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
  • E04D3/36—Connecting; Fastening
  • E04D3/361—Connecting; Fastening by specially-profiled marginal portions of the slabs or sheets
  • E04D3/362—Connecting; Fastening by specially-profiled marginal portions of the slabs or sheets by locking the edge of one slab or sheet within the profiled marginal portion of the adjacent slab or sheet, e.g. using separate connecting elements
• • 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 relates to roofing material, particularly roofing material made from sheet metal.
• the object of the present invention is to provide a novel configuration of roofing material of sheet material which is provided in strip form, the strips being arranged, in use, so as to run generally in horizontal directions with the upper strips overlapping the successively lower strips so as to provide a weatherproof roof structure-
• roofing material comprising a web having a first flange which extends from one edge thereof in a first direction and a second flange which extends from the other edge thereof in the opposite direction to the first flange, the arrangement being such that in use a roof is formed from the roofing material with strips of said material extending generally horizontally with the first flange of a relatively low strip underlying and extending towards the web of the next successively uppermost strip, and wherein the second flange of the next uppermost strip has its second flange extending towards the web of the lower strip whereby said first flange of the lower strip and the second flange of the upper strip and adjacent portions of the webs of said strips together define a hollow beam of polygonal cross-section.
• the invention also provides a roofing strip having an elongate web portion with upturned and downturned side flanges at the longitudinal edges of the web, the arrangement being such that the strips can be overlapped to form a roof and the flanges and adjacent portions of the web form hollow beam members for strengthening the strips on the roof.
• the invention also includes a roof made from a plurality of the strips defined above.
• FIGURE 1 is a perspective view of a preferred embodiment of the strip of the invention
• FIGURE 2 is a schematic side view of a roof structure incorporating the strip of the invention
• FIGURE 3 is a cross-sectional view taken along the line 3-3;
• FIGURE 4 is a cross-sectional view taken along the line 4-4.
• the roofing strip 2 of the invention is made from sheet metal such as aluminium, galvanized iron or steel coated with a protective finish.
• the strip comprises a web portion 4, upturned flange 6 and upper leg 8.
• the strip further includes a downwardly extending flange 10 with a lower leg 12.
• At one side of the web 4 of the strip there is formed a first marginal portion 9 which is perpendicular to the adjacent flange 6 and parallel to the upper leg 8.
• a second marginal portion 11 which is perpendicular to the flange 10 and parallel to the lower leg 12.
• the arrangement is such that the marginal portion 9 and the lower leg 12 lie in the same plane.
• FIG. 2 shows the use of the roofing strips to form a roof.
• the lower part of the drawing shows the strips used with a roof having a timber truss 13 whereas the upper part of the drawing shows the use of the strips with a steel truss 15.
• the trusses have top faces indicated at 17 which may extend at an angle to the horizontal depending upon the pitch of the roof, the right hand side (as shown in Figure 2) being higher than the left hand side.
• the drawing shows a first strip 2a, part of a successively lower strip 2b and part of a successively upper strip 2c.
• the lowermost strips In fabricating a roof, the lowermost strips would be affixed first to the trusses and the successively upper strips added so as to form the surface of the roof. It will be seen that the portion 9b of the strip 2b lies flush against the top surface 17 of the truss 13. The leg 6b extends perpendicularly with respect to the top surface 17.
• the leg 6b includes holes 19b through which fixing bolts 21 pass.
• Each fixing bolt 21 is generally U-shaped and its the lower end is threaded.
• the fixing bolts 21 are connected to the timber truss 13 by means of a bracket 23 which has a U-shaped portion 25 and side flanges 27, as best seen in Figure 4.
• the threaded portions of the fixing bolts 21 pass through openings in the side flanges and nuts 29 are tightened so that their free ends 31 bear against the undersides of the side flanges and so clamp the portion 9b into firm contact with the top surface 17 of the truss.
• the nuts 29 are initially left somewhat loose so that the lower leg 12a of the next uppermost strip can be inserted between the free end 31 of the fixing bolt 21 and the adjacent marginal portion 9b until the leg 12a overlies substantially the entire portion 9b. Further, the marginal portion 11a overlies and engages the upper leg 8b. Once the two strips 2a and 2b are in this relative position, the nuts 29 can be tightened so that the strips are firmly locked together.
• the free end 31 of the fixing bolts preferably come into engagement with the leg 12a so as to clamp the position of the strip 2a.
• brackets 23 can be nailed to the trusses 13 so as to hold them in position until the fixing bolts 21 and nuts 29 have been positioned and tightened. This is most easily accomplished by providing holes 31 in the U-shaped portions 25 through which a nails 33 can be driven.
• FIG 2 also shows the use of the roofing strips with a steel truss 15.
• the truss includes a pair of angle irons 35, as best seen in Figure 3.
• the fixing bolts 21 can pass through holes provided directly in the upper flanges of the angle irons 35 and tightened so as to clamp the strips to the truss 15 in a similar manner described with reference to the timber truss 13.
• the interlocking portions of the strips form box beams which possess considerable strength. More particularly, it will be seen that the portions 11a and 9b, flanges 10a, 6b and legs 12a and 8b together form a box beam of rectangular section which strengthens and supports the edges of the webs of the strips.
• the box beam of course extends between adjacent trusses of the roof and thereby eliminates the need for battens which are required in a normal roofing structure.
• Figure 2 also shows a modified arrangement in which a downward leg 37b (shown in broken lines) extends downwardly from the leg 8b.
• the inclusion of downward legs 37 on the strips would increase the strength of the box beams formed at the edges of the webs of the strips.
• the distance between the flanges 6 and 10 is 350 mm
• the widths of the portions 9 and 11 is 25 mm
• the height of the flanges 6 and 10 are 50 m .
• the legs 8 and 12 are somewhat less than 25 mm in length.
• the angle between the web 4 and the marginal portions 9 and 11 is about 10°.
• the strips of the invention can be used to provide an easily assembled and water tight roofing structure. Further the roof is of attractive appearance. Moreover the technique of fixing the strips to the trusses is such that the trusses are not perforated at locations which are exposed to the elements so that the likelihood of water leakage is extremely small.
• the strips could be supplied from a factory in convenient lengths of say 5 or 10 metres. Alternatively a portable rolling apparatus could be used to form the strips on site in very long lengths if required.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Roof Covering Using Slabs Or Stiff Sheets (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3699619

Family Applications (1)

Country Status (2)

Families Citing this family (1)

Family Cites Families (9)

• 1985
  • 1985-12-24 WO PCT/AU1985/000325 patent/WO1986004374A1/en unknown
  • 1985-12-24 EP EP19860900033 patent/EP0208700A1/de not_active Withdrawn

Non-Patent Citations (1)

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