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Flashcards in Chapter 2- Concepts of Construction Deck (143)
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31

Very long, thin columns are known as __ __ columns.

Euler's Law

32

The terms panel walls and curtain walls are often used interchangeably to describe non load bearing enclosing walls on framed buildings. Technically, __ walls are one story in height and __ walls are more than one story.

Panel, Curtain.

33

The __ combines the function of the beam and the column.

Arch

34

The truss is a beam, and its thrust is straight down the wall or column. In contrast, the thrust of an arch is __.

Outward

35

When the arch is tied, the thrust is __, but it lacks the triangles that would make it a truss.

Downward

36

The __ is a shell. It can be considered a three dimensional arch.

Dome

37

__ domes are formed from a large number of triangles of equal size.

Geodesic

38

There are two general types of connections:

A building is said to be __ when the elements are connected by simple connectors such as bolts, rivets, or welded joints. These are usually not strong enough to reroute forces if a member is removed, so do not assume loads will be redistributed around the missing member.

Pinned

39

In a __ __ building, the connections are strong enough to reroute forces if a member is removed.

Rigid Framed

40

A __ concrete building is rigid framed.

Monolithic

41

__ concrete buildings may be pinned or may be made monolithic by the use of wet joints in which cast in place concrete unites rods that project from precast sections.

Precast

42

Steel heated to 1,000 degrees F elongates __ inches per 100 feet.

9.5

43

Unprotected steel rods and cables ( which fail at __ degrees F) are often used to tie failing buildings together or to provide some additional resistance to earthquake movement.

800

44

Vertical or horizontal orientation.

Attitude

45

A load that passes through the centroid of a section under construction and is perpendicular to the plane of the section.

Axial Load

46

Lightweight steel truss joist.

Bar Joist

47

A structural member that transmits forces perpendicular to such forces to the reaction points.

Beam

48

A line of columns in any direction.

Bent

49

A structural system that uses diagonal members to provide bracing against lateral wind and earthquake loads.

Braced Frame

50

Diagonal member that supports what would otherwise be a cantilever.

Bracket

51

Consists of an exterior wythe of brick directly mortared or parked to an inner wythe of concrete masonry unit.

Brick and Block Composite Wall

52

The quantity of heat required to raise the temperature of 1 pound of water 1 degree F at the pressure of 1 atmosphere and temperature of 60 degrees F.

British Thermal Unit, BTU.

53

Made of steel plates and angles riveted together, as distinguished from one rolled from one piece of steel.

Built up Girder

54

Mass of masonry built against a wall to strengthen it. Necessary when a vault or an arch places a heavy load or thrust on one part of a wall.

Buttress

55

Measured in Btu; the amount of heat required to raise 1 pound of water 1 degree F.

Caloric value

56

Upward rise.

Camber

57

A beam supported at one end only, rigidly held in position at the end.

Cantilever beam

58

A wall built of two wythes separated by a space for rain drainage or insulation.

Cavity or hollow wall

59

The center point at which a body would be stable, or balance, under the influence of gravity.

Centroid

60

The outside members (top and bottom) of a truss, as opposed to the inner webbed members

Chord