Floors Flashcards
What is dead load?
Refers to the permanent self-weight of a building.
What is live load?
Refers to the moveable changing loads in a building(people, furniture).
A bearing partition perpendicular to joists shall not be offset more than _______ from a supporting girder, wall or partition.
the depth of the joist
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?
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.
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 ________.
1 1/2”
3”
joist hangers
Alternatively, the ends of joists shall be supported on a _______ ribbon strip and shall be ______ to the adjacent stud.
1x4
nailed
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.
2”
48
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.
3”
three
Joists shall be supported at the ends by full depth _____ not less than _____.
solid blocking
2”
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.
2”
12”
solid blocking
diagonal bridging
1x3
8’
Notches in solid lumber joists, rafters and beams shall not exceed ______ of the depth of the member.
1/6
Notches in solid lumber joists, rafters and beams shall not be longer than ______ of the depth of the member.
1/3
Notches in solid lumber joists, rafters and beams shall not be located in the middle _____ of the span.
one-third
Notches in solid lumber joists, rafters and beams at the ends of the members shall not exceed _______ the depth of the member.
one-fourth
The tension side of members ____ or greater in nominal thickness shall notched except at the _____ of the members.
4”
ends
The diameter of holes bored or cut into solid lumber joists, rafters and beams shall not exceed _____ the depth of the member.
one-third
Drilled or cut holes in solid lumber joists, rafters and beams shall not be closer than _____ to the _____ or ____ of the member.
2”
top
bottom
Where solid joists, rafters and beams are notched, holes shall not be drilled or cut closer than _____ to the notch.
2”
Openings in floor framing shall be framed with ________ and ______ joists.
header
trimmer
Where the header joist span exceeds ____, the trimmer joists and the header joist shall be _____.
4’
doubled
Particle board floor underlayment shall conform to Type _____ and shall be not less than _____ in thickness.
PBU
1/4”
Concrete slab-on-grade floors shall be a minimum ______ thick.
3 1/2”
The fill under concrete floors shall not exceed depths of _____ for clean sand or gravel and ____ for earth.
24”
8”
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.
4”
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.
6
6”
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.
center
upper one-third
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 ________.
200
noncombustible
Plastic composite deck boards, stair treads, guards, and handrails containing biodegradable materials shall be ______ and _____ resistant.
decay
termite
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.
12”
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.
one-fourth
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.
1 1/2”
3”
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.
60
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.
3
3
Wood decking shall be attached to each supporting member with not less than ____ 8d threaded nails or ___ No. 8 wood screws.
2
2
Fasteners used in deck ledger connections shall be _______ or ________.
hot-dipped galvanized
stainless steel
