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BDCS Flashcards

0
Q

What is heat-strengthened glass and how is it often used

A

Plate glass that is made opaque by a ceramic glaze that is fused over the surface. Used exclusively for spandrel glazing I’m curtain walls

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1
Q

Explain the finishing of metals exposed to weather

A

Alkyd based paint preferred over oil based. Paint should be of the same base type. Coal-tar enamel used if under ground or water

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2
Q

Name the 4 basic types of cement and their common use

A

Type I - normal
Type II - moderate sulfate resist, SOG
Type III - high early strength(high heat), cold weather
type IV- low heat, large pours & hot weather
Type V- sulfate resisting.

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3
Q

Bulb tee

A

Used in gypsum conc deck construction. Connected to main structure. Upside down “T”. Planks rest on flange. Gap from edge of plank to tee web is filled with gypsum grout.

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4
Q

What are the three grades of glulam construction

A

Premium
Architectural
Industrial

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5
Q

What is the purpose of strip panel coatings on aluminum frame windows?

A

Minimize corrosive damage caused by alkalis found in wet concrete mortar and plaster

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6
Q

Gypsum partition tiles and blocks are held together with this

A

Gypsum mortar

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7
Q

The apartment building on the rue Franklin in Paris designed by Auguste Perret is known as the first to do what?

A

Employ the use of reinforced concrete framing

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8
Q

Blisters in built up roof decking are caused by what.

A

The formulation and concentration of moisture and or air anywhere within the build up assembly

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9
Q

Concrete having a low water cement ratio is what?

A

Stronger and more resistant to freezing and thawing

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10
Q

How does excessive bleeding affect concrete

A

Weakens the surface of concrete

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11
Q

Class A Door: Location, hours

A

3 hour, fire walls between buildings or building divisions. 100si max glass per leaf. Auto closing or self closing

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12
Q

Class B door

A

1.5 hour, stair wells. 100si max glass per leaf. Self closing

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13
Q

Class C door

A

45min, opening to corridor or in room partitions. 1296 si max glass per leaf. Self closing

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14
Q

Class D door

A

1.5 hour, exterior wall opening. No glass permitted. Self closing

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15
Q

Type v construction

A

Frame construction. Wood frame

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16
Q

Type III construction

A

Joisted masonry. Masonry walls, wood roof.

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17
Q

Type IV construction

A

Heavy timber

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18
Q

Type II construction

A

non-combustible. (Light gage metal studs)

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19
Q

Type IB construction

A

Fire resistive non-combustible. Mid rise office and group R.

20
Q

Type IA construction

A

Fire resistive non-combustible. High rise

21
Q

What is calcium chloride?

A

Accelerant add mixture

22
Q

What is the mathematical relationship between the U-factor (thermal conductance) and R-value (thermal resistance)?

A

The reciprocal of U is R therefore the thermal conductance (U) of one square foot of R-30 batt insulation is 0.03

23
Q

Ancient roman structure consisting of a 143 foot diameter some resting on a circular masonry wall

A

Pantheon

24
Q

Building of the Chicago school considered to be the first iron-and-steel-framed sky scraper

A

Home Insurance Building

25
Q

What is the main reason light gauge metal studs are used in place of wood?

A

A degree of fire resistance is required that is unobtainable with wood.

26
Q

A process where zinc dust is applied under great heat to metal to impart corrosion resistance

A

Sherardizing

27
Q

How does aluminum react when exposed to weather?

A

Thin film of oxide which causes the surface to become dull and chalky

28
Q

Copper and stainless steel do what at about the same rate?

A

Expand and contract

29
Q

Material used for flashing that is commonly painted to minimize corrosion

A

Galvanized sheet metal

30
Q

Process that employs an electric current and an Electrolux solution to deposit a metallic coating on steel is called

A

Electroplating

31
Q

In glulam beams better grade lumber is used where and why?

A

In the outer laminations because this is where the flexural stresses are higher

32
Q

The greatest drying shrinkage of lumber is in which direction?

A

Across the grain rather than parallel

33
Q

When should add mixtures be added to a batch?

A

Before or during mixing. Never after

34
Q

Glass block is always set in what pattern?

A

Stacked bond. Running bond creates pressure points. Blocks cannot be cut and a running bond requires the use of half pieces at the ends

35
Q

Damp proofing cannot resist…

A

Constant hydrostatic pressure

36
Q

In the design of metal gutters one must be concerned with what?

A

Roof pitch, roof area, cross sectional gutter area

37
Q

What is the main difference between the installation of wood shingle versus asphalt shingles

A

Wood shingles are installed over spaced strips while asphalt shingles must be installed over solid sheathing

38
Q

Damp proofing most often involves the application of _________, not the use of ___________, which are used in waterproofing.

A

Liquid coatings, membranes

39
Q

If terrazzo is installed over wood substrate how is the inherent movement of the structure mitigated

A

It is isolated from the wood by a membrane and sometimes a layer of sand

40
Q

Name the three main factors that have contributed to the economy of high rise construction

A

Advancements in the steel rolling process, high speed elevators, improved connection methods such as welding and high strength bolting

41
Q

How should one remedy trapped air or moisture bubbles in built up roofing

A

Puncture the bubble and resurface that specific area

42
Q

Typically structural costs amount to what percent of the total construction cost?

A

25%

43
Q

What does adding hydrated lime to mortar do to the mixture

A

increases workability and water retention

44
Q

what type of tree does soft wood come from

A

evergreen

45
Q

what type of tree does hard wood come from

A

deciduous

46
Q

What is the purpose of a cant strip

A

To allow the felt layers to be slightly bent instead of 90 degrees where breakage would likely occur

47
Q

What happens to concrete as the waster cement ratio increases

A

The strength decreases

48
Q

Where does the vapor barrier go?

A

On the warm or room side. Vapor barrier is different from water proofing. I’m california there would be no need for the vapor barrier generally

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