arranged to form triangles or trusses.
They are lightweight but sturdy.

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Aqueduct of Segovia =Acueducto de Segovia

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Aqueduct of Segovia =Acueducto de Segovia

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Arches and vaults are formed by stone blocks supported by their own weight. They are used to cover a space between two pillars or walls. To distinguish between an arch and a vault, just remember that an arch is linear and a vault is superficial.

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These are constructed with lintels. A lintel is a horizontal beam placed on vertical supports used to cover spaces. Examples: the dolmens and temples of ancient Egypt (like that of Karnak) and classical Greece ( like the Parthenon)

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These are solid, heavy and very sturdy structures. Example:walls, dams and, in ancient times, pyramids (like the ones in Egypt and Teotihuacan).

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Skyscrapes, incluiding Burj Khalifa in Dubai (the world's tallest one at 828 metres) and New York's famous Empire State Building, which is the icon of the city and measures a much smaller but no less astonishing 381 m.

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A nest is a structure constructed by birds for breeding, and the shell of an egg is a very strong structure, although it is made from a brittle material

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A honeycomb is a structure formed by hexagonal cells, used to store larvae, honey and polen.

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Bridges, from the arch bridges used by the romands to the ones that we build today, including Danyang-Kunshan Grand Bridge (China), which is 168 km long.