GB2139263A - Improvements in or relating to formwork - Google Patents

Improvements in or relating to formwork Download PDF

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Publication number
GB2139263A
GB2139263A GB08308589A GB8308589A GB2139263A GB 2139263 A GB2139263 A GB 2139263A GB 08308589 A GB08308589 A GB 08308589A GB 8308589 A GB8308589 A GB 8308589A GB 2139263 A GB2139263 A GB 2139263A
Authority
GB
United Kingdom
Prior art keywords
formwork
hollow member
vertical portion
foamed
synthetic resin
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.)
Withdrawn
Application number
GB08308589A
Other versions
GB8308589D0 (en
Inventor
Thomas John William Burge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG LINTELS Ltd
Original Assignee
IG LINTELS Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG LINTELS Ltd filed Critical IG LINTELS Ltd
Priority to GB08308589A priority Critical patent/GB2139263A/en
Publication of GB8308589D0 publication Critical patent/GB8308589D0/en
Publication of GB2139263A publication Critical patent/GB2139263A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces

Abstract

Formwork for supporting an arched head over a window or door opening in a wall of a building comprises a hollow member at least partially filled with a foamed synthetic resin material, and having an arched upper surface forming a support for bricks or blocks. The hollow member may be vacuum formed thermoplastic resin or a glass fibre reinforced resin. The filler may be polystyrene. GB Application 2 117 811 A is referred to.

Description

SPECIFICATION Improvements in or relating to formwork This invention relates to formwork for supporting an arched head over a window or door opening in a wall of a building, and it is an object of the invention to provide an improvement in, or a modification of, the invention forming the subject matter of Patent Application No. 83 04983.
In the said Application there is claimed a formwork for supporting an arched head over a window or door opening in a wall of a building, said formwork including a front horizontal portion spanning said opening; a front vertical portion upstanding from said front horizontal portion and having an arcuate upper edge; a rear vertical portion having a straight lower edge coplanar with said front horizontal portion; and an arched upper portion connecting the arcuate upper edge of the front vertical portion to the rear vertical portion and forming a support for a course of bricks, blocks, or the like, forming said arched head.
The present invention consists in a formwork for supporting an arched head over a window or door opening in a wall of a building, said formwork comprising a hollow member spanning said opening, wherein said hollow member includes a front vertical portion having an arcuate upper edge, a rear vertical portion, and an arched upper portion connecting the arcuate upper edge of the front vertical portion to the rear vertical portion and forming a support for a course of bricks, blocks, or the like forming said arched head, wherein said hollow member is at least partially filled with a foamed synthetic resin material.
It is to be understood that the hollow member may be similar to any of the embodiments described in the said Application No. 83 04983. Thus, formwork in accordance with the present invention may be substantially the same as formwork in accordance with the invention of the said Application No. 83 04983, except that the hollow member is at least partially filled with a foamed synthetic resin material.
It has been found that by filling the hollow member with foamed material it is possible to reduce the thickness of the maerial from which the hollow member is made. Furthermore, formwork in accordance with the present invention may have more rigidity and stability than formwork without the foamed material filling, and in addition will have better thermal qualities.
The hollow member may be made of glass reinforced synthetic resin material but it is preferred that it should be made of a weatherresistant thermoplastic synthetic resin material. In the latter case the hollow member is preferably produced from a sheet of the material by vacuum forming.
Particularly when the hollow member is made by vacuum forming, it has been found desirable to use a relatively thin sheet material, and accordingly the foamed filling is particularly useful in the case of formwork in which the hollow member is made in this way.
The foamed material used for filling the hollow member may be, for example, polystyrene. In this case the material will normaliy be inserted in the hollow member in the form of a solid block, or blocks, shaped to the required dimensions. Alternatively the filling material may be polyurethane, in which case it is preferably injected into the hollow member and foamed in situ.
1. A formwork for supporting an arched head over a window or door opening in a wall of a building, said formwork comprising a hollow member spanning said opening, wherein said hollow member includes a front vertical portion having an arcuate upper edge, a rear vertical portion, and an arched upper portion connecting the arcuate upper edge of the front vertical portion to the rear vertical portion and forming a support for a course of bricks, blocks, or the like forming said arched head, wherein said hollow member is at least partially filled with a foamed synthetic resin material.
2. A formwork as claimed in Claim 1, wherein the hollow member is made of glass fibre reinforced synthetic resin material.
3. A formwork as claimed in Claim 1, wherein the hollow member is made of a weather-resistant thermoplastic synthetic resin material.
4. A formwork as claimed in Claim 3, wherein the hollow member is produced from a sheet of said synthetic resin material by vacuum forming.
5. A formwork as claimed in any of the preceding Claims, wherein the foamed material is polystyrene.
6. A formwork as claimed in Claim 5, wherein the polystyrene is inserted in the hollow member in the form of a solid block or blocks.
7. A formwork as claimed in any of Claims 1-4, wherein the foamed material is polyurethane.
8. A formwork as claimed in Claim 7, wherein the polyurethane is injected into the hollow member and foamed in situ.
9. A formwork substantially as hereinbefore described.
10. Any features of novelty, taken singly or in combination, of the formwork hereinbefore described.
CLAIMS (2 Dec 1983)
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or relating to formwork This invention relates to formwork for supporting an arched head over a window or door opening in a wall of a building, and it is an object of the invention to provide an improvement in, or a modification of, the invention forming the subject matter of Patent Application No. 83 04983. In the said Application there is claimed a formwork for supporting an arched head over a window or door opening in a wall of a building, said formwork including a front horizontal portion spanning said opening; a front vertical portion upstanding from said front horizontal portion and having an arcuate upper edge; a rear vertical portion having a straight lower edge coplanar with said front horizontal portion; and an arched upper portion connecting the arcuate upper edge of the front vertical portion to the rear vertical portion and forming a support for a course of bricks, blocks, or the like, forming said arched head. The present invention consists in a formwork for supporting an arched head over a window or door opening in a wall of a building, said formwork comprising a hollow member spanning said opening, wherein said hollow member includes a front vertical portion having an arcuate upper edge, a rear vertical portion, and an arched upper portion connecting the arcuate upper edge of the front vertical portion to the rear vertical portion and forming a support for a course of bricks, blocks, or the like forming said arched head, wherein said hollow member is at least partially filled with a foamed synthetic resin material. It is to be understood that the hollow member may be similar to any of the embodiments described in the said Application No. 83 04983. Thus, formwork in accordance with the present invention may be substantially the same as formwork in accordance with the invention of the said Application No. 83 04983, except that the hollow member is at least partially filled with a foamed synthetic resin material. It has been found that by filling the hollow member with foamed material it is possible to reduce the thickness of the maerial from which the hollow member is made. Furthermore, formwork in accordance with the present invention may have more rigidity and stability than formwork without the foamed material filling, and in addition will have better thermal qualities. The hollow member may be made of glass reinforced synthetic resin material but it is preferred that it should be made of a weatherresistant thermoplastic synthetic resin material. In the latter case the hollow member is preferably produced from a sheet of the material by vacuum forming. Particularly when the hollow member is made by vacuum forming, it has been found desirable to use a relatively thin sheet material, and accordingly the foamed filling is particularly useful in the case of formwork in which the hollow member is made in this way. The foamed material used for filling the hollow member may be, for example, polystyrene. In this case the material will normaliy be inserted in the hollow member in the form of a solid block, or blocks, shaped to the required dimensions. Alternatively the filling material may be polyurethane, in which case it is preferably injected into the hollow member and foamed in situ. CLAIMS
1. A formwork for supporting an arched head over a window or door opening in a wall of a building, said formwork comprising a hollow member spanning said opening, wherein said hollow member includes a front vertical portion having an arcuate upper edge, a rear vertical portion, and an arched upper portion connecting the arcuate upper edge of the front vertical portion to the rear vertical portion and forming a support for a course of bricks, blocks, or the like forming said arched head, wherein said hollow member is at least partially filled with a foamed synthetic resin material.
2. A formwork as claimed in Claim 1, wherein the hollow member is made of glass fibre reinforced synthetic resin material.
3. A formwork as claimed in Claim 1, wherein the hollow member is made of a weather-resistant thermoplastic synthetic resin material.
4. A formwork as claimed in Claim 3, wherein the hollow member is produced from a sheet of said synthetic resin material by vacuum forming.
5. A formwork as claimed in any of the preceding Claims, wherein the foamed material is polystyrene.
6. A formwork as claimed in Claim 5, wherein the polystyrene is inserted in the hollow member in the form of a solid block or blocks.
7. A formwork as claimed in any of Claims 1-4, wherein the foamed material is polyurethane.
8. A formwork as claimed in Claim 7, wherein the polyurethane is injected into the hollow member and foamed in situ.
9. A formwork substantially as hereinbefore described.
1Q. Any features of novelty, taken singly or in combination, of the formwork hereinbefore described.
9. A formwork substantially as hereinbefore described.
10. Any features of novelty, taken singly or in combination, of the formwork hereinbefore described.
CLAIMS (2 Dec 1983)
1. A formwork for supporting an arched head over a window or door opening in a wall of a building, said formwork comprising a hollow member spanning said opening, wherein said hollow member includes a front vertical portion having an arcuate upper edge, a rear vertical portion, and an arched upper portion connecting the arcuate upper edge of the front vertical portion to the rear vertical portion and forming a support for a course of bricks, blocks, or the like forming said arched head, wherein said hollow member is at least partially filled with a foamed synthetic resin material.
2. A formwork as claimed in Claim 1, wherein the hollow member is made of glass fibre reinforced synthetic resin material.
3. A formwork as claimed in Claim 1, wherein the hollow member is made of a weather-resistant thermoplastic synthetic resin material.
4. A formwork as claimed in Claim 3, wherein the hollow member is produced from a sheet of said synthetic resin material by vacuum forming.
5. A formwork as claimed in any of the preceding Claims, wherein the foamed material is polystyrene.
6. A formwork as claimed in Claim 5, wherein the polystyrene is inserted in the hollow member in the form of a solid block or blocks.
7. A formwork as claimed in any of Claims 1-4, wherein the foamed material is polyurethane.
8. A formwork as claimed in Claim 7, wheren the polyurethane is injected into the hollow member and foamed in situ.
GB08308589A 1983-03-26 1983-03-26 Improvements in or relating to formwork Withdrawn GB2139263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08308589A GB2139263A (en) 1983-03-26 1983-03-26 Improvements in or relating to formwork

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08308589A GB2139263A (en) 1983-03-26 1983-03-26 Improvements in or relating to formwork

Publications (2)

Publication Number Publication Date
GB8308589D0 GB8308589D0 (en) 1983-05-05
GB2139263A true GB2139263A (en) 1984-11-07

Family

ID=10540400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08308589A Withdrawn GB2139263A (en) 1983-03-26 1983-03-26 Improvements in or relating to formwork

Country Status (1)

Country Link
GB (1) GB2139263A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1549428A (en) * 1977-07-22 1979-08-08 Smith G Combined formwork and cavity tray for a brick arch
GB2063953A (en) * 1980-05-20 1981-06-10 Press Bat Holdings Ltd Arch support

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1549428A (en) * 1977-07-22 1979-08-08 Smith G Combined formwork and cavity tray for a brick arch
GB2063953A (en) * 1980-05-20 1981-06-10 Press Bat Holdings Ltd Arch support

Also Published As

Publication number Publication date
GB8308589D0 (en) 1983-05-05

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)