GB2231896A - Purlin - Google Patents

Purlin Download PDF

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Publication number
GB2231896A
GB2231896A GB9009546A GB9009546A GB2231896A GB 2231896 A GB2231896 A GB 2231896A GB 9009546 A GB9009546 A GB 9009546A GB 9009546 A GB9009546 A GB 9009546A GB 2231896 A GB2231896 A GB 2231896A
Authority
GB
United Kingdom
Prior art keywords
angles
purlin
shaped
structural
pressed
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Withdrawn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
GB9009546A
Other versions
GB9009546D0 (en
Inventor
Derek Pugh
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.)
PRECISION METAL FORMING Ltd
Original Assignee
PRECISION METAL FORMING 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 PRECISION METAL FORMING Ltd filed Critical PRECISION METAL FORMING Ltd
Publication of GB9009546D0 publication Critical patent/GB9009546D0/en
Publication of GB2231896A publication Critical patent/GB2231896A/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Withdrawn legal-status Critical Current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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E04C3/07—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
    • 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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
    • 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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
    • 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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0473—U- or C-shaped
    • 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
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0482—Z- or S-shaped

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

Structural bearing members e.g. purlins have angles between adjacent flat webs and additional features e.g. bulges or depressions pressed into these angles at right angles to the planes of the webs, in order to increase structural stiffness of the members concerned.

Description

Improvements in or relating to structural members This invention relates to load-bearing structural members such as beams or purlins, for buildings.
Structural members which act as load-bearing components for sheet-clad buildings are known. These are usually in the form of beams or purlins and are normally of Z-shaped, W-shaped or channel shaped section. They are usually made of rolled steel, galvanised or ungalvanized, coated or painted.
However the angles of such members, under load, tend to act as hinges and to flex under the applied load.
We have now discovered however that if an additional feature is pressed into the angles of such components their structural rigidity can be improved apprec ably.
Thus this invention consists of a structural member for a building, which has load-bearing web areas separated by angles, wherein angles between adjacent web areas have additional features pressed into them at right angles to the plane of the web to increase their structural stiffness.
Preferably the additional feature is a bulge or depression which extends inwardly with respect to the angle which it modifies.
Preferably the structural member is a purlin or side rail.
Preferably the structural member is of general z-shaped or W-shaped section or channel section with uniform or non-uniform configuration.
Preferably the features are pressed into the member during a roll-forming process.
The invention will now be further described by reference to the 5 accompanying Figures of diagrammatic drawing which show by way of Example embodiments of the invention.
Figure 1 a Z-shaped purlin modified according to the invention.
Figure 2 a W-shaped purlin modified according to the invention.
Figure 3 is a detail of one of the angles of Figure 2.
Figure 4 is a detail of an angle of a z-shaped purlin which has been modified according to the invention.
and Figure 5 is a perspective view of a W-section purlin modified according to the invention.
With reference to Figure 1, a generally Z-section purlin has main web areas 1, 2 and 3 with connecting angles 4 and 5 as shown.
According to the present invention each of angles 4 and 5 is modified by the presence of inwardly directed bulges or depressions 4a and 5a in the metal web.
With reference to Figure 2, a generally W-section purlin has main web areas 1, 2, 3, 4, and 5 with connecting angles 6, 7, 8, 9. In accordance with the invention each of these angles is modified by the presence of inwardly directed bulges or depressions 6a, 7a, 8a and 9a in the metal web.
Figure 3 shows a detail of angle 9 of Figure 2 and Figure 4 shows the shape of the bulge pressed into angle 9.
Figure 4 shows a detail of an angle of a Z-shaped purlin with feature 4a pressed into the angle 4.
Figure 5 shows a W-shaped purlin as shown in Figure 2 which has been modified by pressed-in features 6a, 7a, 8a and 9a, the other parts being numbered as for Figure 2.
The material from which the structural member is constructed will normally be cold-rolled steel. The bulges or other features will normally be pressed in during a roll-forming process and therefore no additional metal is involved in the modification to the angles according to the invention. Also the inwardly-directed bulges or depressions may be continuous or intermittent across the width of the member.

Claims (1)

  1. CLAIMS:
    1. A structural member for a building which has load-bearing web areas separated by angles, wherein the angles between adjacent web areas have additional features pressed into them at right angles to the plane of the web to increase their structural stiffness.
    2. A member as claimed in claim 1 wherein the additional feature is a bulge or a depression which extends inwardly with respect to the angle which it modifies.
    3. A member as claimed in claims 1 or 2 wherein the member is a purlin or side-rail.
    4. A member as claimed in claim 3 wherein the purlin or rail is of generally W-shaped, Z-shaped or channel-shaped section.
    6. A member as claimed in claims 1 to 4 which is produced by a roll-forming process.
    7. A structural member for a building substantially as hereinbefore described with reference to Figures 1-5 of the accompanying drawings.
GB9009546A 1989-05-27 1990-04-27 Purlin Withdrawn GB2231896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB898912287A GB8912287D0 (en) 1989-05-27 1989-05-27 Improvements in or relating to structural members

Publications (2)

Publication Number Publication Date
GB9009546D0 GB9009546D0 (en) 1990-06-20
GB2231896A true GB2231896A (en) 1990-11-28

Family

ID=10657510

Family Applications (2)

Application Number Title Priority Date Filing Date
GB898912287A Pending GB8912287D0 (en) 1989-05-27 1989-05-27 Improvements in or relating to structural members
GB9009546A Withdrawn GB2231896A (en) 1989-05-27 1990-04-27 Purlin

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB898912287A Pending GB8912287D0 (en) 1989-05-27 1989-05-27 Improvements in or relating to structural members

Country Status (1)

Country Link
GB (2) GB8912287D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1120508A2 (en) * 2000-01-29 2001-08-01 Fischerwerke Arthur Fischer GmbH & Co. KG Support rail

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2093886A (en) * 1981-03-03 1982-09-08 Anglia Jay Purlin Co Ltd Roof purlin
GB2138861A (en) * 1983-04-29 1984-10-31 Wuppermann Gmbh Theodor Purlin for a sloping roof membrane
GB2174431A (en) * 1985-04-30 1986-11-05 Gunnebo Ab Non-circular tubular fencing post
GB2181467A (en) * 1985-08-24 1987-04-23 Hadley Sections Limited Elongate sections

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2093886A (en) * 1981-03-03 1982-09-08 Anglia Jay Purlin Co Ltd Roof purlin
GB2138861A (en) * 1983-04-29 1984-10-31 Wuppermann Gmbh Theodor Purlin for a sloping roof membrane
GB2174431A (en) * 1985-04-30 1986-11-05 Gunnebo Ab Non-circular tubular fencing post
GB2181467A (en) * 1985-08-24 1987-04-23 Hadley Sections Limited Elongate sections

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1120508A2 (en) * 2000-01-29 2001-08-01 Fischerwerke Arthur Fischer GmbH & Co. KG Support rail
EP1120508A3 (en) * 2000-01-29 2001-10-17 Fischerwerke Arthur Fischer GmbH & Co. KG Support rail

Also Published As

Publication number Publication date
GB8912287D0 (en) 1989-07-12
GB9009546D0 (en) 1990-06-20

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Legal Events

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