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2018 IRC > Floors > Flashcards

Floors Flashcards

1
Q

What is dead load?

A

Refers to the permanent self-weight of a building.

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2
Q

What is live load?

A

Refers to the moveable changing loads in a building(people, furniture).

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3
Q

A bearing partition perpendicular to joists shall not be offset more than _______ from a supporting girder, wall or partition.

A

the depth of the joist

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4
Q

What are the blocking requirements for a double joist that supports a partition that needs to be separated to allow passage of piping or vents?

A

It needs to have full depth blocking with lumber not less than 2 inches nominal in thickness and spaced not more than 4 feet on center.

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5
Q

The ends of each joist, beam or girder shall have not less than _____ of bearing on wood or metal, have not less than _____ of bearing on masonry or concrete or be supported by approved ________.

A

1 1/2”
3”
joist hangers

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6
Q

Alternatively, the ends of joists shall be supported on a _______ ribbon strip and shall be ______ to the adjacent stud.

A

1x4
nailed

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7
Q

The bearing on masonry or concrete shall be direct, or a sill plate of _______ minimum nominal thickness with a minimum nominal bearing area of _______ square inches shall be provided under the joist, beam or girder.

A

2”
48

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8
Q

Joist framing from opposite sides over a bearing support shall lap not less than _____ and shall be nailed together with a minimum _____ 10d face nails.

A

3”
three

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9
Q

Joists shall be supported at the ends by full depth _____ not less than _____.

A

solid blocking
2”

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10
Q

Joists exceeding a nominal ____ by ___ shall be supported latterly by ____________, ___________ or a continuous _____ strip nailed across the bottom of joists perpendicular to joists at intervals not exceeding ____ on center.

A

2”
12”
solid blocking
diagonal bridging
1x3
8’

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11
Q

Notches in solid lumber joists, rafters and beams shall not exceed ______ of the depth of the member.

A

1/6

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12
Q

Notches in solid lumber joists, rafters and beams shall not be longer than ______ of the depth of the member.

A

1/3

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13
Q

Notches in solid lumber joists, rafters and beams shall not be located in the middle _____ of the span.

A

one-third

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14
Q

Notches in solid lumber joists, rafters and beams at the ends of the members shall not exceed _______ the depth of the member.

A

one-fourth

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15
Q

The tension side of members ____ or greater in nominal thickness shall notched except at the _____ of the members.

A

4”
ends

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16
Q

The diameter of holes bored or cut into solid lumber joists, rafters and beams shall not exceed _____ the depth of the member.

A

one-third

17
Q

Drilled or cut holes in solid lumber joists, rafters and beams shall not be closer than _____ to the _____ or ____ of the member.

A

2”
top
bottom

18
Q

Where solid joists, rafters and beams are notched, holes shall not be drilled or cut closer than _____ to the notch.

A

2”

19
Q

Openings in floor framing shall be framed with ________ and ______ joists.

A

header
trimmer

20
Q

Where the header joist span exceeds ____, the trimmer joists and the header joist shall be _____.

A

4’
doubled

21
Q

Particle board floor underlayment shall conform to Type _____ and shall be not less than _____ in thickness.

A

PBU
1/4”

22
Q

Concrete slab-on-grade floors shall be a minimum ______ thick.

A

3 1/2”

23
Q

The fill under concrete floors shall not exceed depths of _____ for clean sand or gravel and ____ for earth.

A

24”
8”

24
Q

A ______ thick base course consisting of clean graded sand, gravel, crushed stone, crushed concrete or crushed blast-furnace slag passing a 2” sieve shall be placed on the prepared sub-grade where the slab is below grade.

A

4”

25
Q

A ____ mil polyethlene or approved vapor retarder with joints lapped not less than _____ shall be placed between the concrete floor slab and the bas course or prepared sub grade where a base course does not exist.

A

6
6”

26
Q

Where provided in slabs-on-grade, reinforcement shall be supported to remain in place from the _______ to ________ of the slab for the duration on the concrete placement.

A

center
upper one-third

27
Q

Plastic composite deck boards, stair treads, guards and handrails shall exhibit a flame spread index not exceeding ______ unless the plastic composites are determined to be ________.

A

200
noncombustible

28
Q

Plastic composite deck boards, stair treads, guards, and handrails containing biodegradable materials shall be ______ and _____ resistant.

A

decay
termite

29
Q

Where decks post bear on concrete footings, lateral restraint shall be provided by manufactured connectors or a minimum post embedment of ______ in surrounding soils or concrete piers.

A

12”

30
Q

Deck beams shall be permitted to cantilever at each end up to ______ of the allowable beam span or the maximum cantilever length specified in table R507.6, whichever is less.

A

one-fourth

31
Q

The ends of deck beams shall not have less than _____ of bearing on wood or metal and not less than ____ of bearing on concrete or masonry for the entire width of the beam.

A

1 1/2”
3”

32
Q

Where lateral restraint is provided by joist hangers or blocking between deck joists, their depth shall equal not less than _____ percent of the joist depth.

A

60

33
Q

Where lateral restraint for deck joist is provided by rim joists, they shall be secured to the end of each joist with not fewer than _____ 10d nails or ____ No 10x3-inch long wood screws.

A

3
3

34
Q

Wood decking shall be attached to each supporting member with not less than ____ 8d threaded nails or ___ No. 8 wood screws.

A

2
2

35
Q

Fasteners used in deck ledger connections shall be _______ or ________.

A

hot-dipped galvanized
stainless steel

36
Q
A

2018 IRC (5 decks)

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