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Sub floor frame: T-section bearer and
inline joists
Single span joists are set between and are supported off a T
section bearer. This produces a shallower floor than
conventional bearer and joist arrangements.
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Sub floor frame: Joists on bearer
The conventional arrangement in sub floor frames
is for joists to run over the top of bearers. Joists and
bearers are regularly used as continuous span elements
running the full length or width of the building.
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Sub floor frame: Inline joists fixed
to bearer with joist hangers.
Single span joist are set between the bearers and
supported with proprietary sheet metal beam hangers. This
produces a shallower floor than conventional bearer and
joist arrangements.
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Brick veneer cladding: brickwork on
strip footings and floor supported on engaged piers.
A traditional form of construction with a brick
wall carried up off a strip footing. Engaged piers on the
inside face support the floor. This method is being replaced
due to the cost and delay involved in having several trades
involved one after another.
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Sub floor support: Brick pier on pad
footing
This is the traditional method of sub-floor
support where a brick pier on a pad footing supports the
bearer. This method is being replaced due to the cost and
delay of having several trades involved.
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Sub floor support: Timber or concrete
post on pad footing
A timber or concrete post can be cast into or
fixed to a pad footing to support the bearers. This method
is traditionally used in northern states of Australia.
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Sub floor support: Driven timber pile
Timber, steel or concrete piles can be driven or
screwed into poor soils to provide adequate foundation. The
piles are usually driven or screwed to refusal.
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Brick veneer cladding: steel post and
proprietary lintel supporting brickwork.
The timber sub-floor can be built on steel posts
that support proprietary lintels. These galvanized steel
lintels then support the brickwork. Strip footings are
unnecessary.
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Brick veneer cladding: Floor supported
on posts, piles or piers with brickwork on strip footing.
The timber sub-floor can be built on posts, piles
or piers independent of the external brickwork. Masonry
trades then only have to come to the site once; to build the
external brickwork skin off the strip footing after the rest
of the building is weatherproof.
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Sheet or weatherboard cladding: wall
frames supported off joist on posts, piles or piers.
The timber sub-floor can be built on posts, piles
or piers and the external wall clad in plywood or other
forms of timber cladding.
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Sub floor frame: Inline joist
supported off bearer with ledgers
Single span joists are set between the bearers
and supported on a ledger nailed along the sides of the
bearer. This allows joists to be installed quickly and
produces a shallower floor than conventional bearer and
joist arrangements.
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Sub floor support: Steel post on pad
footing
A steel post can be cast into a pad footing to
support the bearers. This can be part of a proprietary
system that includes caps and brackets that fix to both the
post and the bearer.
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Upper floor level joist & flooring
systems
Sawn timber and a range of engineered timber
products, such as nail plated or glue laminated elements,
are used as joists in upper floor structures. Engineered
products can be used over continuous spans while sawn timber
is regularly used for single spans
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Insulated floor: batts on mesh
Timber floors need to be insulated in cold
climates. Tight fitting insulation batts can be installed
between the floor joists during construction. They are
supported by wire mesh or by moisture permeable membrane.
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Insulated floor: batts on mesh
Tight fitting insulation batts can be installed
between the floor joists after construction. They are
supported by wire mesh or moisture permeable membrane fixed
to the undersides of the joists.
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Insulated floor: batts on ceiling
Tight fitting insulation batts can be installed
between the floor joists after construction. They can be
supported on the ceiling of the room below.
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Insulated floor: draped foil
A moisture permeable membrane is draped over the
joists under the flooring and the joints are taped. This
establishes a stable air barrier under the flooring that
insulates the floor. The membrane also eliminates drafts
through any gaps in the boards.
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Insulated floor: folded foil batts
Folded foil batts can be installed before or
after construction of the floor. The batts are stapled to
each joist and span between the bearers. Joints are taped.
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