WO2013134058A1 - Bracing element - Google Patents
Bracing element Download PDFInfo
- Publication number
- WO2013134058A1 WO2013134058A1 PCT/US2013/028549 US2013028549W WO2013134058A1 WO 2013134058 A1 WO2013134058 A1 WO 2013134058A1 US 2013028549 W US2013028549 W US 2013028549W WO 2013134058 A1 WO2013134058 A1 WO 2013134058A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- edge
- bracing element
- bracing
- flange
- timber
- Prior art date
Links
- 239000000463 material Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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
- E04C3/291—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures with apertured web
-
- 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
- E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
- E04C3/18—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with metal or other reinforcements or tensioning members
-
- 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
- E04C3/292—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being wood and metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B15/00—Nails; Staples
- F16B15/0023—Nail plates
- F16B15/003—Nail plates with teeth cut out from the material of the plate
- F16B15/0038—Nail plates with teeth cut out from the material of the plate only on the perimeter of the plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B15/00—Nails; Staples
- F16B15/0023—Nail plates
- F16B15/003—Nail plates with teeth cut out from the material of the plate
- F16B15/0046—Nail plates with teeth cut out from the material of the plate from the body of the plate
Definitions
- the present invention relates to a bracing element for use in the web of a joist or truss.
- the invention relates to a bracing element capable of improved attachment to a timber chord in a joist or truss.
- the invention further relates to a joist comprising one or more bracing elements according to the invention.
- a bracing element may be in any suitable shape l-shaped, V-shaped, W- shaped L-shaped, for example.
- the bracing element comprises at least one connector plate and at least one elongate spacing portion.
- the bracing element comprises at least two connector plates connected and spaced apart from one another by the elongate spacing portion.
- Bracing elements are typically used to form a web in a joist or truss.
- a joist is formed by two parallel and spaced apart chords with at least one bracing element connecting the two chords and being attached to each of the chords.
- each chord is formed of timber and comprises upper and lower faces and first and second side surfaces connecting the upper and lower faces.
- the first and second chords are spaced apart from one another in parallel relation with the lower surface of the first chord facing the upper surface of the second chord.
- a first connector plate of a bracing element is attached to the upper chord and a second connector plate of the bracing element is attached to the lower chord.
- the first and second connector plates may be attached to the first side surface of the upper and lower chords respectively.
- the first and second connector plates of the, or, a further, bracing element may be attached to the second side surface of the upper and lower chords respectively.
- the joist may comprise a plurality of bracing elements forming the web of the joist.
- the joist may comprise bracing elements having one or more different shapes.
- the joist may comprise bracing elements attached at one side of the timber chords, alternatively, the joist may comprise bracing elements attached at both sides of the timber chords. In arrangements where the bracing elements are attached at both sides of the timber chords, the bracing elements may be in parallel opposition to one another or may be staggered in longitudinal relation to one another.
- the connector plates may comprise punched nail holes and/or fastener apertures through which any suitable fastener may be embedded into the surface of the timber element.
- the present invention provides a bracing element comprising at least two connector plates connected to and spaced apart from one another by at least one elongate spacing portion, at least one edge of the bracing element comprising a serrated edge configured to be locateable into the surface of a timber element.
- the serrated edge is located on the elongate spacing portion.
- the serrated edge is located on at least one of the connector plates. In alternative or additional embodiments, each connector plate comprises at least one serrated edge.
- the serrated edge is provided on a flange. More specifically, the flange may depend from an edge of the bracing element. In such embodiments, the serrated edge is located on the outer edge of the flange, the outer edge being opposed to the edge depending from the bracing element. In this way, the serrated edge is located so as to be locateable into a timber element such as a timber chord or the like. In certain embodiments the flange depends from an edge of the elongate spacing element. Alternatively or, in addition, the flange depends from an edge of at least one of the connector plates.
- the flange comprising the serrated edge depends from an edge of a connector plate.
- the flange comprising the serrated edge may depend from one or more edges of a connector plate.
- the flange may be continuous or otherwise may be discontinuous along the one or more edges.
- the connector plate comprises a substantially rectangular plate. More specifically, the connector plate may comprise a substantially rectangular plate comprising a heel portion connected to the elongate spacing portion. In preferred arrangements, the elongate spacing portion extends diagonally from the heel portion of the connector plate. More specifically, the elongate spacing portion extends diagonally from the heel portion of one connector plate to the heel portion of a further connector plate.
- the flange comprising the serrated edge depends from the lowermost outer edge of the plate.
- the flange may, in certain embodiments, extend around the corner between the lowermost edge and the heel portion of the plate such that the serrated edge depends from the lowermost outer edge of the plate and the rearmost outer edge of the connector plate.
- a flange may depend from the end edge of the connector plate.
- a flange may depend from the uppermost edge of the connector plate.
- the flange having the serrated edge may be continuous or may otherwise be discontinuous about one or more edges of the, or each, connector plate. In certain embodiments, the entire edge of the flange may be serrated. Alternatively, one or more portions of the edge of the flange may be serrated. It will be understood that the, or each, serrated edge is/are located on the bracing element such that it/they may be embedded into a timber element. More specifically, when the bracing element is in position against a timber chord, or chords, in order to form the web of a joist, for example, the, or each, serrated edge is/are located on the bracing element such that it/they may be embedded into the, or each, timber chord.
- the bracing element may be formed from any suitable material.
- the bracing element is a metal element. More specifically, the bracing element may be formed of galvanised steel or aluminium or the like.
- the bracing element is preferably a metal bracing element for forming a metal web of a metal web joist.
- the bracing element comprises two connector plates spaced apart and connected to one another by an elongate spacing portion, each connector plate comprising at least one flange having a serrated outer edge depending from at least one outer edge of the connector plate(s).
- the bracing element may have a serrated flange depending from an uppermost edge and a serrated flange depending from a lowermost edge. The, or each, serrated flange may extend into the heel portion of the uppermost and/or the lowermost connector plate.
- the bracing element may be substantially V shaped, l-shaped or W- shaped. Alternatively, the bracing element may be substantially L-shaped. In certain embodiments, the bracing element is initially formed as a pair of bracing elements. In these embodiments, each bracing element comprises a pair of connector plates, spaced apart by an elongate spacing element. One of the pair of connector plates of a first bracing element of the pair is initially attached to one of the pair of connector plates of the other bracing element of the pair. The pair of bracing elements is separable along an attachment line between the attached connector plates. The bracing element may have a V-shaped profile. In such embodiments, the ends of the V-shape each have a connector plate depending
- the base section of the V-shape is preferably a flattened section made up of two connector plates joined together end to end.
- the V-shaped bracing element may be formed of two separable bracing elements initially joined at one of their connector plates in end to end relation.
- the lowermost and/or uppermost edges of the bracing element(s) may comprise a flange depending therefrom, the flange(s) having a serrated outer edge.
- Each flange may be upstanding substantially perpendicularly from the adjacent surface of the bracing element. More specifically, the, or each, flange may be formed by folding the material of the bracing element at an end thereof.
- the bracing element comprises at least two connector plates.
- the bracing element comprises two connector plates, one at each end of the elongate spacing portion.
- the, or each, connector plate is a nail plate.
- the, or each, nail plate may comprise a plurality of integral nail fasteners pressed from the material of the, or each, nail plate.
- Alternative or additional fastener apertures may be provided in the, or each, connector plate.
- Known fasteners such as nails, screws or staples or the like may be located in the fastener apertures in order to facilitate attachment of the bracing element to the timber element.
- the bracing element further comprises at least one edge flange depending from an outer edge thereof. More specifically, the at least one edge flange may depend from an outer edge of one or more of the elongate spacing portion and/or one or more of the connector plates. In certain embodiments, a first edge flange depends from a first outer edge of the elongate spacing portion.
- the first edge flange in various embodiments, extends from an end of the first outer edge of the elongate portion along a first, uppermost outer edge of the lowermost connector plate.
- the first edge flange may be continuous along the entire length of the outer edge of the first outer edge of the elongate portion to the end of the first outer edge of the lowermost connector plate.
- the first edge flange may be continuous along the entire length of the first outer edge of the elongate spacing portion and the first outer edge of the lowermost connector plate.
- the first edge flange may be discontinuous along the length of the first outer edge of the elongate spacing portion and the first outer edge of the lowermost connector plate.
- the discontinuity in the first edge flange may be located at the join between the first outer edge of the elongate spacing portion and the first outer edge of the connector plate.
- the bracing element further comprises a second edge flange depending from a further outer edge thereof. More specifically, the second edge flange may depend from another outer edge of one or more of the elongate spacing portion and/or one or more of the connector plates.
- the second edge flange depends from a second outer edge of the elongate spacing portion.
- the second edge flange in various embodiments, extends from an end of the second outer edge of the elongate portion along a first, lowermost outer edge of the uppermost connector plate.
- the second edge flange may be continuous along the entire length of the second outer edge of the elongate portion to the end of the first, lowermost outer edge of the uppermost connector plate.
- the second edge flange may be continuous along the entire length of the second outer edge of the elongate spacing portion and the first, lowermost outer edge of the uppermost connector plate.
- the second edge flange may be discontinuous along the length of the second outer edge of the elongate spacing portion and the first, lowermost outer edge of the uppermost connector plate.
- the discontinuity in the second edge flange may be located at the join between the second outer edge of the elongate spacing portion and the first, lowermost outer edge of the uppermost connector plate.
- the first and, if present, the second edge flanges provide additional strength to the bracing element.
- the flange may comprise a locating lug. More specifically, the locating lug(s) is/are configured to bear onto a surface of a timber chord in use of the bracing element. More specifically, the locating lug(s) is/are located at the end of the, or each, flange depending from an outer edge of the connector plate.
- The, or each, edge flange is configured such that a portion of the, or each, edge flange is operable to bear onto an upper or a lower surface of a timber chord when the bracing element is positioned between two parallel timber chords in a joist.
- the portion of the or each edge flange depending from an outer edge of a connector plate is configured such that that portion of the or each edge flange is operable to bear onto an upper or a lower surface of a timber chord when the bracing element is positioned between two parallel timber chords in a joist.
- the present invention provides a joist comprising first and second timber chords in spaced apart parallel relation and at least one bracing element attached to the first and the second timber chords at a side surface thereof, the bracing element comprising at least one serrated edge configured to be locateable into the side surface of at least one of the first and the second timber chords.
- the, or each, bracing element is according to the first aspect of the present invention.
- the at least one serrated edge is preferably embedded into the side surface of at least one of the timber chords.
- the bracing element comprises a plurality of serrated edges with at least one serrated edge being locateable into a first timber chord and at least one serrated edge being locateable into a second timber chord.
- the edge(s) may be pressed or driven into the or each side surface of the timber chord(s). In this way, the bracing element is improved in its resistance to slipping or detachment from the, or each, timber chord in comparison to a bracing element without the serrated edge(s).
- the web of the joist or truss may be formed of a plurality of bracing elements. Each of the plurality of bracing elements is attached to the first and the second timber chords with adjacent bracing elements being longitudinally spaced along the length of the timber chords.
- a plurality of bracing elements is attached at a first side surface of the first and the second timber chords. In alternative or, in additional, embodiments, a plurality of bracing elements is attached at a second side surface of the first and the second timber chords.
- first and second pluralities of bracing elements may be in parallel or,
- the joist comprises a plurality of bracing elements, at least one of which bracing elements is in accordance with the first aspect of the invention.
- the joist comprises a plurality of bracing elements each according to the first aspect of the present invention, each bracing element being attached to the upper and lower chords of the joist so as to form a web.
- the plurality of bracing elements are each and all attached to an outer side surface of the upper and the lower chords of the joist.
- each of the plurality of bracing elements is attached to an inner side surface of the upper and the lower chords of the joist.
- a first pair of bracing elements is attached to an inner side surface of the upper and the lower chords of the joist and a second pair of bracing elements is attached to an outer side surface of the upper and the lower chords of the joist.
- the first and the second pair of bracing elements may be staggered along the length of the joist such that there bracing elements do not overlap.
- the first and the second pair of bracing elements may be located at opposing side surfaces of the chords of the joist at the same longitudinal position along the joist.
- the joist may comprise opposing bracing elements positioned on either side surface of the chords of the joist.
- the invention provides a structure comprising a plurality of joists according to the second aspect of the invention.
- the structure may be a floor, roof or other structure in which joists are commonly used.
- the invention provides a sheet metal blank for forming a bracing element of the first aspect of the invention.
- FIG. 1 a and 1 b depict a bracing element according to an embodiment of the first aspect of the present invention
- Figure 2 depicts a partial schematic representation of a joist according to an embodiment of the second aspect of the present invention
- Figure 3 depicts a bracing element according to a further embodiment of the first aspect of the present invention.
- Figure 4 depicts a bracing element according to an alternative
- FIG. 5 shows a partial view of a bracing element according to a yet further alternative embodiment of the first aspect of the present invention.
- Figures 1 a and 1 b depict a bracing element 1 according to an embodiment of the first aspect of the invention.
- the bracing element 1 comprises an elongate spacing portion 2, extending between two nail plates 3.
- Nail plates for attaching bracing elements to the timber chords of joists are known in the art and are commonly used to attach metal bracing elements to timber chords. It will, however, be apparent that alternative known attachment means suitable for attaching a bracing element to a timber joist, such as nails, screws, staples and the like, may be employed in the invention.
- nail plates 3 comprise a sheet-like portion or plate, in which a number of teeth 5 are formed by pressing or stamping small portions of material from the plate 3, to form teeth 5 upstanding from the rear surface 3b of each nail plate 3.
- Figure 1 b shows the rear surface 1 b of the bracing element 1 and first and second edge flanges 6 depending from opposing outer edges 15 of the bracing element 1 .
- the edge flanges 6 are upstanding from the plane of the rear surface 1 b of the bracing element 1 at an angle of approximately 90 degrees thereto. Edge flanges 6 provide additional strength to the bracing element 1 , which prevents buckling of the bracing element under compressive loads and/or torsional forces.
- Each edge flange 6 extends along the elongate spacing portion 2 from an outer edge 7 of one nail plate 3, to an inner edge 8 of another nail plate 3.
- the inner edge 7 is located at the heel of nail plate 3.
- the heel portion of each nail plate 3 adjoins the elongate spacing portion 2 of the bracing element 1 .
- each edge flange 6 terminates in a locating lug 9. Locating lugs 9 assist in locating and maintaining correct positioning the bracing elements 1 on the chords 1 1 , 12, as shown in Figure 2.
- the edge flange 6 may extend discontinuously along only a portion of the edge of the bracing element.
- each edge flange 6 Adjacent the inner edge 8 of each nail plate 3, each edge flange 6 terminates in a curved edge 16, which in use, bears onto an lower face 1 1 c, or upper face 12c of a timber chord in a truss (see Figure 2).
- each nail plate 3 comprises a flange 3' depending from an outer edge thereof.
- Flange 3' depends at right angles from the adjacent nail plate surface.
- Flange 3' has a serrated edge 20 located and arranged such that it can be pressed into the surface of a timber chord (not shown).
- a joist 10 comprising two bracing elements 1 at each side of a pair of parallel timber chords 1 1 , 12 is illustrated in Figure 2.
- Each bracing element 1 extends between an upper chord 1 1 and a lower chord 12.
- Opposing lower and upper faces 1 1 c, 12c of the timber chords 1 1 , 12 are held substantially parallel to, and facing one another. In use, the opposing lower and upper faces 1 1 c, 12c are substantially horizontal and the side faces 17 of the timber chords 1 1 , 12 are substantially vertical.
- a bracing element 1 is attached to the timber chords 1 1 , 12 by pressing nail plates 3 and serrated edges 20 (see Figure 1 ) into respective side faces 17 of the chords such that teeth 5 and the serrated edge 20 penetrate the timber and secure the bracing element 1 in position.
- Locating lugs 9 are positioned such that in use, each lug 9 rests against a lower or an upper face 1 1 c, 12c of one of the chords.
- the serrated edge 20 on flange 3' provides additional strength and resistance to movement of the bracing element in the joist, both during manufacture and in use.
- the serrated flange penetrates the surface of a timber chord, thereby fixing the bracing element at the correct position.
- Bracing element 1 ' comprises two nail plates 30 spaced apart and connected together by elongate spacing portion 67.
- the upper nail plate 30 comprises an outer edge 64 from which depends an edge flange 61 having a serrated outer edge.
- the edge flange 61 depends from outer edge 64 at an angle of approximately 90 degrees.
- the edge flange 61 extends rearwardly of the bracing element 60.
- the lower nail plate 30 comprises a lower edge 68 from which depends a further edge flange 62 having a serrated outer edge.
- the edge flange 62 depends from lower edge 68 at an angle of approximately 90 degrees.
- edge flange 62 extends rearwardly of the bracing element 1 '.
- serrated outer edge of edge flanges 61 , 62 are embedded into the upper and lower chords respectively of a joist to strengthen to attachment of nail plates 30 to the chords of the joist.
- edge flanges 61 , 62 The actual configuration of the serrations provided on the edge flanges 61 , 62 is inessential to the invention.
- the serrations must be capable of penetrating the timber chord of a joist in order to embed therein.
- any or all of the edges of the nail plates 30 may having a serrated edge flange depending from one or more edges thereof.
- the elongate spacing portion 67 of bracing element 1 ' comprises opposing outer edges 65a/b and 66a/b from which an edge flange 60 depends.
- the edge flange further strengthens the bracing element 1 '.
- the bracing element 101 is of the V-shaped type and comprises four nail plates 103. In this embodiment, the bracing element 101 is of the V-shaped type and comprises four nail plates 103.
- two nail plates 103a and 103d are attachable to a lower chord 12 (not shown) and spaced apart from one another.
- the other nail plates 103b and 103c are attachable to an upper chord 1 1 (not shown) adjacent one another.
- the nail plates 103 may be joined to, or formed integrally with, one another.
- the V-shaped bracing element may be separable at the nail plates103b, 103c to form two bracing elements of the l-shaped type.
- the bracing element 101 differs from bracing elements 1 and 1 ' in that the nail plates 103 have fastener apertures 105 in place of nails.
- the bracing element 101 may, alternatively, have nail plates 3 and teeth 5 as shown in Figures 1 , 2 and 3. It will be readily understood that in a yet further arrangement, the bracing element may be provided with both fastener apertures and teeth on the nail plate(s) thereof.
- the fastener apertures 105 are configured to receive any appropriate fastener such as, for example, screws, nails, staples or the like.
- the bracing element 101 of Figure 4 is, initially, a V-shaped bracing element, comprising two separable bracing elements 101 a and 101 b, each comprising an elongate spacing portion 102a, 102b and two connector plates 103a, 103b, 103c, 103d.
- each connector plate 103a, 103b, 103c, 103d comprises an edge flange 162a, 162b, 162c, 162d with a serrated outer edge.
- the serrated outer edge of each flange may be embedded into a timber chord during the manufacture of a joist using the bracing element of the present invention.
- the embedded flanges 162a, 162b, 162c, 162d increase the stability of the joist and, in particular, resist slipping of the bracing element once same is in position on the timber chord.
- the flanges 162a, 162b, 162c, 162d each end at a heel portion 1 15ac, 1 15bc, 1 15cc, 1 15dc of the connector plates 103a, 103b, 103c, 103d of the bracing element 101 .
- bracing element 101 may be used as a single, V-shaped bracing element or may be separated between connector plates 103b and 103c to form two separate bracing elements 101 a and 101 b.
- ribs 165a and 165b are embossed in the material of elongate spacing portions 102a and 102b and provide additional strength to the bracing element 101 .
- the bracing element may be formed as a substantially L-shaped or W-shaped bracing element, or any other bracing element shapes known in the field.
- bracing elements may also be separable into component bracing element s such as V-shaped and/or l-shaped bracing elements.
- the bracing element 1 , 1 ', 101 may be formed by folding, bending, stamping, punching and/or pressing operations. In manufacture, the bracing element 1 , 1 ', 101 may be initially formed as a sheet metal blank, which is subsequently punched and folded into the desired configuration of the bracing element 1 , 1 ', 101 .
- the bracing element 1 , 1 ', 101 is preferably formed of a galvanised steel material.
- Figure 5 depicts a partial rear view of a bracing element 201 .
- the elongate spacing portion 202 of bracing element 201 adjoins a connector plate 203.
- Elongate spacing portion 202 is formed integrally with the connector plate 203 from a single sheet of galvanised steel.
- the elongate spacing portion 202 comprises first and second edge flanges 206.
- the first edge flange 206a extends the length of the edge of the elongate spacing portion 202 along the upper edge of connector plate 203 to an outer edge 207 of connector plate 203.
- the first edge flange 206a has a locating lug 209 proximate the outer edge 207.
- the second edge flange 206b extends the length of the edge of the elongate spacing portion 202 to the heel portion of the connector plate 203 at an inner edge 208 of connector plate 203.
- Connector plate 203 comprises fastener apertures 205 for receiving any suitable fastener such as nails, screws, staples or the like.
- Flange 261 depends substantially perpendicularly from the lower edge 268 of connector plate 203.
- the outermost edge of flange 261 is serrated in order that the flange may be embedded into a timber chord of a joist.
- Flange 261 extends from the inner edge 208 to the outer edge 207 of the connector plate 203.
- Figure 5 also comprises a rib 265 formed in the elongate spacing portion 202.
- Rib 265 may be formed by embossing, for example, and acts to strengthen the elongate spacing portion 202.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention relates to a bracing element comprising at least two connector plates connected to and spaced apart from one another by at least one elongate spacing portion, at least one edge of the bracing element comprising a serrated edge configured to be locateable into the surface of a timber element. The invention further relates to a joist comprising at least one bracing element according to the invention.
Description
Bracing Element
The present invention relates to a bracing element for use in the web of a joist or truss. In particular, though not exclusively, the invention relates to a bracing element capable of improved attachment to a timber chord in a joist or truss. The invention further relates to a joist comprising one or more bracing elements according to the invention.
A bracing element may be in any suitable shape l-shaped, V-shaped, W- shaped L-shaped, for example. Typically, the bracing element comprises at least one connector plate and at least one elongate spacing portion. Most typically, the bracing element comprises at least two connector plates connected and spaced apart from one another by the elongate spacing portion.
Bracing elements are typically used to form a web in a joist or truss.
Particularly, a joist is formed by two parallel and spaced apart chords with at least one bracing element connecting the two chords and being attached to each of the chords. Typically, each chord is formed of timber and comprises upper and lower faces and first and second side surfaces connecting the upper and lower faces. The first and second chords are spaced apart from one another in parallel relation with the lower surface of the first chord facing the upper surface of the second chord. In forming the web of a joist, a first connector plate of a bracing element is attached to the upper chord and a second connector plate of the bracing element is attached to the lower chord. The first and second connector plates may be attached to the first side surface of the upper and lower chords respectively. Alternatively or, in addition, the first and second
connector plates of the, or, a further, bracing element, may be attached to the second side surface of the upper and lower chords respectively.
The joist may comprise a plurality of bracing elements forming the web of the joist. The joist may comprise bracing elements having one or more different shapes. The joist may comprise bracing elements attached at one side of the timber chords, alternatively, the joist may comprise bracing elements attached at both sides of the timber chords. In arrangements where the bracing elements are attached at both sides of the timber chords, the bracing elements may be in parallel opposition to one another or may be staggered in longitudinal relation to one another.
In known bracing elements, attachment to a timber element, such as a timber chord for example, is primarily facilitated by the connector plates. The connector plates may comprise punched nail holes and/or fastener apertures through which any suitable fastener may be embedded into the surface of the timber element.
Problems may arise when forces are applied to the bracing element either during manufacture, when a bracing element is attached to the timber chords or, otherwise, when the joist or truss is in position in a structure.
Slipping of the connector plates relative to the timber chords causes tearing of the material of the timber chord(s) and may course the bracing element to distort or even fail completely.
It is an aim of the present invention to provide an improved bracing element.
It is a further aim of the present invention to overcome one or more of the disadvantages of the prior art.
In a first aspect, the present invention provides a bracing element comprising at least two connector plates connected to and spaced apart from one another by at least one elongate spacing portion, at least one edge of the bracing element comprising a serrated edge configured to be locateable into the surface of a timber element. In certain embodiments, the serrated edge is located on the elongate spacing portion.
In alternative or additional embodiments, the serrated edge is located on at least one of the connector plates. In alternative or additional embodiments, each connector plate comprises at least one serrated edge.
In certain embodiments the serrated edge is provided on a flange. More specifically, the flange may depend from an edge of the bracing element. In such embodiments, the serrated edge is located on the outer edge of the flange, the outer edge being opposed to the edge depending from the bracing element. In this way, the serrated edge is located so as to be locateable into a timber element such as a timber chord or the like. In certain embodiments the flange depends from an edge of the elongate spacing element. Alternatively or, in addition, the flange depends from an edge of at least one of the connector plates.
In preferred embodiments, the flange comprising the serrated edge depends from an edge of a connector plate. The flange comprising the
serrated edge may depend from one or more edges of a connector plate. In such embodiments, the flange may be continuous or otherwise may be discontinuous along the one or more edges. In certain embodiments, the connector plate comprises a substantially rectangular plate. More specifically, the connector plate may comprise a substantially rectangular plate comprising a heel portion connected to the elongate spacing portion. In preferred arrangements, the elongate spacing portion extends diagonally from the heel portion of the connector plate. More specifically, the elongate spacing portion extends diagonally from the heel portion of one connector plate to the heel portion of a further connector plate.
In embodiments, wherein the, or each, connector plate comprises a heel portion, it is preferred that the flange comprising the serrated edge depends from the lowermost outer edge of the plate. The flange may, in certain embodiments, extend around the corner between the lowermost edge and the heel portion of the plate such that the serrated edge depends from the lowermost outer edge of the plate and the rearmost outer edge of the connector plate. Alternatively or, in addition, a flange may depend from the end edge of the connector plate.
Alternatively or, in addition, a flange may depend from the uppermost edge of the connector plate.
In certain embodiments, the flange having the serrated edge may be continuous or may otherwise be discontinuous about one or more edges of the, or each, connector plate. In certain embodiments, the entire edge of the flange may be serrated.
Alternatively, one or more portions of the edge of the flange may be serrated. It will be understood that the, or each, serrated edge is/are located on the bracing element such that it/they may be embedded into a timber element. More specifically, when the bracing element is in position against a timber chord, or chords, in order to form the web of a joist, for example, the, or each, serrated edge is/are located on the bracing element such that it/they may be embedded into the, or each, timber chord.
The bracing element may be formed from any suitable material. In preferred embodiments, the bracing element is a metal element. More specifically, the bracing element may be formed of galvanised steel or aluminium or the like. The bracing element is preferably a metal bracing element for forming a metal web of a metal web joist.
In certain arrangements, the bracing element comprises two connector plates spaced apart and connected to one another by an elongate spacing portion, each connector plate comprising at least one flange having a serrated outer edge depending from at least one outer edge of the connector plate(s). In such arrangements, the bracing element may have a serrated flange depending from an uppermost edge and a serrated flange depending from a lowermost edge. The, or each, serrated flange may extend into the heel portion of the uppermost and/or the lowermost connector plate.
The bracing element may be substantially V shaped, l-shaped or W- shaped. Alternatively, the bracing element may be substantially L-shaped.
In certain embodiments, the bracing element is initially formed as a pair of bracing elements. In these embodiments, each bracing element comprises a pair of connector plates, spaced apart by an elongate spacing element. One of the pair of connector plates of a first bracing element of the pair is initially attached to one of the pair of connector plates of the other bracing element of the pair. The pair of bracing elements is separable along an attachment line between the attached connector plates. The bracing element may have a V-shaped profile. In such embodiments, the ends of the V-shape each have a connector plate depending
therefrom. The base section of the V-shape is preferably a flattened section made up of two connector plates joined together end to end. The V-shaped bracing element may be formed of two separable bracing elements initially joined at one of their connector plates in end to end relation. In these embodiments, the lowermost and/or uppermost edges of the bracing element(s) may comprise a flange depending therefrom, the flange(s) having a serrated outer edge. Each flange may be upstanding substantially perpendicularly from the adjacent surface of the bracing element. More specifically, the, or each, flange may be formed by folding the material of the bracing element at an end thereof. In certain embodiments, the bracing element comprises at least two connector plates. In preferred embodiments, the bracing element comprises two connector plates, one at each end of the elongate spacing portion.
In various embodiments, the, or each, connector plate is a nail plate.
More specifically, the, or each, nail plate may comprise a plurality of integral nail fasteners pressed from the material of the, or each, nail plate. Alternative or additional fastener apertures may be provided in the, or each, connector plate. Known fasteners such as nails, screws or staples or the like may be located in the fastener apertures in order to facilitate attachment of the bracing element to the timber element. In embodiments, the bracing element further comprises at least one edge flange depending from an outer edge thereof. More specifically, the at least one edge flange may depend from an outer edge of one or more of the elongate spacing portion and/or one or more of the connector plates. In certain embodiments, a first edge flange depends from a first outer edge of the elongate spacing portion. The first edge flange, in various embodiments, extends from an end of the first outer edge of the elongate portion along a first, uppermost outer edge of the lowermost connector plate. The first edge flange may be continuous along the entire length of the outer edge of the first outer edge of the elongate portion to the end of the first outer edge of the lowermost connector plate. The first edge flange may be continuous along the entire length of the first outer edge of the elongate spacing portion and the first outer edge of the lowermost connector plate. Alternatively, the first edge flange may be discontinuous along the length of the first outer edge of the elongate spacing portion and the first outer edge of the lowermost connector plate. In exemplary embodiments, the discontinuity in the first edge flange may be located at the join between the first outer edge of the elongate spacing portion and the first outer edge of the connector plate.
Alternatively or, in addition, the bracing element further comprises a second edge flange depending from a further outer edge thereof. More specifically, the second edge flange may depend from another outer edge of one or more of the elongate spacing portion and/or one or more of the connector plates.
In certain embodiments, the second edge flange depends from a second outer edge of the elongate spacing portion. The second edge flange, in various embodiments, extends from an end of the second outer edge of the elongate portion along a first, lowermost outer edge of the uppermost connector plate. The second edge flange may be continuous along the entire length of the second outer edge of the elongate portion to the end of the first, lowermost outer edge of the uppermost connector plate. The second edge flange may be continuous along the entire length of the second outer edge of the elongate spacing portion and the first, lowermost outer edge of the uppermost connector plate. Alternatively, the second edge flange may be discontinuous along the length of the second outer edge of the elongate spacing portion and the first, lowermost outer edge of the uppermost connector plate. In exemplary embodiments, the discontinuity in the second edge flange may be located at the join between the second outer edge of the elongate spacing portion and the first, lowermost outer edge of the uppermost connector plate.
The first and, if present, the second edge flanges provide additional strength to the bracing element.
In various embodiments, at the end of the, or each, edge flange, the flange may comprise a locating lug. More specifically, the locating lug(s) is/are configured to bear onto a surface of a timber chord in use of the bracing element. More specifically, the locating lug(s) is/are located at the end of the, or each, flange depending from an outer edge of the connector plate.
The, or each, edge flange is configured such that a portion of the, or each, edge flange is operable to bear onto an upper or a lower surface of a timber chord when the bracing element is positioned between two parallel timber chords in a joist. More specifically, the portion of the or each edge flange depending from an outer edge of a connector plate is configured such that that portion of the or each edge flange is operable to bear onto an upper or a lower surface of a timber chord when the bracing element is positioned between two parallel timber chords in a joist.
In a second aspect, the present invention provides a joist comprising first and second timber chords in spaced apart parallel relation and at least one bracing element attached to the first and the second timber chords at a side surface thereof, the bracing element comprising at least one serrated edge configured to be locateable into the side surface of at least one of the first and the second timber chords.
In preferred embodiments, the, or each, bracing element is according to the first aspect of the present invention.
The at least one serrated edge is preferably embedded into the side surface of at least one of the timber chords. In preferred embodiments, the bracing element comprises a plurality of serrated edges with at least one serrated edge being locateable into a first timber chord and at least one serrated edge being locateable into a second timber chord. The edge(s) may be pressed or driven into the or each side surface of the timber chord(s). In this way, the bracing element is improved in its resistance to slipping or detachment from the, or each, timber chord in comparison to a bracing element without the serrated edge(s).
The web of the joist or truss may be formed of a plurality of bracing elements. Each of the plurality of bracing elements is attached to the first and the second timber chords with adjacent bracing elements being longitudinally spaced along the length of the timber chords.
In certain embodiments, a plurality of bracing elements is attached at a first side surface of the first and the second timber chords. In alternative or, in additional, embodiments, a plurality of bracing elements is attached at a second side surface of the first and the second timber chords.
In embodiments in which a first plurality of bracing elements is attached to a first side surface and a second plurality of bracing elements is attached to a second side surface of the first and the second timber chords, the first and second pluralities of bracing elements may be in parallel or,
alternatively, in staggered relation to one another longitudinally of the timber chords.
In certain embodiments, the joist comprises a plurality of bracing elements, at least one of which bracing elements is in accordance with the first aspect of the invention.
In preferred embodiments, the joist comprises a plurality of bracing elements each according to the first aspect of the present invention, each bracing element being attached to the upper and lower chords of the joist so as to form a web.
In certain embodiments the plurality of bracing elements are each and all attached to an outer side surface of the upper and the lower chords of the joist. In alternative embodiments, each of the plurality of bracing elements
is attached to an inner side surface of the upper and the lower chords of the joist. In yet further alternative embodiments, a first pair of bracing elements is attached to an inner side surface of the upper and the lower chords of the joist and a second pair of bracing elements is attached to an outer side surface of the upper and the lower chords of the joist. In such embodiments, the first and the second pair of bracing elements may be staggered along the length of the joist such that there bracing elements do not overlap. Alternatively, the first and the second pair of bracing elements may be located at opposing side surfaces of the chords of the joist at the same longitudinal position along the joist.
The joist may comprise opposing bracing elements positioned on either side surface of the chords of the joist. In a third aspect the invention provides a structure comprising a plurality of joists according to the second aspect of the invention.
The structure may be a floor, roof or other structure in which joists are commonly used.
In a fourth aspect the invention provides a sheet metal blank for forming a bracing element of the first aspect of the invention.
Where the terms "upper", "lower", "uppermost", "lowermost" are used within the specification, they should be considered as no more than relative, as the bracing element of the invention may be used in any appropriate orientation.
Brief Description of the Drawings
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figures 1 a and 1 b depict a bracing element according to an embodiment of the first aspect of the present invention;
Figure 2 depicts a partial schematic representation of a joist according to an embodiment of the second aspect of the present invention
Figure 3 depicts a bracing element according to a further embodiment of the first aspect of the present invention;
Figure 4 depicts a bracing element according to an alternative
embodiment of the first aspect of the present invention ; and
Figure 5 shows a partial view of a bracing element according to a yet further alternative embodiment of the first aspect of the present invention. Figures 1 a and 1 b depict a bracing element 1 according to an embodiment of the first aspect of the invention. The bracing element 1 comprises an elongate spacing portion 2, extending between two nail plates 3. Nail plates for attaching bracing elements to the timber chords of joists are known in the art and are commonly used to attach metal bracing elements to timber chords. It will, however, be apparent that alternative known attachment means suitable for attaching a bracing element to a timber joist, such as nails, screws, staples and the like, may be employed in the invention.
As illustrated in Figures 1 a and 1 b, nail plates 3 comprise a sheet-like portion or plate, in which a number of teeth 5 are formed by pressing or stamping small portions of material from the plate 3, to form teeth 5 upstanding from the rear surface 3b of each nail plate 3.
Figure 1 b shows the rear surface 1 b of the bracing element 1 and first and second edge flanges 6 depending from opposing outer edges 15 of the bracing element 1 . The edge flanges 6 are upstanding from the plane of the rear surface 1 b of the bracing element 1 at an angle of approximately 90 degrees thereto. Edge flanges 6 provide additional strength to the bracing element 1 , which prevents buckling of the bracing element under compressive loads and/or torsional forces.
Each edge flange 6 extends along the elongate spacing portion 2 from an outer edge 7 of one nail plate 3, to an inner edge 8 of another nail plate 3. The inner edge 7 is located at the heel of nail plate 3. The heel portion of each nail plate 3 adjoins the elongate spacing portion 2 of the bracing element 1 . At the outer edge 7 of each of the nail plates 3, each edge flange 6 terminates in a locating lug 9. Locating lugs 9 assist in locating and maintaining correct positioning the bracing elements 1 on the chords 1 1 , 12, as shown in Figure 2. In alternative embodiments (not shown), the edge flange 6 may extend discontinuously along only a portion of the edge of the bracing element. Adjacent the inner edge 8 of each nail plate 3, each edge flange 6 terminates in a curved edge 16, which in use, bears onto an lower face 1 1 c, or upper face 12c of a timber chord in a truss (see Figure 2).
As best seen in Figure 1 b, each nail plate 3 comprises a flange 3' depending from an outer edge thereof. Flange 3' depends at right angles
from the adjacent nail plate surface. Flange 3' has a serrated edge 20 located and arranged such that it can be pressed into the surface of a timber chord (not shown). A joist 10 comprising two bracing elements 1 at each side of a pair of parallel timber chords 1 1 , 12 is illustrated in Figure 2. Each bracing element 1 extends between an upper chord 1 1 and a lower chord 12. Opposing lower and upper faces 1 1 c, 12c of the timber chords 1 1 , 12 are held substantially parallel to, and facing one another. In use, the opposing lower and upper faces 1 1 c, 12c are substantially horizontal and the side faces 17 of the timber chords 1 1 , 12 are substantially vertical.
In manufacture of a parallel chord joist, such as the joist 10 shown in Figure 2, a bracing element 1 is attached to the timber chords 1 1 , 12 by pressing nail plates 3 and serrated edges 20 (see Figure 1 ) into respective side faces 17 of the chords such that teeth 5 and the serrated edge 20 penetrate the timber and secure the bracing element 1 in position.
Locating lugs 9 are positioned such that in use, each lug 9 rests against a lower or an upper face 1 1 c, 12c of one of the chords.
The serrated edge 20 on flange 3' provides additional strength and resistance to movement of the bracing element in the joist, both during manufacture and in use. The serrated flange penetrates the surface of a timber chord, thereby fixing the bracing element at the correct position.
Figure 3 depicts an alternative bracing element 1 ' according to the first aspect of the invention. Bracing element 1 ' comprises two nail plates 30 spaced apart and connected together by elongate spacing portion 67. The upper nail plate 30 comprises an outer edge 64 from which depends an
edge flange 61 having a serrated outer edge. The edge flange 61 depends from outer edge 64 at an angle of approximately 90 degrees. The edge flange 61 extends rearwardly of the bracing element 60. The lower nail plate 30 comprises a lower edge 68 from which depends a further edge flange 62 having a serrated outer edge. The edge flange 62 depends from lower edge 68 at an angle of approximately 90 degrees. The edge flange 62 extends rearwardly of the bracing element 1 '. In use, the serrated outer edge of edge flanges 61 , 62 are embedded into the upper and lower chords respectively of a joist to strengthen to attachment of nail plates 30 to the chords of the joist.
The actual configuration of the serrations provided on the edge flanges 61 , 62 is inessential to the invention. The serrations must be capable of penetrating the timber chord of a joist in order to embed therein. Although not shown in Figure 3, it should be understood that any or all of the edges of the nail plates 30 may having a serrated edge flange depending from one or more edges thereof.
The elongate spacing portion 67 of bracing element 1 ' comprises opposing outer edges 65a/b and 66a/b from which an edge flange 60 depends. The edge flange further strengthens the bracing element 1 '.
In another embodiment as shown in Figure 4, the bracing element 101 is of the V-shaped type and comprises four nail plates 103. In this
embodiment, two nail plates 103a and 103d are attachable to a lower chord 12 (not shown) and spaced apart from one another. The other nail plates 103b and 103c are attachable to an upper chord 1 1 (not shown) adjacent one another. The nail plates 103 may be joined to, or formed integrally with, one another. In one embodiment, the V-shaped bracing element may be separable at the nail plates103b, 103c to form two bracing elements of the l-shaped type.
The bracing element 101 differs from bracing elements 1 and 1 ' in that the nail plates 103 have fastener apertures 105 in place of nails. The bracing element 101 may, alternatively, have nail plates 3 and teeth 5 as shown in Figures 1 , 2 and 3. It will be readily understood that in a yet further arrangement, the bracing element may be provided with both fastener apertures and teeth on the nail plate(s) thereof.
The fastener apertures 105 are configured to receive any appropriate fastener such as, for example, screws, nails, staples or the like.
The bracing element 101 of Figure 4 is, initially, a V-shaped bracing element, comprising two separable bracing elements 101 a and 101 b, each comprising an elongate spacing portion 102a, 102b and two connector plates 103a, 103b, 103c, 103d.
The lower edge 168a, 168b, 168c, 168d of each connector plate 103a, 103b, 103c, 103d comprises an edge flange 162a, 162b, 162c, 162d with a serrated outer edge. The serrated outer edge of each flange may be embedded into a timber chord during the manufacture of a joist using the bracing element of the present invention. The embedded flanges 162a, 162b, 162c, 162d increase the stability of the joist and, in particular, resist slipping of the bracing element once same is in position on the timber chord. The flanges 162a, 162b, 162c, 162d each end at a heel portion 1 15ac, 1 15bc, 1 15cc, 1 15dc of the connector plates 103a, 103b, 103c, 103d of the bracing element 101 .
Edge flanges 1 15a, 1 15b, 1 15c and 1 15d depend from the outer edges of elongate portions 102a and 102b so as to provide strength to the bracing element 101 .
It will be clearly understood that bracing element 101 may be used as a single, V-shaped bracing element or may be separated between connector plates 103b and 103c to form two separate bracing elements 101 a and 101 b.
Also shown in Figure 4 are ribs 165a and 165b. The ribs 165a and 165b are embossed in the material of elongate spacing portions 102a and 102b and provide additional strength to the bracing element 101 .
In further embodiments not shown, the bracing element may be formed as a substantially L-shaped or W-shaped bracing element, or any other bracing element shapes known in the field.
Similarly, such bracing elements may also be separable into component bracing element s such as V-shaped and/or l-shaped bracing elements.
The bracing element 1 , 1 ', 101 may be formed by folding, bending, stamping, punching and/or pressing operations. In manufacture, the bracing element 1 , 1 ', 101 may be initially formed as a sheet metal blank, which is subsequently punched and folded into the desired configuration of the bracing element 1 , 1 ', 101 .
The bracing element 1 , 1 ', 101 is preferably formed of a galvanised steel material.
Figure 5 depicts a partial rear view of a bracing element 201 . The elongate spacing portion 202 of bracing element 201 adjoins a connector plate 203. Elongate spacing portion 202 is formed integrally with the connector plate 203 from a single sheet of galvanised steel. The elongate spacing portion 202 comprises first and second edge flanges 206. The first edge flange 206a extends the length of the edge of the elongate
spacing portion 202 along the upper edge of connector plate 203 to an outer edge 207 of connector plate 203. The first edge flange 206a has a locating lug 209 proximate the outer edge 207. The second edge flange 206b, extends the length of the edge of the elongate spacing portion 202 to the heel portion of the connector plate 203 at an inner edge 208 of connector plate 203. Connector plate 203 comprises fastener apertures 205 for receiving any suitable fastener such as nails, screws, staples or the like.
Flange 261 depends substantially perpendicularly from the lower edge 268 of connector plate 203. The outermost edge of flange 261 is serrated in order that the flange may be embedded into a timber chord of a joist. Flange 261 extends from the inner edge 208 to the outer edge 207 of the connector plate 203.
Figure 5 also comprises a rib 265 formed in the elongate spacing portion 202. Rib 265 may be formed by embossing, for example, and acts to strengthen the elongate spacing portion 202.
Claims
1 . A bracing element comprising at least two connector plates connected to and spaced apart from one another by at least one elongate spacing portion, at least one edge of the bracing element comprising a serrated edge configured to be locateable into the surface of a timber element.
2. A bracing element according to claim 1 , wherein the serrated edge is located on the elongate spacing portion.
3. A bracing element according to claim 1 or claim 2, wherein the serrated edge is located on at least one of the connector plates.
4. A bracing element according to claim 3, wherein each connector plate comprises at least one serrated edge.
5. A bracing element according to any one of the preceding claims, wherein the serrated edge is provided on a flange.
6. A bracing element according to claim 5, wherein the flange depends from an edge of the elongate spacing element.
7. A bracing element according to claim 5 or claim 6, wherein the flange depends from an edge of at least one of the connector plates.
8. A bracing element according to claim 7, wherein the flange comprising the serrated edge depends from one or more edges of a connector plate.
9. A bracing element according to claim 8, wherein the flange is continuous along one or more edges of the connector plate.
10. A bracing element according to claim 8, wherein the flange is discontinuous along the one or more edges of the connector plate.
1 1 . A joist comprising first and second timber chords in spaced apart parallel relation and at least one bracing element attached to the first and the second timber chords at a side surface thereof, the bracing element comprising at least one serrated edge configured to be locateable into the side surface of at least one of the first and the second timber chords.
12. A joist according to claim 1 1 , wherein the, or each, bracing element is according to any one of claims 1 to 10.
13. A joist according to claim 1 1 or claim 12, wherein the serrated edge is embedded into the side surfaces of the timber chords.
14. A joist according to any one of claims 1 1 to 13 comprising a plurality of bracing elements, wherein at least one of the bracing elements is a bracing element according to any one of claims 1 to 10.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1204029.1 | 2012-03-07 | ||
GB1204029.1A GB2500032B (en) | 2012-03-07 | 2012-03-07 | Bracing element having a serrated edge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013134058A1 true WO2013134058A1 (en) | 2013-09-12 |
Family
ID=46003281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2013/028549 WO2013134058A1 (en) | 2012-03-07 | 2013-03-01 | Bracing element |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2500032B (en) |
WO (1) | WO2013134058A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2622443A (en) * | 2022-09-16 | 2024-03-20 | Illinois Tool Works | Web element for a joist |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2895369A (en) * | 1955-11-30 | 1959-07-21 | James B Andersen | Plank protector with cold worked deflecting teeth |
GB1286122A (en) * | 1969-09-03 | 1972-08-23 | Stimber Lite Sales Private Ltd | Truss construction |
WO1990002854A1 (en) * | 1988-09-14 | 1990-03-22 | Poutanen Tuoma Tapani | Improvements in connector plates, connector plate joints and connector plate structures |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4348850A (en) * | 1979-08-06 | 1982-09-14 | Moehlenpah Industries, Inc. | Web member |
-
2012
- 2012-03-07 GB GB1204029.1A patent/GB2500032B/en active Active
-
2013
- 2013-03-01 WO PCT/US2013/028549 patent/WO2013134058A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2895369A (en) * | 1955-11-30 | 1959-07-21 | James B Andersen | Plank protector with cold worked deflecting teeth |
GB1286122A (en) * | 1969-09-03 | 1972-08-23 | Stimber Lite Sales Private Ltd | Truss construction |
WO1990002854A1 (en) * | 1988-09-14 | 1990-03-22 | Poutanen Tuoma Tapani | Improvements in connector plates, connector plate joints and connector plate structures |
Also Published As
Publication number | Publication date |
---|---|
GB2500032A (en) | 2013-09-11 |
GB201204029D0 (en) | 2012-04-18 |
GB2500032B (en) | 2017-05-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7856763B2 (en) | Truss hold-down connectors and methods for attaching a truss to a bearing member | |
US4438611A (en) | Stud fasteners and wall structures employing same | |
CA2947769C (en) | Integral truss plate connector | |
EP2527547B1 (en) | Saddle hanger for a structure | |
US8484927B2 (en) | Right-angle girder tie | |
EP1213399A2 (en) | Truss spacer and brace | |
US20140311082A1 (en) | Modular wall stud brace | |
GB2122234A (en) | Insulated roof | |
US20070209311A1 (en) | Truss hold-down connectors and methods for attaching a truss to a bearing member | |
US4111096A (en) | Fastening device | |
EP2924186B1 (en) | Building connection with nail plate hanger with bendable tab | |
US6412246B1 (en) | Structural truss | |
US4566241A (en) | Progressive demountable partition | |
WO2013134058A1 (en) | Bracing element | |
US4545103A (en) | Method of securing an insulation member to a wall or wall-stud assembly | |
US6397527B1 (en) | Roof bracing and braced roof structures | |
GB2500030A (en) | Bracing element for a joist or truss | |
CA1289721C (en) | Connector for joining building components together in a double-sided construction | |
US5848548A (en) | Method of forming at least two carpet fastener strips from a single sheet of sheet metal | |
WO2015135054A1 (en) | Modular wall stud brace | |
AU2012101413A4 (en) | Coupling of battens in a roof structure | |
EP2253856A1 (en) | Nail Plate | |
JP3024965U (en) | Metal fittings for fixing rafters to temporary pipes | |
AU730702B2 (en) | Structural truss | |
US20140250823A1 (en) | Truss reinforcement system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13710217 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13710217 Country of ref document: EP Kind code of ref document: A1 |