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Flashcards in Metal Nonferrious Deck (31)
1

Nonferrous Metals

metals w/o iron

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Nonferrous Metals used most commonly in construction:

aluminium, copper, copper alloys (bronze, brass)

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Aluminum advantage:

excellent strength to weight ratio

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Aluminum disadvantage:

high energy req’d for refining/manufacturing

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primary source of aluminium

bauxite

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aluminum soft and weak,
improved in alloy w :

manganese, zinc, magnesium, copper.

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Copper + Copper Alloys advantage:

corrosion resistance,
workability,
high elec conductivity.

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copper alloy: +tin

bronze

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copper alloy: +zinc

brass

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copper described by these associations:

Copper Development Association (CDA)
Unified Numbering System (UNS)

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on copper, clear organic coatings can prevent:

patina

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Monel:

trade name, roofing. copper+nickel.

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Zinc advantage:

resistant to corrosion

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Zinc often used for:

sheet roofing/flashing.
commonly for coating = galvanized steel.

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Lead advantage:

resistant to corrosion

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Lead occasionally cover complex roof shapes bc

easy to form.

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terneplate:

alloy 75% lead/25% tin,
to plate steel for roofing.

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lead density = ideal for

acoustic insulation/
vibration control/
radiation shielding.

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Structural Metals include

steel + aluminum

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H-shaped, for beams/columns.

wide-flange members:

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designated W,
followed by nominal depth (in.),
and weight (lb/ft).
ex. W18x85 (18” deep, 85 lb/ft),
actual depth less than nominal depth.

wide-flange sections:

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narrow flange,
inside faces of flange have slope of 1:6.
unlike W, actual depth is nominal depth.
designated S
ex. S18x85.
beams only.

American Standards I-beams:

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American Standards I-beams inside face of flange have slope of

1:6

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flange on one side only.
designated C.
typ. use:
frame openings,
form stair stringers,
anywhere where flush side is req’d.
not used alone for beams/columns. (buckle)

American Standard channel:

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made by cutting W/S in half.
designated WT/ST.
used for cords of steel trusses.

structural tees:

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in equal/unequal lengths.
designated L,
followed by length of angles,
AND thickness of legs.
used in pairs as members for trusses,
or singly as lintels,
misc bracing of other structural members.

steel angles:

27

light columns,
members large trusses/space framing.

square/rec tube,
and round pipe members:

28

available many wall thicknesses

structural tubing:

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standard weight, extra strong, double-extra strong. measured in nominal dims, actual a little larger.
square/rec tubing measured in actual.

structural pipe:

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any rectangular section,
≤8” width and ≥0.203in thickness,
or sections 6-8” width and ≥0.230in thickness.

bar:

31

any section over 8” width, w thickness ≥0.230in,
or sections ≥48” width, and ≥0.180in thickness.

plate: