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”
