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science (chapter 11 test)
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- 1Foundation Failure-Failure of the base or foundation on which the structure is built.
Poor ground conditions, base not big enough for structure. - 2Extrodinary Loads-Extreme weather conditions.
Unexpected events. - 3Faulty Constuction-Use if poor materials.
Poor installation, sloppiness, rushing for due dates, no experience. - 4Bad DesignDesign errors such as not accounting for the load, incorrect materials, not considering stresses.
- 5Structural Failure-When a part of a structure loses the ability to support.
- 6Domes-Looks like half a sphere.
Forces are directed outwards and downwards in many places at once.
Domes are a series of many arches connected in the centre.
Encloses a lot of space and cover large areas underneath.
VERY strong but costs a lot. - 7Arches-Curved structure used to support loads.
Used where beams are not practical, needed or wanted where architectural components are more appealing.
transfers compression forces downwards and outwards only in one plane.
Some have been standing for 2000 years.
Strong - 8Trusses-A network of beams that form many triangles
Used as a cantilever, bridge or support
Very often used as a frame or skeleton of structures
Forces are distributed between the points of the triangles
Triangles help support the weight - 9Gusset-A flat, plate-like support that is usually triangular.
- 10Strut-Angular support below a beam.
sturt and show the junk=below beam - 11Tie-Angular support above a beam.
sturt but dont show me no junk=above the beam - 12Rebar(reinforced bars)-
Rebar helps by resisting both compression and tension. - 13How to strengthen the beam-Change the material to strengthen.
Steel and stone are stronger than wood BUT they are also heavier so their supports must be able to support a greater load. A stronger beam material does not necessarily mean a better support. (Form follows function) (see notes for I and H beams)
If corrugated, it will also strengthen a beam. - 14Beam-A level structure designed to support a load (horizontal)
- 15ex of beamsa log across a stream, floor, door frame, top of table, platform of chair, shelves, bottom of bag, window sils, window frames, ceiling.
- 16Beam-A level structure designed to support a load (horizontal)
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- Fichas sobre science (chapter 11 test), creado por lilybloom3 el 26/10/2014.
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