NZ756101A - Expansion joint - Google Patents
Expansion jointInfo
- Publication number
- NZ756101A NZ756101A NZ756101A NZ75610119A NZ756101A NZ 756101 A NZ756101 A NZ 756101A NZ 756101 A NZ756101 A NZ 756101A NZ 75610119 A NZ75610119 A NZ 75610119A NZ 756101 A NZ756101 A NZ 756101A
- Authority
- NZ
- New Zealand
- Prior art keywords
- gap
- panels
- barrier strip
- barrier
- body section
- Prior art date
Links
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- 238000007789 sealing Methods 0.000 claims abstract description 20
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- UPMLOUAZCHDJJD-UHFFFAOYSA-N Diphenylmethane p,p'-diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 3
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- LNWBFIVSTXCJJG-UHFFFAOYSA-N [diisocyanato(phenyl)methyl]benzene Chemical compound C=1C=CC=CC=1C(N=C=O)(N=C=O)C1=CC=CC=C1 LNWBFIVSTXCJJG-UHFFFAOYSA-N 0.000 description 1
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Abstract
barrier strip for sealing a gap between adjacent panels of a building structure to reduce transmission of a fluid and/or heat through the gap, the building structure having two generally vertically or horizontally extending adjacent panels each having a chamfered edge such that the space between opposing chamfered edges forms part of the gap between the panels, the barrier strip comprising a body section and a head section wherein the body section is constructed from a fire resistant material and the head section is an enlarged section, extending outwardly on either side of the body section, having a profile corresponding to the profile of the part of the gap that is located between the chamfered edges of the panels, wherein the barrier strip is insertable between the adjacent panels such that the enlarged head abuts the chamfered edge to achieve correct depth location in the gap and the body section is adapted to form a friction fit between the edges of the panels to form a seal to secure the strip in the gap to seal the gap between the panels and reduce the transmission of the fluid and/or heat through the gap. ween opposing chamfered edges forms part of the gap between the panels, the barrier strip comprising a body section and a head section wherein the body section is constructed from a fire resistant material and the head section is an enlarged section, extending outwardly on either side of the body section, having a profile corresponding to the profile of the part of the gap that is located between the chamfered edges of the panels, wherein the barrier strip is insertable between the adjacent panels such that the enlarged head abuts the chamfered edge to achieve correct depth location in the gap and the body section is adapted to form a friction fit between the edges of the panels to form a seal to secure the strip in the gap to seal the gap between the panels and reduce the transmission of the fluid and/or heat through the gap.
Description
EXPANSION JOINT
FIELD
The present description relates generally to products for
sealing building structures, and to methods of installing
the sealing products.
In one form the present description relates to products
for sealing the joint between adjacent panels,
particularly between adjacent wall or floor panels of a
commercial building or utilitarian building, such as for
example, a farm building or similar, and to methods of
installing the sealing products to seal the joint between
the panels of the building.
In one form the present description relates to sealing
products in the form of inserts for location intermediate
the edges of adjacent panels of a building to form an
expansion joint therebetween so as to occupy any space or
gap formed between the edges of the panels to seal the
joint between the panels of the building.
The present description finds particular application as a
sealing product in the form of an expansion joint for
location between adjacent panels of a building to inhibit
transmission of fluid and/or heat through the joint, such
as for example, preventing ingress of water or fire into
the building through the joint.
Although the present description will be directed to
describing embodiments of the sealing product and their
use, it is to be noted that the scope of protection is not
limited to the described embodiments, but rather the scope
of protection is more extensive so as to include other
forms and variations of the sealing products and their
respective components and compositions, and their uses in
applications other than specifically described.
BACKGROUND
When constructing building structures, such as for
example, utilitarian buildings including warehouses and
similar, one of the concerns of the building contractors
is to make the building water and/or fireproof by
providing a water and/or fire proof seal between the
various building products being assembled together to
construct the building, such as for example, joining the
various components to one another in a waterproof manner.
One of the areas where water or fire can enter the
building is through the joint between adjacent wall panels
of the building. Previous attempts to form an efficacious
and durable seal between the wall panels have not been
entirely successful for one reason or another, partly due
to the nature and composition of the joint itself, and
partly due to expansion and contraction of the various
components forming the joint at different rates as the
building is exposed to harsh extremes of weather.
Disadvantages of traditional expansion joints formed by
caulking include:
(i) flow of the liquid sealing compound from the gap;
(ii) inconsistent thickness of the formed seal; and
(iii) lack of protection from fire and/or water.
In the past it was necessary to use a suitable chemical
compound or composition, such as for example a sealing
compound or adhesive compound in the form of a silicon
rubber or similar to fill the space or gap between the
edges of the adjacent wall panels. Having to add a sealing
layer of a suitable chemical compound or composition often
results in degradation or destruction of the chemical seal
between the wall panels due to deterioration of the
chemical compound or composition itself and/or due to
shrinkage of the chemical compound or composition away
from the edges of the panels resulting in formation of
gaps, voids or spaces in the joint allowing the ingress of
water or heat there through and into the interior of the
building. The flow of water through the joint may further
exacerbate the deterioration of the joint.
Accordingly, there is a need for a sealing product which
more effectively seals the joint between adjacent panels
of a building and/or is more durable so as to be longer
lasting so as to maintain the seal and/or is more
resistant to changes or movement of the floor or wall due
to extreme fluctuations in temperature.
SUMMARY
In this specification, the expansion joint is in the form
of a barrier strip for sealing a gap between adjacent
panels of a building structure.
In this specification, reference to “sealing” of the gap
involves the introduction of a material, such as a barrier
strip, to fill at least part of the gap to reduce or
hinder the transmission of the fluid and/or heat through
the gap.
According to one form of the present invention there is
provided a barrier strip for sealing a gap between
adjacent panels of a building structure to reduce
transmission of a fluid and/or heat through the gap, the
building structure having two generally vertically or
horizontally extending adjacent panels each having a
chamfered edge such that the space between opposing
chamfered edges forms part of the gap between the panels,
the barrier strip comprising a body section and a head
section, wherein the body section has a profile
corresponding to the profile of the gap extending from the
chamfered edges of the panels and is constructed from a
fire resistant material, and the head section is an
enlarged section, extending outwardly on either side of
the body section, having a profile corresponding to the
profile of the part of the gap that is located between the
chamfered edges of the panels, wherein the barrier strip
is insertable between the adjacent panels such that the
enlarged head abuts the chamfered edge to achieve correct
depth location in the gap and the body section is adapted
to form a friction fit between the edges of the panels to
form a seal to secure the strip in the gap to seal the gap
between the panels and reduce the transmission of the
fluid and/or heat through the gap.
According to another form of the present invention there
is provided a barrier for sealing a gap between adjacent
panels of a building structure to reduce transmission of a
fluid and/or heat through the gap, the building structure
having two generally vertically or horizontally extending
adjacent panels each having a chamfered edge such that the
space between opposing chamfered edges forms part of the
gap between the panels, the barrier comprising a barrier
strip according to another form of the invention, wherein
the barrier strip is inserted between the adjacent panels
such that the enlarged head abuts the chamfered edge to
achieve correct depth location in the gap and the body
section is adapted to form a friction fit between the
edges of the panels to form a seal to secure the strip in
the gap to seal the gap between the panels and reduce the
transmission of the fluid and/or heat through the gap.
According to one form of the present invention there is
provided a method of forming a barrier between two
generally vertically or horizontally extending panels of a
building structure, each having a chamfered edge, that are
positioned adjacent to each other having a gap
therebetween, the method including the step of: inserting
a barrier strip according to another form of the invention
into the gap between the adjacent panels such that the
enlarged head abuts the chamfered edges to achieve correct
depth location in the gap and the body section forms a
friction fit between the edges of the panels to form a
seal to secure the strip in the gap to seal the gap
between the panels and reduce the transmission of the
fluid and/or heat through the gap.
BRIEF DESCRIPTION OF EMBODIMENTS
In this specification, a skilled person would appreciate
that while the invention is applicable to both wall and
floor panels, it is particularly useful to wall panels.
Forms of the building structures include generally
vertically or horizontally extending panels, arranged
adjacent to each other to form a wall or a floor of the
building structure.
Although the panels can be made from any suitable or
convenient material and have any suitable or convenient
form, size, style, shape, or similar, preferred forms of
the panels are in the form of sheets, panels, partitions,
cladding, facades or similar material.
In one form, the panel is substantially uniform in
composition, such as for example, being of a grade of
concrete having properties and characteristics suitable
for the intended purpose of the building structure.
In one form, the panel is made from concrete or concrete35 like material, typically in the form of a slab, more
typically in the form of a reinforced slab of concrete
containing mesh reinforcement.
Forms of the barrier strip have any suitable or convenient
characteristics or properties, typically dependent upon
the end use of either the barrier strip or the building
structure in which the barrier strip is to be located.
Suitably, the barrier strip possesses weather-resistant
properties. For example, the barrier strip is made of a
material that includes one or more of the following
properties:
expandable and contractable depending on temperature
without failing or fracturing
flame or fire resistant/proof
water resistant/proof
UV-resistant
In one form the barrier strip, in addition to being an
expansion joint, is also flame resistant or fire
resistant. Forms of the expansion joint inhibit, prevent
or retard the spread of fire or flames through the joint,
particularly if the fire resistant expansion joint is
additionally sealed with a fire retardant or fire
resistant bonding agent, such as for example a fire
resistant grout or similar. The barrier strip may also be
UV-resistant.
Forms of the material of the barrier strip may be rigid
materials, semi-rigid materials, flexible materials,
compressible materials, resiliently deformable materials,
or similar.
Forms of the semi-rigid material or deformable material of
the barrier may include the barrier being resiliently
deformable, malleable, deformable but resuming
substantially the shape before deformation, or similar.
The fire resistant material may have a density ranging
from 44 and 48kg/m³.
The fire resistant material may have a flame spread index
(FSI) ranging from 10-20. Suitably, the fire resistant
material has a FSI of about 15.
The fire resistant material may have a smoke developed
index (SDI) ranging from 100-200. Suitably, the fire
resistant material has a SDI of about 150.
The fire resistant material may comply with the
requirements of ASTM E84 and/or ASTM C795.
The barrier strip may be made of a material that enables
the barrier strip to be painted or rendered. Suitably, the
barrier strip is made of a material that forms a strong
bond with paint and/or render material.
One preferred fire resistant material of the barrier strip
is marketed by BASF under the name ELASTOPOR PH 1640 which
is a rigid polyisocyanurate (PIR) closed cell foam based
on mixture of polyols, poly-diphenylmethane diisocyanate
and a suitable or convenient blowing agent, such as for
example, a blowing agent using zero ozone depletion
potential (ODP) blowing agent technology (HFC).
The barrier may include an insert for adapting to the
space, void or gap between the panels to secure the
barrier strip. The insert may be a gasket or a material
having gasket-like properties or characteristics, such as
for example compressibility or similar. The insert may be
secured in the gap to receive the barrier strip.
Preferred materials and/or compositions from which the
barrier strip can be manufactured include polyurethanes,
urethanes, closed cell urethanes, open cellular urethanes
or polyurethanes, foamed materials, cured materials,
cross-linked materials, thermoset materials, thermoplastic
materials, ethers, polyethers, elastomers, resiliently
deformable polymers, rubbers, rubber-like materials
including nitriles, EDPM, styrene butadiene rubbers,
mouldable materials, aerated materials or similar
materials including naturally occurring materials and
synthetic materials.
One preferred material is a rigid or semi-rigid material,
typically a urethane marketed by Pacific Urethanes under
the name Urepak Rigid 90 43 which is a low reactivity
polyurethane rigid foam based on polyester polyol, PMDI
isocyanate (methylene-4,4’-diphenyl diisocyanate and
associated polymeric isocyanates) and a suitable or
convenient blowing agent, such as for example, a blowing
agent using zero ozone depletion potential (ODP) blowing
agent technology (HFC).
The polyurethane foam can be dispensed through low and
high pressure equipment or can be hand-mixed and poured.
The foam is provided in the form of a high performance
block foam, typically having a core density ranging from
to 40 kg per cubic meter for general purpose thermal
insulation applications. Suitably, the core density is
about 34 kg per cubic metre.
Typical properties or characteristics of the Urepak Rigid
90 43 include the following:
Part A (Urepac™ Rigid 90 43) Specification:
1100kg per 1000L IBC, 220kg per 205L Closed top drum.
Specific Gravity (22°C): 1.10 ± 0.02 g/ml
Viscosity (Brookfield) (22°C): 400 ± 100 m.Pas
Appearance: Clear Straw liquid
Part B (Urepac™ 2001 PMDI) Specification:
250kg per 205L Closed top drum.
Specific Gravity (22°C): 1.23 ± 0.02 g/ml
Viscosity (Brookfield) (22°C): 210 ± 70 m.
Appearance: Clear Brown liquid
Processing Conditions:
Temperature
The temperature of both components should be maintained at
- 25°C to ensure that a sufficient mix and reaction is
obtained. The temperature of the mould boxes should be
maintained between 25-30°C to achieve optimal finished
product. As such, the optimal temperature range for
forming the barrier strip ranges from 20-30°C.
Cured Foam Properties
Mix Ratio 100 Polyol (Rigid 90 43): 140 PMDI (UrePac 2001)
(w/w)
Cream Time (22°C): 90±10 seconds
String time (22°C): 300±20 seconds
Rise time (22°C): 420±20 seconds
Free Rise Density (22°C): 40-45 Kg/m3
Obtained from Laboratory cup test
Core Density: 39±1 Kg/m3
Closed Cell Content: 90-95%
K Value: 0.022±0.002 W/mK
Compressive Strength: 200±10 KPa
Water Absorption: <1% by volume
Temperature Range: -30 to 120°C
Forms of the materials from which the barrier strips are
produced include any suitable or convenient form, type,
size, composition, style or profile. Preferred forms of
the manufactured materials for producing the barrier
strips include sheets, slabs, blocks, panels, or the like.
The body section and the head section of the barrier strip
may be formed integrally.
The body section may have a planar profile. Suitably, the
body section is a substantially oblong shaft. Having such
a profile allows the body section to form a friction fit
in the gap between the panels which minimises air gaps.
The body section may extend more than half way into the
gap. This improves the insulating properties of the
barrier strip by increasing the amount of insulation in
the gap.
At least one of the body section and the head section may
be covered in a waterproof membrane. This may reduce or
prevent ingress of water into the gap between the two
panels.
Although any suitable or convenient form of shaping or
profiling the block of foam or other material may be used,
it is preferred that the block be shaped using laser beams
or similar, such as for example using a machine which is
known as a “Fast Wire Profiling Machine” often referred to
as “Fastwires”. One description of a “Fastwire” is an
abrasive wire machine that is effectively a wire saw which
effectively have a high-speed electric motor driving an
abrasive wire that is able to cut through a variety of
foam types. One manufacturer of such machines is “Wintech”
which provide an economical solution for cutting a wide
range of materials.
Forms of the barrier strip include being substantially
elongate strips, in which an end portion of the body
section has a width of at least 5 mm, preferably from
about 10 mm to about 30 mm, more preferably being about 10
mm, about 17 mm, about 20 mm, about 25 mm.
Forms of the barrier strip have a head section having a
width of at least 20 mm, preferably from about 20 mm to
about 50 mm, more preferably from about 30 to about 40 mm,
even more preferably about 37 mm.
The head section may have a tapering edge having an angle
ranging from 20-60° from the vertical axis, preferably,
-50° from the vertical axis, more preferably, 30-50°
from the vertical axis, even more preferably, about 30°
from the vertical axis.
Forms of the barrier strip have a body section having a
generally cross-sectional width ranging from about 10 mm
to about 50 mm, preferably ranging from about 15 mm to
about 40 mm, more preferably being about 15 mm, about 19
mm, about 23 mm, about 26 mm, about 29 mm, about 35 mm,
about 40 mm.
Forms of the barrier strip have a height of ranging from
70-120 mm, preferably ranging from 80-100 mm, more
preferably, ranging from 90-100 mm, even more preferably
about 95 mm.
The strip can have any convenient or suitable length,
typically up to about 3 m, more typically up to about 2.5
m, even more typically up to about 2.4 m, and most
typically about 1.5 m.
The barrier strip can be formed from the sheet or block of
suitable material by cutting multiple lengths or sections
from the sheet or block, typically using suitable cutting
means or devices, such as for example cutting blades
located in substantially parallel spaced apart
relationship to one another in which the spacing apart of
the blades corresponds to the height of the individual
barrier strip. In forms of the cutting device, the spacing
between individual blades is substantially constant
whereas in other forms the spacing between individual
blades is variable so that barrier strips having different
heights can be produced simultaneously, typically a fast
wire machine using a rotating wire to cut polyurethane
foam into strips having a predetermined width.
The barrier strip may include a securing means for
securing the strip to the edges of the panels. Suitably,
the securing means is an adhesive, bonding agent, glue,
paste, gel, or other material or chemical composition for
fixedly adhering the barrier strip to the edge of the
panel. However, it is to be noted that other means for
attaching the barrier strip to the edge of the panels are
possible.
Forms of the adhesive can be a permanent adhesive or be a
releasable adhesive, typically in the form of a tacky or
sticky adhesive or similar. A preferred adhesive is a
general purpose double coated tissue tape manufactured by
3M under the product code #9075 which is an acrylic
adhesive double side silicone treated/poly coated liner,
typically having a thickness of adhesive of 0.08 mm. A
preferred construction of the tape is a 4 layer
construction of acrylic adhesive, tissue, acrylic adhesive
and poly coated liner in which the acrylic adhesive is
cross-linked and tackified.
Forms of the expansion joint, particularly fire inhibiting
expansion joints are provided with a body section or
segment having a generally constant cross section, and a
head section being an enlarged section, more typically a
symmetrically enlarged head section extending outwardly on
either side of the constant width wall section.
The enlarged head may be adapted to form a plug or a wedge
when inserted into the gap.
In one form the enlarged head section is an enlarged
section having tapered edges, typically a tapered edge on
both sides of the expansion joint.
Having the enlarged head abut the chamfered edges of the
panels when the barrier strip is inserted into the gap
enables correct depth location in the gap by minimising
the risk of the barrier strip being pushed too deep into
the gap.
The enlarged head allows the barrier strip to be inserted
into the gap without tools.
The tapered edges may be angled to conform to any
chamfered edges of the panels such that the installed
barrier strip is substantially flush with the surface of
the panels. This allows the wall to be rendered or painted
to form a substantially smooth surface finish.
The tapered edges may be adapted to receive an adhesive to
secure the barrier strip to the chamfered panel edges.
The body section may include a plurality of projections.
In embodiments in which the body section includes a
plurality of projections, the barrier strip may be applied
to the insert such that projections of the barrier strip
are embedded in the insert.
The projections on the barrier strip may enhance grip
between the strip and the edges of the panels when the
strip is inserted in the gap between the panels. The grip
between the panels and the barrier strip may be a friction
grip in which the projections press against the surface on
the edges of the panels or an anchor grip in which the
projections embed themselves into the edges of the panels.
The projections of the barrier strip may be barbs that
embed into the edges of the panels.
The projections may be ribs that press against the surface
of the edges of the panels.
The method of forming a barrier using the barrier strip
may involve securing the barrier strip in the gap by
adhering the head section of barrier strip to the
chamfered panel edges.
BRIEF DESCRIPTION OF DRAWINGS
Embodiments of the barrier strip of the present
description will now be described with reference to the
accompanying drawings in which
Figure 1 is a cross-sectional view of a barrier strip
according to one form of the present invention.
Figure 2 is a perspective view of the barrier strip
according to Figure 1.
Figure 3 is an illustration of the barrier strip of Figure
1 installed between two wall panels.
Figure 4 is a cross-sectional view of a barrier strip
according to another form of the present invention.
Figure 5 is a perspective view of the barrier strip
according to Figure 4.
DESCRIPTION OF SPECIFIC EMBODIMENT
One form of the expansion joint as defined by the
invention is a barrier strip marked as 10 in Figures 1 and
2.
The barrier strip has a body section 12 and an enlarged
head portion 14 having a pair of oppositely inclined
tapering edges 16 located on either side of the body
section 12 and extending outwardly therefrom. The body
section 12 has a substantially oblong shape which
corresponds with the profile of a gap between adjacent
wall panels and fits into the gap.
In this embodiment, the body section 12 forms a tight
friction fit between the edges of the panels to form a
seal. This feature maximises the contact surface area
between the barrier strip and the edges of the panels
which provides several advantages including: 1) increasing
the strength of the bond between the barrier strip and the
edges of the panels; 2) reducing the penetrability of
water through the gap between the adjacent wall panels;
and 3) removing air pockets between the adjacent wall
panels which could otherwise potentially provide a flame
path in the event the barrier is exposed to fire.
The barrier strip 10 is made from a rigid polyisocyanurate
(PIR) closed cell foam. Suitably, the material used to
form barrier strip 10 is ELASTOPOR PH 1640.
Selected properties of ELASTOPOR PH 1640 is set out below.
Chemical properties:
Viscosity at 25°C
Polyol component 1130 mPas
Isocyanate component 150~350
mPas
Specific gravity at
°C (DIN 51757)
Polyol component with 141b
1.22 cm3/g
Isocyanate component
1.23~1.24 cm3/g
Water content 0.37 ±0.1%
Physical properties:
Reactivity at 20 / 20°C Hand
mix
● Chemical temp. : 20 / 20°C, mix speed:
1500 rpm, 20 sec
● Cream time (sec.) 75
● Gel time (sec.) 190
● Rise time (sec) -
● Free rise density (kg/m3) 45
Foam property (by hand mix - speed Mixer 1500 rpm and
Mixer diameter 65 mm):
Property Standard Unit Value
Core density DIN EN ISO
845 kg/m³ 45
Compressive strength
(Parallel) DIN 53421 kgf/cm² 2.77
Compressive strength
(Vertical) DIN 53421 kgf/cm² 1.53
Dimension stability
(-30°C x 24hr) % -0.37
Dimension stability
(70°C x 24hr) % 0.15
‘K’ factor DIN 52612 W/mK 0.0236
The barrier strip 10 is formed by using an abrasive wire
machine such as “Fastwires” to cut the foam into the
desired shape and dimensions and a strip of double sided
tape 20 is applied to each of the tapering edges 16.
Generally, the barrier strip 10 has a length L of about
1.5m and a height H of about 95 mm, and the head portion
14 has a width W1 of about 37 mm and tapering edges 16
have an acute angle α of about 30° from the vertical axis.
Other dimensions of the barrier strip may vary depending
on its application (Figures 1 and 2).
A preferred double sided tape is a general purpose double
coated tissue tape manufactured by 3M under the product
code #9075 which is an acrylic adhesive double side
silicone treated/poly coated liner, typically having a
thickness of adhesive of 0.08 mm.
Another form of the expansion joint as defined by the
invention is a barrier strip marked as 110 in Figures 4
and 5. The barrier strip has a body section 112 and an
enlarged head portion 114 having a pair of oppositely
inclined tapering edges 116 located on either side of the
body section 112 and extending outwardly therefrom. A
plurality of projections in the form of barbs 118 extends
from the body section 112 and having a direction that is
opposite to the direction the barrier strip 110 is applied
to a gap between adjacent wall panels.
In one embodiment, the body section 112, including the
barbs 118, has a cross-sectional width W2 of about 29 mm
along the main body section 112, and an end section 122
width W3 of about 20 mm.
In another embodiment, the body section 112, including the
barbs 118, has a cross-sectional width W2 of about 19 mm
along the main body section 112, and an end section 122
width W3 of about 10 mm.
In yet another embodiment, the body section 112, including
the barbs 118, has a cross-sectional width W2 of about 26
mm along the main body section 112, and an end section 122
width W3 of about 17 mm.
In a further embodiment, the body section 112, including
the barbs 118, has a cross-sectional width W2 of about 34
mm along the main body section 112, and an end section 122
width W3 of about 25 mm.
In use, panels 24 are erected to form a wall of a building
structure having a gap or clearance 26 between the two
panels which requires sealing so as to be water resistant
and/or flame resistant to prevent the spread or
propagation of water, fire or flames through or past the
gap or clearance. Typically, the edges 28 of the panels
24 are chamfered.
The protective strip of the double-sided tape 20 is
removed to expose the adhesive and the barrier strip 10 is
inserted by hand into the gap 26 to locate within the gap
or clearance (Figure 3). When inserted, the shaft fills
the space in the gap between the panels which removes any
air pockets in the gap. The enlarged head portion 14
completely fills the entrance or opening of the gap or
clearance with the tapering edges abutting the chamfered
edges 28 of the panels 24. This enables the adhesive on
the exposed double sided tape 20 to secure the barrier
strip 10 in the gap.
In embodiments of the barrier strip including barbs on the
body section, the direction of the barbs 118 causes the
barbs to deform outwardly to press against the edges of
the panels and generate a resistance force when an
outwardly force is applied to the barrier strip to remove
it from the gap. The resistance force reduces the
likelihood of the barrier strip dislodging from the gap
26.
After installation, the top surface 30 of the head portion
14 is substantially flush with the top surface 32 of the
panels 24 to form a generally smooth wall surface that is
suitable for rendering or painting (Figure 3). It can be
appreciated that other embodiments of the barrier strip
have a top surface 30 that projects from or forms a recess
on the top surface 32. The sealed wall is fireproof,
flameproof or at least compliant with the Building Code of
Australia (BCA) relating to the propagation of fire in
building structures. If necessary, a suitable fire
retardant, inhibiting or resistant material, such as for
example, a fire grout or similar may be applied over the
inserted barrier strip to enhance the fire resistance of
the wall. It is to be noted that other forms of the
barrier strip are possible, as is the use of the various
forms of the barrier strip in other applications.
In the claims which follow and in the preceding
description of the invention, except where the context
requires otherwise due to express language or necessary
implication, the word “comprise” or variations such as
“comprises” or “comprising” is used in an inclusive sense,
i.e. to specify the presence of the stated features but
not to preclude the presence or addition of further
features in various embodiments of the invention.
It will be understood to persons skilled in the art of the
invention that many modifications may be made without
departing from the spirit and scope of the invention.
It is to be understood that, if any prior art publication
is referred to herein, such reference does not constitute
an admission that the publication forms a part of the
common general knowledge in the art, in Australia or any
other country.
ADVANTAGES
Advantages of one or more embodiments of the expansion
joint include one or more of the following.
One advantage of the barrier strip is that the strip can
be used as an expansion joint.
Another advantage of the barrier strip is that the strip
can be used as a separator between the concrete slabs of
the wall.
Another advantage of the barrier strip is that it replaces
caulking which is often time consuming and difficult to
perform.
Claims (21)
1. A barrier strip for sealing a gap between adjacent panels of a building structure to reduce transmission of a 5 fluid and/or heat through the gap, the building structure having two generally vertically or horizontally extending adjacent panels each having a chamfered edge such that the space between opposing chamfered edges forms part of the gap between the panels, the barrier strip comprising a 10 body section and a head section wherein the body section is constructed from a fire resistant material and the head section is an enlarged section, extending outwardly on either side of the body section, having a profile corresponding to the profile of the part of the gap that 15 is located between the chamfered edges of the panels, wherein the barrier strip is insertable between the adjacent panels such that the enlarged head abuts the chamfered edge to achieve correct depth location in the gap and the body section is adapted to form a friction fit 20 between the edges of the panels to form a seal to secure the strip in the gap to seal the gap between the panels and reduce the transmission of the fluid and/or heat through the gap. 25
2. The barrier of claim 1, wherein the body section having a profile corresponding to the profile of the gap.
3. The barrier strip of either claim 1 or 2, wherein the body section is a substantially oblong shaft. 30
4. The barrier of any one of the preceding claims, wherein the body section extends more than half way into the gap. 35
5. The barrier strip of any one of the preceding claims, wherein at least one of the body section and the head section is covered with a waterproof membrane.
6. The barrier strip of any one of claims, wherein the profile of the head section is adapted to receive an adhesive to secure the barrier strip to the chamfered 5 panel edges.
7. The barrier strip of claim 6, wherein the adhesive is a double sided adhesive tape. 10
8. The barrier strip of any one of the preceding claims, wherein the fire resistant material has a density ranging from 44 and 48kg/m³.
9. The barrier strip of any one of the preceding claims, 15 wherein the fire resistant material has a flame spread index (FSI) ranging from 10-20.
10. The barrier strip of claim 9, wherein the fire resistant material has a flame spread index (FSI) of 15. 20
11. The barrier strip of any one of the preceding claims, wherein the fire resistant material has a smoke developed index (SDI) ranging from 100-200. 25 12. The barrier strip of claim 11, wherein the fire resistant material has a smoke developed index (SDI) of
150.
13. The barrier strip of any one of the preceding claims, 30 wherein the fire resistant material complies with the requirements of ASTM E84 and/or ASTM C795.
14. The barrier strip of any one of the preceding claims, wherein the fire resistant material is a rigid 35 polyisocyanurate closed cell foam.
15. The barrier strip of any one of the preceding claims, wherein the fire resistant material has a core density ranging from 20 to 40 kg per cubic meter.
16. The barrier strip of any one of the preceding claims including an insert for adapting to the space, void or gap between the panels to secure the barrier strip. 5
17. The barrier strip of any one of the preceding claims wherein the barrier strip is UV-resistant.
18. A barrier for sealing a gap between adjacent panels 10 of a building structure to reduce transmission of a fluid and/or heat through the gap, the building structure having two generally vertically or horizontally extending adjacent panels each having a chamfered edge such that the space between opposing chamfered edges forms part of the 15 gap between the panels, the barrier comprising a barrier strip according to any one of claims 1 to 16, wherein the barrier strip is inserted between the adjacent panels such that the enlarged head abuts the chamfered edge to achieve correct depth location in the gap and the body section is 20 adapted to form a friction fit between the edges of the panels to form a seal to secure the strip in the gap to seal the gap between the panels and reduce the transmission of the fluid and/or heat through the gap. 25
19. The barrier of claim 18, wherein the head section is substantially flush with the surface of the panels.
20. A method of forming a barrier between two generally vertically or horizontally extending panels of a building 30 structure, each having a chamfered edge, that are positioned adjacent to each other having a gap therebetween, the method including the step of: inserting a barrier strip according to any one of claims 1 to 16 into the gap between the adjacent panels such that the 35 enlarged head abuts the chamfered edges to achieve correct depth location in the gap and the body section forms a friction fit between the edges of the panels to form a seal to secure the strip in the gap to seal the gap between the panels and reduce the transmission of the fluid and/or heat through the gap. 5
21. The method of claim 20, involving the step of securing the barrier strip in the gap by adhering the head section of barrier strip to the chamfered panel edges.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2018902858 | 2018-08-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ756101A true NZ756101A (en) |
Family
ID=
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