GB2310222A - Cavity wall tie system - Google Patents
Cavity wall tie system Download PDFInfo
- Publication number
- GB2310222A GB2310222A GB9602896A GB9602896A GB2310222A GB 2310222 A GB2310222 A GB 2310222A GB 9602896 A GB9602896 A GB 9602896A GB 9602896 A GB9602896 A GB 9602896A GB 2310222 A GB2310222 A GB 2310222A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wall
- tie
- cavity
- cavity wall
- tie system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 210000003608 fece Anatomy 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 101100481408 Danio rerio tie2 gene Proteins 0.000 description 3
- 101100481410 Mus musculus Tek gene Proteins 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4178—Masonry wall ties
- E04B1/4185—Masonry wall ties for cavity walls with both wall leaves made of masonry
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Load-Bearing And Curtain Walls (AREA)
Description
CAVITY WALL TIE SYSTEM
This invention relates to a cavity wall tie system
Masonry walls have previously been built in cavity wall construction.Two masonry leaves or panels may be built with a gap or cavity between to form the complete wall.The leaves are linked with wall ties which share some loads between the two leaves.Wind loads, for instance,applied horizontally to the outside leaf, are resisted by both the inner and outer leaves of the wall.
Wall ties used previously have transferred load between the two leaves but have generally not increased the strength of the wall.The total strength of a completed cavity wall in vertical bending has thus been the sum of the strengths of the two wall leaves.
Various types of ties and reinforcement are known in the prior art which strengthen masonry in bending about perpendicular end joints and thus strengthen the wall in horizontal bending.
A tie system is known in the prior art in which sloping ties are installed to form a trusts. In that system, however, ties slope both from the outer wall leaf down towards the inner leaf and vice versa. In that system the transfer of damp from the outer leaf to the inner leaf canot realistically be avoided.
The present invention is unique in providing a simple method of strengthening cavity walls in bending about bed joints and thus in vertical bending without the use of additional wind posts or other special equipment.
The present invention is also much simpler to construct than the system of diaphragm walls which is known in the prior art. In this system the two leaves are linked by connecting masonry walls built across the cavity.
The present invention provides a method of linking masonry cavity wall leaves with ties which form a truss within the wall so that the ability of the wall to resist horizontal load by in vertical bending is greatly increased. Conveniently the ties may be made of a suitable metal such as galvanised iron, steel or mild steel or stainless steel.
A significant feature of this unique system is that the diagonal 'truss' members slope in one direction only, down towards the outer leaf of the wall. This is critical as it prevents water and damp being transferred from the outer leaf to the inner leaf. This requires that the tie members must act both in tension and compression. To assist in the shedding of water ties may be twisted to form a drip.
The present invention offers the following advantages over previously available methods of strengthening a masonry wall in vertical bending: (i) The tie system is almost as simple to install as traditional wall ties.
(ii) The shape and disposition of the ties in the system are such that water
penetrating the outer leaf will not cross the cavity to the inner leaf.
(iii) No extra posts need to be installed to support the wall.
(iv) The system may be installed as the wall is built so that no special
supports or construction sequence are needed.
(v) Heat is not transferred across the cavity between the leaves of the wall.
(vi) Standard, simple shapes of masonry units may be used.
A specific embodiement of the invention will now be described by way of nonlimiting example with reference to the accompanying drawings in which:
Figure 1 shows a section through the two leaves of a cavity wall with
the tie system seen in elevation. A reduced-scale elevation of a sloping
tie 2 is seen clouded.
Figure 2 shows a plan on the wall at mid height. Figure 3 shows a plan
close to the base of the wall. This shows how multiple sloping ties may
be used towards the top and bottom of the wall where the tie forces
increase.
Referring to the drawings the tie system comprises a horizontal tie 1 and a sloping tie 2 as well as the masonry units 3. Ties need to be stiff enough to carry compression as well as tension loading.
The sloping tie 2 is bent at each end to allow it to fit into the bed joints of the masonry.
Ties are provided with fishtail ends or other end details which adequately anchor the ties into the masonry bed joints.
The stiffness of the tie system may be adjusted by altering the dimensions of the various components as well as the spacing of the wall leaves. This may be
necessary to avoid thermal or moisture movements in one leaf having an
unwelcome effect on the other leaf.
The shapes of the tie system components may be adjusted to improve their
capacities to shed water or mortar droppings.
The tie system may be used with various masonry materials. The masonry in
the two leaves need not be of the same material.
A row of ties are built into the wall one above the other to stiffen and
strengthen a section of the wall from top to bottom. Several vertical rows of
ties are installed to strengthen a complete wall.
Claims (4)
1. A cavity wall tie system which uses simple tie components to link the
two leaves of a masonry wall in a truss-like arrangement and which
strengthens the wall in vertical bending, that is in bending about the bed
joints of the masonry. No tie components slope towards the inner wall
leaf. The tie components may be installed as the wall is constructed in
a similar manner to traditional cavity wall ties.The system avoids
transfer of damp or heat across the cavity. The system does not require
the use of additional wind posts or special masonry units. Ties work in
both tension and compression to produce truss action.
2. A cavity wall tie system substantially as described herein with reference
to figures 1-2 of the accompanying drawings.
3. A cavity wall tie system substantially as described in Claims 1 and 2 but
with dimensions of the various components adjusted to change the
stiffness of the wall tie system.
4. A cavity wall tie system substantially as described in Claims 1,2 and 3
but with the shapes of the various components altered to improve the
capacity of the wall tie system to shed water or mortar droppings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9602896A GB2310222B (en) | 1996-02-13 | 1996-02-13 | Cavity wall tie system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9602896A GB2310222B (en) | 1996-02-13 | 1996-02-13 | Cavity wall tie system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9602896D0 GB9602896D0 (en) | 1996-04-10 |
| GB2310222A true GB2310222A (en) | 1997-08-20 |
| GB2310222B GB2310222B (en) | 2000-05-10 |
Family
ID=10788603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9602896A Expired - Fee Related GB2310222B (en) | 1996-02-13 | 1996-02-13 | Cavity wall tie system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2310222B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB576569A (en) * | 1944-01-24 | 1946-04-10 | Livingstone Construction Compa | Improvements relating to building units |
-
1996
- 1996-02-13 GB GB9602896A patent/GB2310222B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB576569A (en) * | 1944-01-24 | 1946-04-10 | Livingstone Construction Compa | Improvements relating to building units |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2310222B (en) | 2000-05-10 |
| GB9602896D0 (en) | 1996-04-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20010213 |