EP2090711A1 - Trapezoidal metal roofing sheet - Google Patents

Trapezoidal metal roofing sheet Download PDF

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Publication number
EP2090711A1
EP2090711A1 EP09075047A EP09075047A EP2090711A1 EP 2090711 A1 EP2090711 A1 EP 2090711A1 EP 09075047 A EP09075047 A EP 09075047A EP 09075047 A EP09075047 A EP 09075047A EP 2090711 A1 EP2090711 A1 EP 2090711A1
Authority
EP
European Patent Office
Prior art keywords
flanges
sheet
roofing sheet
layers
metal roofing
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
EP09075047A
Other languages
German (de)
French (fr)
Other versions
EP2090711B1 (en
Inventor
Anders Eriksson
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.)
Plannja AB
Original Assignee
Plannja AB
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 Plannja AB filed Critical Plannja AB
Priority to PL09075047T priority Critical patent/PL2090711T3/en
Publication of EP2090711A1 publication Critical patent/EP2090711A1/en
Application granted granted Critical
Publication of EP2090711B1 publication Critical patent/EP2090711B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/24—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like
    • E04D3/30—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of metal

Definitions

  • This invention refers to a trapezoidal metal roofing sheet with upper and lower flanges and intermediate webs.
  • the figures 1 and 2 show a roofing sheet of metal which has a trapezoidal profile. It has upper flanges 11, lower flanges 12 and intermediate webs (sides) 13,14. The webs have two steps 15,16 serving as reinforcements. The upper flanges as well as the lower ones have two side portions 17,18 where the sheet is folded into three layers. These portions with three layers reinforce the flanges.
  • the flanges may have a central groove 20, which serves as an additional reinforcement of the flanges.
  • Thinner sheet can be used due to the reinforcement of the flanges, which reduces the roofing weight per square meter. This reduces the cost and makes the roofing operation easier.
  • the roofing sheet is roll formed and figure 3 shows a suitable intermediate step in a possible manufacturing process.
  • the side portions 17,18 are folded as shown before the roll forming continues to shape the entire profile.
  • the roll forming may be carried out by first starting the shaping of a central profile and then sequentially starting the shaping of new side portions and new profiles from the central profile.
  • the reinforcement of the flanges may have other appearances although the illustrated design is preferred. It is not necessary to have the central groove 20 and it is not necessary to have two narrow reinforcements on each flange, but a single centrally placed wider reinforcement can be used. Reinforcement in the form of three layers is preferred but more layers can be used. It is also possible to reinforce some but not all of the flanges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

A roofing sheet of metal has a trapezoidal profile with upper and lower flanges (11,12) and intermediate webs (13,14). The flanges (11,12) have a central portion (20) of single layer sheet metal and on both sides thereof, the sheet metal is folded into three layers.

Description

  • This invention refers to a trapezoidal metal roofing sheet with upper and lower flanges and intermediate webs.
    • Object of invention and brief description of the invention
  • It is an object of the invention to provide for a more efficient utilisation of the material. This is possible when at least portions of the flanges have sheet in three layers, which makes it possible to use thinner sheet material.
    • Brief description of the drawings
    • Figure 1 is a transverse section of a roofing sheet of metal shown as an example of the invention.
    • Figure 2 is an enlargement of a portion of figure 1.
    • Figure 3 is a portion of the roofing sheet of figure 1 during its manufacturing.
    Description of the illustrated example of the invention
  • The figures 1 and 2 show a roofing sheet of metal which has a trapezoidal profile. It has upper flanges 11, lower flanges 12 and intermediate webs (sides) 13,14. The webs have two steps 15,16 serving as reinforcements. The upper flanges as well as the lower ones have two side portions 17,18 where the sheet is folded into three layers. These portions with three layers reinforce the flanges. The flanges may have a central groove 20, which serves as an additional reinforcement of the flanges.
  • Thinner sheet can be used due to the reinforcement of the flanges, which reduces the roofing weight per square meter. This reduces the cost and makes the roofing operation easier.
  • The roofing sheet is roll formed and figure 3 shows a suitable intermediate step in a possible manufacturing process. At first, the side portions 17,18 are folded as shown before the roll forming continues to shape the entire profile. The roll forming may be carried out by first starting the shaping of a central profile and then sequentially starting the shaping of new side portions and new profiles from the central profile.
  • The reinforcement of the flanges may have other appearances although the illustrated design is preferred. It is not necessary to have the central groove 20 and it is not necessary to have two narrow reinforcements on each flange, but a single centrally placed wider reinforcement can be used. Reinforcement in the form of three layers is preferred but more layers can be used. It is also possible to reinforce some but not all of the flanges.

Claims (3)

  1. Trapezoidal metal roofing sheet with upper and lower flanges (11,12) and intermediate webs (13,14),
    characterised in that at least portions (17,18) of the flanges has sheet in three layers.
  2. Roofing sheet according to claim 1, characterised in that the flanges (11,12) have a central portion (20) with a single sheet layer and on both sides thereof sheet in three layers.
  3. Roofing sheet according to claim 2, characterised in that the flanges (11,12) have a central groove in the central portion (20).
EP09075047.2A 2008-02-13 2009-02-03 Trapezoidal metal roofing sheet Active EP2090711B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09075047T PL2090711T3 (en) 2008-02-13 2009-02-03 Trapezoidal metal roofing sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0800318A SE532580C2 (en) 2008-02-13 2008-02-13 Trap profiled roofing sheet

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
SE0800318 Previously-Filed-Application 2008-02-13

Publications (2)

Publication Number Publication Date
EP2090711A1 true EP2090711A1 (en) 2009-08-19
EP2090711B1 EP2090711B1 (en) 2014-01-29

Family

ID=40809849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09075047.2A Active EP2090711B1 (en) 2008-02-13 2009-02-03 Trapezoidal metal roofing sheet

Country Status (4)

Country Link
EP (1) EP2090711B1 (en)
DK (1) DK2090711T5 (en)
PL (1) PL2090711T3 (en)
SE (1) SE532580C2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB978142A (en) * 1963-02-22 1964-12-16 Ircom S P A Improvements in or relating to structural members
US3660482A (en) * 1968-05-28 1972-05-02 Eduardo Delfin Elizalde Joint for sheet elements
US3760549A (en) * 1970-11-21 1973-09-25 W Silberkuhl Construction element
US4453364A (en) * 1980-05-27 1984-06-12 Ting Raymond M L Corrugated steel decking section

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB978142A (en) * 1963-02-22 1964-12-16 Ircom S P A Improvements in or relating to structural members
US3660482A (en) * 1968-05-28 1972-05-02 Eduardo Delfin Elizalde Joint for sheet elements
US3760549A (en) * 1970-11-21 1973-09-25 W Silberkuhl Construction element
US4453364A (en) * 1980-05-27 1984-06-12 Ting Raymond M L Corrugated steel decking section

Also Published As

Publication number Publication date
SE0800318L (en) 2009-08-14
SE532580C2 (en) 2010-02-23
DK2090711T5 (en) 2014-04-07
DK2090711T3 (en) 2014-02-17
PL2090711T3 (en) 2014-05-30
EP2090711B1 (en) 2014-01-29

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