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Carpentry Level 2 BC 2023 > H4 - Plan Wall Systems - LT #2 > Flashcards

H4 - Plan Wall Systems - LT #2 Flashcards

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1
Q

List four factors that will affect the design of exterior wall studs.

A

1) Structural requirements
2) Finish material
3) Wall sheathing type
4) Thermal insulation requirements

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2
Q

Why is it not a good idea to leave concealed spaces in the wall frame?

A

Because insulation s required before installation of sheathing

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3
Q

What are the two purposes of an L-Shaped Corner stud?

A

Provide backing for wall finishes, & a nailing base for intersecting walls.

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4
Q

What is meant by the nominal size of a door or window

A

Nominal is the listed size rather than the actual size. For doors, it’s the size of the door & does not include the door jamb.

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5
Q

What is a rough opening for a 30 x 68 in-swing exterior door?

A

38 1/4 x 71 1/2 (Check chart)

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6
Q

What is the minimum end-bearing for a lintel that spans 12 feet

A

3”

For 3 m or less it’s 1.5”
For 3 m or more it’s 3”

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7
Q

What does the abbreviation PET stand for?

A

Precision End Trmmer Stud

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8
Q

What is the minimum size of stud required for an interior wall that supports one floor?

A

2 x 4

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9
Q

List three installations that backing facilitates

A

1) Finishes
2) Fixtures
3) Equipment

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10
Q

Over what height of wall are fire stops required?

A

10 feet

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11
Q

What is the main consideration when renovating interior partition walls?

A

Determine if the wall is load-bearing.

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12
Q

The three greatest safety concerns when building walls are:

A

1) Air nailing
2) Lifting
3) walling accidentally falling

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13
Q

Lifting walls in steps can be done by:

A

Using blocks & sawhorses. Allowing a resting point

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14
Q

Once walls are erected, when must they be braced?

A

Immediately

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15
Q

Who is it up to in determining that the information meets the current building code requirements?

A

The carpenter

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16
Q

Before choosing the size & spacing of studs, consideration must first be given to:

A

The structural requirements, finish materials & type of wall sheathing & thermal insulation requirements

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17
Q

The two criteria used in determining the minimum size & spacing of studs are:

A

The stud’s unsupported height & the load it will carry.

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18
Q

When is 12” OC used?

A

When 2x4 exterior studs support 2 floor loads, or 2x6 studs support three floor loads.

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19
Q

What advantages of 16” oc?

A

Gives better support to drywall & exterior finishes, and allows for more attachment points for cabinets. Thinner sheathing which reduces costs.

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20
Q

What advantages of 24” oc?

A

Uses less lumber, is quicker to frame & provides a better overall r-value for the wall, helping to meet the heat loss requirements of BC building code.

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21
Q

Why must concealed wall stud spaces be avoided?

A

So that the full wall can be insulated once the building is weathertight.

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22
Q

What is used to provide solid attachment of the interior wall and provide backing & attachment points for the interior finish?

A

Partition studs

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23
Q

For a 2x4 interior, a _____ is nailed to a regular wall stud.

A

A 2 by 6 (go 2 inches bigger )

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24
Q

What is a partition wall alternative?

A

Building ladder blocking with 2x4 at 24” oc

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25
Q

The rough opening is larger than the actual size of the window/door to allow for:

A

Shimming, or to level & plumb

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26
Q

Exterior doors are usually hung using a ____ rabbeted jamb

A

1 1/4” to 1 1/2” to allow for a thicker jamb

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27
Q

The clearance between a door and door jamb is usually

A

1/8 to 1/4”, allowing a clearance of 1/16th to 1/4 at each side of the door

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28
Q

How much space is adequate for shimming each side of a door jamb?

A

1/4”

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29
Q

If the rough framing is plumb, can the hinge side of the door jamb be fastened directly to the cripple stud without shims?

A

Yes, this will leave 1/2” for shimming on the latch side

30
Q

Does shimming take place at the top of a door jamb?

A

No, but the bottom may have to be shimmed level

31
Q

If a door swings out, the threshold design takes up _____ than one for an “in swing” door

A

Less room

32
Q

Thick edge of a doorsill is usually 1 1/2” thick, how much allowance is made for the door sweep?

A

1/2” to 3/4”

33
Q

The area above doors & windows is known as the

A

“header space”

34
Q

The beam above openings is called:

A

“Lintel”

35
Q

The depth of a lintel needed for a specific opening depends upon:

A

the width of the opening & the load supported by the lintel

36
Q

Lintel spans are listed in the building code, but uniform loads must be sized by:

A

A registered engineer

37
Q

What do engineers often use point-loaded lintels and lintels that carry very heavy loads or have long spans?

A

LVLS

38
Q

2 x 10 lintels are commonly used, but what is their disadvantage?

A

Less room for insulation & contributes to shrinkage problems

39
Q

Lintels within 2x6 walls can either be 2 ply or

A

3 ply

40
Q

What can be nailed to the underside of the lintel to support the interior finish?

A

a 2x6 or a furring strip can be added to the bottom.

41
Q

When a 3ply 2x10 is too small for combination load & span, what may be needed?

A

2 x 12s

42
Q

If the extra height is needed, one or both top plates can be eliminated if:

A

A single or both top plates can be eliminated if a continuous single top plate or metal strap is used as a tie across the top.

43
Q

Windows are often “on-size” meaning:

A

That the opening is framed to the window’s nominal size & the heel size of the window is slightly less to allow for shimming

44
Q

Walls angled on the top are known as:

A

Raked walls

45
Q

The ceiling height is designed to use two full widths of gypsum wallboard as the wall finish. Two full widths measure 8 ft, and an extra 3/4” is added to allow for:

A

The ceiling board & leave a small gap at the bottom to the sheets to be installed easily

46
Q

What is a PET?

A

Precision End Trimmer stud
come in 8,9,10 foot nominal ceiling heights.

Used with a single bottom plate and are 1 1/2” thick

47
Q

Define Sheathing for exterior walls

A

Exterior wall sheathing provides support for the exterior finish & acts as a structural bracing

48
Q

When is sheathing not required?

A

If wall finish doesn’t require, etc. let-in braces, metal straps or a suitable interior finish are all that’s needed.

49
Q

Describe lumber sheathing:

A

Made with rabbets, this is referred to as shiplap, Lumber sheathing is usually made from 2x8 or 2x10 boards resawn to 3/4 thickness

50
Q

Lumber is sheathing after the walls are stood & braced, why?

A

Due to the weight of the wall, it would be too heavy to lift

51
Q

Lumber sheathing is applied at 45 degrees to the plate line, unless

A

Diagonal bracing is provided within the wall.

52
Q

Lumber sheathing has what advantages?

A

1) If applied after the walls are erected, they can be installed in continuous boards from the foundation over the floor levels to the roof level.
2) Lumber sheathing usually shrink a sig. amount this leaves 1/4 to 1/2 gaps providing excellent venting for the wall cavity.

53
Q

Panel sheaths are staggered row to row, this is known as:

A

Breaking the joints.

54
Q

If sheathing is acting as the exterior finish, the panels may be installed:

A

Their long dimensions vertical

55
Q

How do interior walls differ from exterior walls?

A

Wall thickness can be a design, and load bearing can be easily reduced to minimum thickness for max. floor space

56
Q

What is the order of stud layout for interior walls?

A

1) Mark openings
2) Mark the corners
3) Mark the intersections

57
Q

What is a RO for a door?

A

RO = door with + 2 1/4

58
Q

BC Code requires a ___ “ clearance under doors for ventilation purposes.

A

1/2”

59
Q

The frame of a pocket door is installed during:

A

The framing of a building

60
Q

The rough opening of a pocket door is ___ “ wider than twice the door width.

A

2” wider than twice the door width

61
Q

The rough opening of a bi-fold door is 1 1/2” wider than the door size on the width to accommodate:

A

1/2” drywall on each side plus 1/4” for beading & mudding of drywall.

62
Q

Stair handrails require backing every ___ “ with the top backing approximately ___ “ above the line of nosing

A

Backing every 48” with the top of the backing approximately 36” above the line of nosing1

63
Q

What is a standard shelf height?

A

5’ 8”

64
Q

Who often installs the backing for plumbing and electrical fixtures?

A

The plumbing & electrical contractors are often doing it

65
Q

Toilet & Tub assist bars require very strong support: Use

A

2 x 8 blocks, minimum and hold them with 3x 31/4 “ nails at each end.

66
Q

How to add blocking for drapery rods?

A

Add blocks of 2x10 at each side of the window opening and include backing above the upper rough sill at 48” o.c wider than 4 ft

67
Q

Wood members that extend from an inside finish to the outside finish of insulated walls create a _________, this gives heat a way of escaping from inside of the building.

A

Thermal bridge

68
Q

When are fire stops required?

A

If the wall is more than 10 ft. in height or if there are open spaces for the fire to enter floors or ceilings.

69
Q

Renovations are done to interior walls, it must first be determined if ______

A

The wall is load bearing or not

70
Q

When toenailing wall studs in place, what is the minimum length of nail that may be used?

A

4x 63 mm nails

71
Q

What is the minimum length of nail that may be used to fasten the cripple studs to the adjacent studs?

A

76 mm @ 750 o.c (3” nails at 30”)

Carpentry Level 2 BC 2023 (50 decks)

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