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2 - Framed Structures And Building Science > 020202b Wall And Partition Framing > Flashcards

020202b Wall And Partition Framing Flashcards

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1
Q

What factors are used to determine the minimum allowable stud size for a building?

A

Whether the wall is exterior or interior
Supported loads
Stud spacing
Unsupported height

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2
Q

What is the purpose of trimmers or jack studs?

A

They are nailed to a regular stud and, as a unit, they are vertical structural members that transfer the load from the lintel to the floor system below.

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3
Q

What is the minimum end bearing for a lintel?

A

1-1/2” (38mm)

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4
Q

Where are cripple studs placed in a wall frame?

A

Below or above openings in walls.

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5
Q

What is commonly used to provide anchorage and backing where two walls intersect?

A

L-posts are used at wall intersections.

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6
Q

The blueprints show a section view of a conventionally framed wall. The ceiling height is specified as 97’-1/8”. What length of stud is needed.

A

97-1/8 minus 4-1/2 (three plates) = 92 5/8

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7
Q

If there are irregularities in the floor frame, how far may the wall plates overhang the floor?

A

One third (1/3) the WIDTH of the plate.

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8
Q

Why is it desirable to have the wall studs occur directly over the floor joists?

A

This provides better load transfer and minimizes problems with plumbing and ductwork.

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9
Q

Why are door and window rough openings larger than the finished unit size?

A

This allows for insulation and levelling of the window or door.

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10
Q

What is the first step in laying out a rough opening.

A

Start by marking the centreline of the rough opening on the plates.

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11
Q

A window rough opening is 712 ,, wide. What is the cutting length of the lintel?

A

788 mm

Lintel span plus thickness of two trimmers.

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12
Q

What determines the length of a trimmer?

A

The vertical height from the sole plate to the underside of the lintel.

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13
Q

What determines the length of a rough sill?

A

The length of the rough sill is the same as the width of the window rough opening.

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14
Q

What are two alternatives to using an L-Post where a partition intersects an external wall?

A

U-shaped post

Partition ladder

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15
Q

If the wall studs are laid out at 16” centres what is the measurement to the edge of the first stud?

A

15-1/4”

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16
Q

When laying out regular studs, what must be done where a rough opening occurs?

A

The layout marks change from X to C.

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17
Q

According to the NBC, what length and quantity of nails are needed to end nail wall plates and studs together?

A

Two 82 mm (3-1/4”) long nails are required at each end of the stud.

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18
Q

When assembling the wall frame, what is done to the studs prior to placing them on the layout marks?

A

Site down the edge of the stud to determine which way it is crowned. Place all the studs with crowned edge up.

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19
Q

What is usually done with cap plates at corners and partition intersections?

A

Cap plates are lapped at corners and partition intersections.

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20
Q

Once the wall frame is assembled, what must be done done before sheathing is applied?

A

Position the wall so that the sole plate is aligned to the chalk line marked on the subfloor. Tack the sole plate to the subfloor to the wall straight. Move the top of the wall back and forth until both diagonal measurements are identical. When this occurs, the wall is square. Take the cap plate down to keep the wall from moving.

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21
Q

How is sheathing started if a long side wall is framed first?

A

Flush with the end of wall

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22
Q

On short side walls, the sheathing should project past the framing by how much?

A

The sheathing will project pass the framing by the thickness of the side wall.

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23
Q

What is the nailing pattern for applying wall sheathing?

A

Using nails (min. 51 mm or 2”) or staples (min. 38 mm or 1-1/2”) placed at least 150 mm (6”) o.c along edges and every 300 mm (12”) oc along intermediate supports.

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24
Q

After an exterior wall is erected, what is done to the sole plate?

A

Starting at one end, position the sole plate on the chalk line, straighten the wall plate by aligning it to the chalk line and nail the plate to the floor frame.

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25
Q

What are some distinguishing features of a rake wall?

A

A rake wall has a sloping top plate and studs that are cut on an angle at their top.

26
Q

When building interior walls, what problem may result if all the short partitions are erected first?

A

If all the short partitions are erected first, there may be no space left to assemble the long walls.

27
Q

What is a non-loadbearing partition?

A

This type of wall supports no load other than its own.

28
Q

If a non-loadbearing wall runs parallel to the floor joists, how must it be supported?

A

They must occur directly on a joist, or be supported by blocking between the joists.

29
Q

If the partitions have an insulated ceiling above them what must be placed between the top and cap plates during assembly?

A

A 400 mm (16”) strip of polyethylene vapour barrier.

30
Q

What method is used to straighten the top of a wall?

A

String line and feeler blocks are used to straighten the top of a wall.

31
Q

What is the best way to secure the bottoms of wall braces?

A

Nail the bottom of the braces to a block that has been attached to the floor joists.

32
Q

If a stud in a load bearing wall must be notched, how much solid lumber must be left?

A

2/3 the width of the stud

33
Q

Why would a plumbing wall be constructed with 2x6 studs rather than 2x4 studs?

A

A wider wall is needed to accommodate plumbing drains and vent stacks.

34
Q

What may be used to provide anchorage for a stair handrail?

A

Backing or blocking may be placed inside the wall.

35
Q

Describe a GIRTH.

A

A girth is blocking installed between the studs to stiffen the wall.

36
Q

When framing walls, what consideration must be made for application of drywall?

A

Adequate backing.

37
Q

Why is a 400 mm (16”) strip of polyethylene placed between the top and cap plates and the exterior wall and partitions?

A

This allows for a continuous vapour barrier.

38
Q

Trimmer studs support the lintels in load bearing walls. T or F

A

T

39
Q

Lintels require at least __ mm of bearing at each end. So the minimum thickness of a trimmer stud must also be __ mm.

A

38 mm (1-1/2”)

40
Q

Lintels that support heavy loads, such as roof beams, require additional bearing. T or F

A

T

41
Q

Trimmer studs must be nailed to a full length stud on each side of a rough opening. T or F

A

T

42
Q

Are trimmer studs continuous from the sole plate to the underside of the lintel.

A

Yes

43
Q

Install the lintel with the nails visible from the inside of the building. Why?

A

So the inspector can easily determine that they are fastened together.

44
Q

What is the name of the wall member that is placed on top of the studs?

A

top plate

45
Q

The vertical stud which supports the lintel in a rough opening is called a:

A

Trimmer stud

46
Q

Which of the following is a definition of a trimmer (jack) stud?

A

extends from sole plate to lintel

47
Q

Trimmer (jack) studs are framed between the bottom plate and what other framing member?

A

Lintel

48
Q

For non-bearing interior or exterior walls, the lintel framed over an opening can be placed on flat. T or F

A

T

49
Q

In order to use rigid insulation in place of sheathing what must be used?

A

The walls must have let-in metal t bracing and flat metal x bracing to add rigidity. If you are NOT using a wall finish on the inside then you must install a 1x4 let in bracing to provide permanent support.

50
Q

What is the minimum length of nails in mm for joining wood or metal strapping to underside of floor joists?

A

57 mm

51
Q

Rough opening sizes for bifold and bypass doors are determined by the type of jamb finish used. T or F

A

T

52
Q

The rough opening for a bifold door using a half jamb would be…

A

Door width + 2 drywall thickness + 6 mm

Door height + drywall thickness + 19 mm

53
Q

The rough opening for a pocket door would be»>

A

2 x door width + 25 mm

Door height + 100 mm

54
Q

Non-loadbearing walls running parallel to floor joists must occur directly on a joist or be supported by blocking at least ___ mm on centre

A

1.2

55
Q

If a load bearing wall is parallel to the floor joist what must it be supported by?

A

a beam or bearing wall directly underneath.

56
Q

Load bearing walls that carry only framed ceiling loads and are 90 degrees to the joists must be no more than ___ mm from support (such as beam or bearing wall beneath)

A

900 mm (3’)

57
Q

Load bearing walls that carry floor loads myst be no further than ___ from support.

A

600 mm (2’)

58
Q

If partitions are to have an insulated ceiling above them a ___ mm strip of polyethylene vapour barrie is sandwiched between the TOP and BOTTOM plate during assembly.

A

400 mm 16”

59
Q

Before standing the partitions in place, to maintain the continuity of the vapour barrier, a __ mm wide strip of poly must be stapled vertically to the exterior walls where a partition intersects.

A

400 mm

60
Q

When notching a non-loadbearing stud, 40 mm of untouched material must remain. T or F

A

T

61
Q

What is a chimney chase?

A

A framed enclosure surrounding a chimney pipe.

2 - Framed Structures And Building Science (4 decks)

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