Term
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What is the difference between iron and steel? What is the difference between wrought iron and cast iron?
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Definition
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iron – element steel – alloy made of iron
Steel is stronger than iron, better tension and compression
Iron has 2% less carbon
cast iron
iron with two high a carbon content to be classified as steel
wrought iron
a form of iron that is soft, tough, and fibrous in structure, containing about .1% carbon and 1-2% slag |
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Term
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By weight, what is the major raw material used in the making of cast iron?
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Definition
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Term
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How are steel structural shapes produced? How are the weights and thicknesses of a shape changed?
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Definition
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beam goes through rollers that squeeze steel into desired shape/size. Using a hot saw to cut length/shape
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Term
How does the work of the fabricator differ from that of the erector? |
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Definition
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fabricator delivers the construction site steel components which are ready to be assembled, the received steel are assembled by the erector.
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Term
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Explain the designation W21x68
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Definition
wide-flange 21 in depth and 68 pounds |
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Term
How can you tell a shear connection from a moment connection? What is the role of each? |
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Definition
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Shear connection – stops connection from sliding all directions. Resists the force to take it apart.
Moment Connection – if pin or single bolt cannot move up or down but can rotate. One cannot rotate without rotating another.
[image][image]Moment connections used for overall rigidity of the building. Create structural continuity between the members. The shear connection is only to resist shear force only
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Term
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Why might a beam be coped?
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Definition
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coped beam has no top flanges so the tops of the beams are level. Can be used roof decking, floor,
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Term
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What is the advantage of composite construction?
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Definition
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stiff, lightweight, steel beam and concrete acts as a single structural unit.
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Term
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Explain the advantages and disadvantages of a steel building structure with respect to fire. How can the disadvantages be overcome?
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Definition
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steel is resistance to fire but softens to heat. Steel is encased in concrete/plaster/brick which absorb the heat
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Term
List three different structural systems in steel that might be suitable for the roof of an athletic Fieldhouse.
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Definition
Castellated Beams (flame cutting the web of wide-flanged section along zig-zag path, then reassembling the beam by welding its two halves point to point, increasing depth without increasing weight)
Trusses (triangulated arrangements, deeper and lighter than improved beams)
Arches
Tensile structures cables
Fabric |
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