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E Tech I: Steel Test
n/a
45
Architecture
Undergraduate 3
06/27/2011

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Term
Standard Structural Steel
Definition
0.2-0.5% carbon content; rolled into standard sections and required fire protection
Term
Alloy Steel
Definition
12-27% (stainless steel); alloying elements are added to achieve special properties
Term
Weathering Steel
Definition
contains up to 0.05% copper; develops a protective oxide coating (patina) when exposed to weather and needs no finish (Cor-Ten)
Term
CARBON
Definition
increases strength and hardness of steel; reduces ductility and welding capabilities
Term
Steel Ductility
Definition
property that allows steel to withstand excessive deformations caused by high stresses
Term
Galvanic Action
Definition
corrosion resulting from the contact of dissimilar metals in the presence of an electrolyte
Term
how to prevent Galvanic Action
Definition
different metals should be separated from each other by a non-conductive barrier (rubber, neoprene)
Term
Ferrous metals
Definition
metals containing a substantial proportion of iron (stainless steel, galvanized iron)
Term
Non-ferrous metals
Definition
all other metals that do not contain iron such as aluminum, copper, zinc; resist corrosion
Term
Method of Metal Fabrication: CAST
Definition
molten metal is poured into sand molds or forms where it is cooled and hardened; used when desired shape or size is not easily obtained by rolling or machining
Term
Method of Metal Fabrication: WROUGHT
Definition
solid metal is forcibly shaped into desired profile; rolling, extruding, drawing
Term
Rolling metal
Definition
metal is passed through rollers
Term
Extruding metal
Definition
a ram forces preheated metal through a die of the desired profile
Term
Drawing metal
Definition
metal is pulled through a die; used to make complex shapes from hot-rolled bars
Term
Light Gauge Framing
Definition
aluminum framing system that is lightweight, fast to erect, incombustible, decay/rot/termite-proof, dimensionally stable, easy passage of pipes, wiring, etc; installed like a wood stud system and can span to 32 feet high with light loads
Term
Steel Decking
Definition
corrugated, ribbed, or cellular steel used as a working platform during construction and as a formwork for pouring concrete
Term
deformation in the decking
Definition
locks the concrete slab and decking together to achieve composite action (provides tensile strength)
Term
Column Splice
Definition
typically bevel-welded
Term
bolted connections
Definition
done in the field or construction site
Term
welded connections
Definition
done in the shop prior to delivery
Term
moment connections
Definition
welded
Term
shear connecitons
Definition
bolted
Term
why steel beams do not align
Definition
because of the height of the open-web joist (bearing plate)
Term
K-series open web joists
Definition
span up to 60'--depth ranges from 8" to 30"
Term
LH-series (longspan) open web joists
Definition
span up to 96'--depth ranges from 18" to 48"
Term
DLH-series (deep longspan) open web joists
Definition
span up to 144'--depth ranges from 52" to 72"
Term
spacing between open web joists
Definition
2' to 10'
Term
open web joists
Definition
small lightweight trusses; standardized; shop-fabricated; strong in vertical direction; weak in flat, horizontal direction
Term
"X" bridging
Definition
used on the end bays
Term
horizontal bridgin
Definition
used in the middle bays
Term
Bridging
Definition
distributes loads across framing system and resists overturning of joist
Term
lateral bracing
Definition
diagonal bracing, moment bracing, shear bracing: three building stabilization methods against lateral forces of wind and earthquakes
Term
eccentric bracing
Definition
absorbs energy during an earthquake to protect the building from collapsing; used in earthquake prone regions
Term
hot rolling
Definition
method used to shape a structural tee
Term
cold forming
Definition
method used to shape a typical steel door frame
Term
extrusion
Definition
method used to shape a typical aluminum storefront section
Term
Crystal Palace
Definition
first cast iron and glass building; 1851; Joseph Paxton; London, England
Term
Eiffel Tower
Definition
first wrought iron building; 1887-1889; Paris, FranceGustave Eiffel; prefab steel structure
Term
Home Insurance Company
Definition
first steel building; 1893; Chicago, IllinoisWilliam LeBaron Jenney
Term
primary metals of construction
Definition
aluminum (weather resistance), copper (plumbing systems), steel (strengths)
Term
three terms used for structural hierarchy
Definition
primary (beams, columns), secondary (joists), tertiary (decking)
Term
steel ingredients
Definition
iron (98%), carbon (controls hardness), copper (resistance to weathering), chromium (for stainless steel)
Term
hot rolling
Definition
eliminates flaws and is used to make structural shapes such as wide-flange beams and channels
Term
Cold rolling
Definition
increases strength but decreases ductility
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