GB2343687A - Plastic lintel with metal reinforcement - Google Patents

Plastic lintel with metal reinforcement Download PDF

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Publication number
GB2343687A
GB2343687A GB9824797A GB9824797A GB2343687A GB 2343687 A GB2343687 A GB 2343687A GB 9824797 A GB9824797 A GB 9824797A GB 9824797 A GB9824797 A GB 9824797A GB 2343687 A GB2343687 A GB 2343687A
Authority
GB
United Kingdom
Prior art keywords
block
lintel
reinforcement
load
elongate
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
Application number
GB9824797A
Other versions
GB2343687B (en
GB9824797D0 (en
Inventor
John Coyle
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.)
Keystone Lintels Ltd
Original Assignee
Keystone 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 Keystone Lintels Ltd filed Critical Keystone Lintels Ltd
Priority to GB9824797A priority Critical patent/GB2343687B/en
Publication of GB9824797D0 publication Critical patent/GB9824797D0/en
Publication of GB2343687A publication Critical patent/GB2343687A/en
Application granted granted Critical
Publication of GB2343687B publication Critical patent/GB2343687B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • 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
    • 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
    • E04C2003/023—Lintels

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

A lintel in the form of an elongate block (10) of plastic material foamed or expanded around a shaped reinforcement (12) of similar length. The reinforcement (12) is formed of metallic sheet material and has a top portion (14) at or near the top of the block (10) and two supporting leg portions (16,) which extend down from the top portion (14) to terminate at or near to the bottom of the block (10). The bottom of each leg (16) intended to be load bearing, has a load spreading plate (18), which may be positioned at right angles to the attitude of the axis of reinforcement. Elongate battens (22) and (24) can be included on the side and the top of the block (10) respectively.

Description

LINTELS This invention relates to an improved lintel particularly, but not necessarily, for outside walls of a building structure. Lintels are beams of metal or reinforced concrete to be used in bridging openings in walls, the openings being such as door openings, for doors or arches, or window openings. This invention is particularly concerned with non-cementitious lintels having shaped metal reinforcements.
A problem with a lintel made of metal is that the outer parts of it are exposed to outside and inside temperatures and cold bridging occurs, i. e. moisture condenses from the atmosphere on the metal part on the outside due to the metal part on the inside watt being at a higher temperature and the heat being conducted through the lintel from the outer part on the inside watt to the outer, part on the outside all. In double-skinned walls, several forms of a lintel of top-hat cross-section have been proposed, and found to be satisfactory regarding obviating or mitigating cold bridging, however, a disadvantage still exists for single-skinned walls.
It is an object of the present invention to obviate or mitigate this disadvantage.
Accordingly, the present invention is a lintel formed of an elongate block of plastics material foamed or expanded around a shaped reinforcement of similar length, the reinforcement being formed of metallic sheet material, and having a top portion at or near to the top of the block, and at least one supporting leg portion extending down from the top portion to terminate at or near to the bottom of the block, at feast those portions of the bottom of the or each leg portion intended to be load- bearing having a load-spreading plate.
Preferably, the side of the block intended to be the inside face is provided with a series of spaced upright battens recessed thereinto.
In an embodiment in which the top portions in the reinforcement underlies the top of the block, an elongate batten is preferably recessed into the block between the top of the block and the top portion of the reinforcement-The elongate batten is desirably spaced nearer the inside face of the block An embodiment of the present invention will now be described, by way of example, with reference to the accompanying schematic drawings in which :- Fig. 1 is an end view of a lintel of the present invention ; Fig. 2 is a perspective view of a reinforcement at one end thereof ; and Fig. 3 is a series of perspective end views of seven different shapes of reinforcement (shown schematically) to be used in a lintel.
Referring to the drawings, a lintel is formed of an elongate block 10 of plastics material foamed or expanded in a mould (not shown) around a shaped reinforcement 12 of similar length The reinforcement 12 is formed of metallic sheet material and has a top portion 14 at or near to the top of the block 10. The top portion 14 is supported by at least one leg portion 16 extending down therefrom to terminate at or near to the bottom of the block 10.
The reinforcement 12 may be of, for example, inverted U-shape, box-shape, T-shape, I-shape, Z-shape, C-shape or reverse C-shape. The sheet material may be indented or plain and perforate or irnperforate It may also be of expanded material.
If the sheet material is plain and imperforate, the surfaces are roughened or are provided with keying means.
In relation to the shapes of reinforcement, such as those of inverted U-shape and T-shape, in which the portions of the bottom of the or each leg portion 16, normally each end portion, is intended to be load-bearing, a load-spreading plate is provided to spread the load and prevent the leg portions 16 cutting through the plastics material. Each load-spreading plate in Figs. 1 and 2 is shown as a shoe 18 of sheet material with tumed-up opposite end portions 20, the shoe 18 being positioned at right angles to the attitude of the axis of the reinforcement.
The side of the block 10 intended to be the inside face and is provided c series of spaced upright battens 22 recessed thereinto to provide an anchorage for use in fitting, for example, curtain rails.
In an embodiment in which the top portion 14 of the reinforcement 12 underlies the top of the block 10, an elongate batten 24 of dove-tail cross-sectional shape is recessed into the block 10 between the top of the block 10 and the top portion 14 of the reinforcement 12. The elongate batten 24 is spaced nearer the inside face of the block 10 whereby to provide an anchorage for beams or flooring boards to be laid thereabove. The battens 22 and 24 are of dove-tail cross-sectional shape, the broader side being positioned innermost.
Fig. 3 shows seven possible shapes for reinforcements 12. In views (b), (c), (d) and (f), the load-spreading plate is a bottom portion 26 of the reinforcement integral with the leg portion 16. In views (a), (e) and (g), the load-spreading plate is the separate shoe 18.
A lintel as described is used in a conventional way.
Variations and modifications can be made without departing from the scope c the invention described above.

Claims (6)

  1. CLAIMS 1. A lintel formed of an elongate block of plastics material foamed or expanded around a shaped reinforcement of similar length, the reinforcement being formed of metallic sheet material, and having a top portion at or near to the top of the block, and at least one supporting leg portion extending down from the top portion to terminate at or near to the bottom of the block, at least those portions of the bottom of the or each leg portion intended to be load-bearing having a load-spreading plate.
  2. 2. A lintel as claimed in Claim 1, wherein the side of the block intended to be the inside face is provided with a series of spaced upright battens recessed thereinto.
  3. 3. A lintel as claimed in Claim 1 or 2, wherein an elongate batten is recessed into the block between the top of the block and the top portion of the reinforcement.
  4. 4. A lintel as claimed in Claim 3, wherein the elongate batten is spaced nearer the inside face of the block.
  5. 5. A lintel as claimed in any one of the preceding claims, wherein each load spreading plate is a shoe of sheet material with turned-up opposite end portions the shoe being positioned at right angles to the attitude of the axis of the reinforcement.
  6. 6. A lintel substantially as hereinbefore described with reference to the accompanying drawings.
GB9824797A 1998-11-12 1998-11-12 Lintels Expired - Fee Related GB2343687B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9824797A GB2343687B (en) 1998-11-12 1998-11-12 Lintels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9824797A GB2343687B (en) 1998-11-12 1998-11-12 Lintels

Publications (3)

Publication Number Publication Date
GB9824797D0 GB9824797D0 (en) 1999-01-06
GB2343687A true GB2343687A (en) 2000-05-17
GB2343687B GB2343687B (en) 2002-09-18

Family

ID=10842321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9824797A Expired - Fee Related GB2343687B (en) 1998-11-12 1998-11-12 Lintels

Country Status (1)

Country Link
GB (1) GB2343687B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2369833A (en) * 2000-11-23 2002-06-12 Keystone Lintels Ltd Reinforced lintel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227262A (en) * 1989-01-19 1990-07-25 Catnic Ltd Lintels: corrosion resisting and/or decorating
GB2287262A (en) * 1994-03-11 1995-09-13 Keystone Lintels Ltd Inserting insulation into lintel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227262A (en) * 1989-01-19 1990-07-25 Catnic Ltd Lintels: corrosion resisting and/or decorating
GB2287262A (en) * 1994-03-11 1995-09-13 Keystone Lintels Ltd Inserting insulation into lintel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2369833A (en) * 2000-11-23 2002-06-12 Keystone Lintels Ltd Reinforced lintel

Also Published As

Publication number Publication date
GB2343687B (en) 2002-09-18
GB9824797D0 (en) 1999-01-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20021218