Lattice panel structures
AssigneeMabey & Johnson Limited
InventorsRichard Charles Edward Forsyth, Bevil Guy Mabey, John Meynell Richardson
Life of this patent
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Abstract
A modular system for the construction of a lattice panel for a bridge, comprises first and second chord members (20, 28) and a plurality of web members (1). Each web member comprises three legs forming a triangle. One leg (2) extends perpendicularly between the chord members. The second and third legs (3, 4) are joined to each other and to the ends of the first leg. The ends of the first leg (1) are provided with means for connecting the web member to the chords (20, 28). Interlocking means (13, 19) are provided at the joint between the second and third legs, and mid way along the first leg, so that adjacent web members can be connected together.
Claims66
A modular system for the construction of a lattice panel for a structure, comprising first and second elongate chord members and a plurality of web members for attachment to the chord members so as to hold them apart transversely, wherein each web member comprises three legs forming a triangle, a first leg being adapted to extend perpendicularly between the chord members, and second and third legs being joined to each other and to adjacent the ends of the first leg, and wherein there are provided the following means for interlocking each web member to the chord members and to like web members:
- first interlocking means adjacent one end of the first leg to interlock with corresponding second interlocking means provided at intervals along the first chord member;
- third interlocking means adjacent the other end of the first leg to interlock with corresponding fourth interlocking means provided at intervals along the second chord member;
- fifth interlocking means adjacent the join between the second and third legs;
- and
- sixth interlocking means intermediate the ends of the first leg;
- the arrangement being such that the fifth interlocking means of one web member is adapted to interlock with the sixth interlocking means of an adjacent like web member;
- wherein the first leg is provided at each end with a junction unit, one being attached to the second leg and having the first interlocking means for connection to a chord member, and one being attached to the third leg and having the third interlocking means for connection to a chord member.
A modular system for the construction of a lattice panel for a structure, comprising first and second elongate chord members and a plurality of web members for attachment to the chord members so as to hold them apart transversely, wherein each web member comprises three legs forming a triangle, a first leg being adapted to extend perpendicularly between the chord members, and second and third legs being joined to each other and to adjacent the ends of the first leg, and wherein there are provided the following means for interlocking each web member to the chord members and to like web members:
- first interlocking means adjacent one end of the first leg to interlock with corresponding second interlocking means provided at intervals along the first chord member;
- third interlocking means adjacent the other end of the first leg to interlock with corresponding fourth interlocking means provided at intervals along the second chord member;
- fifth interlocking means adjacent the join between the second and third legs;
- and
- sixth interlocking means intermediate the ends of the first leg;
- the arrangement being such that the fifth interlocking means of one web member is adapted to interlock with the sixth interlocking means of an adjacent like web member;
- wherein the first leg comprises a pair of parallel, spaced elements.
A modular system for the construction of a lattice panel for a structure, comprising first and second elongate chord members and a plurality of web members for attachment to the chord members so as to hold them apart transversely, wherein each web member comprises three legs forming a triangle, a first leg being adapted to extend perpendicularly between the chord members, and second and third legs being joined to each other and to adjacent the ends of the first leg, and wherein there are provided the following means for interlocking each web member to the chord members and to like web members:
- first interlocking means adjacent one end of the first leg to interlock with corresponding second interlocking means provided at intervals along the first chord member;
- third interlocking means adjacent the other end of the first leg to interlock with corresponding fourth interlocking means provided at intervals along the second chord member;
- fifth interlocking means adjacent the join between the second and third legs;
- and
- sixth interlocking means intermediate the ends of the first leg;
- the arrangement being such that the fifth interlocking means of one web member is adapted to interlock with the sixth interlocking means of an adjacent like web member;
- wherein the first leg of at least some of the web members comprises means for attachment to a transom.
A modular system for the construction of a lattice panel for a structure, comprising first and second elongate chord members and a plurality of web members for attachment to the chord members so as to hold them apart transversely, wherein each web member comprises three legs forming a triangle, a first leg being adapted to extend perpendicularly between the chord members, and second and third legs being joined to each other and to adjacent the ends of the first leg, and wherein there are provided the following means for interlocking each web member to the chord members and to like web members:
- first interlocking means adjacent one end of the first leg to interlock with corresponding second interlocking means provided at intervals along the first chord member;
- third interlocking means adjacent the other end of the first leg to interlock with corresponding fourth interlocking means provided at intervals along the second chord member;
- fifth interlocking means adjacent the join between the second and third legs;
- and
- sixth interlocking means intermediate the ends of the first leg;
- the arrangement being such that the fifth interlocking means of one web member is adapted to interlock with the sixth interlocking means of an adjacent like web member;
- wherein the first leg comprises a pair of parallel, spaced tubular elements.
A modular system for the construction of a lattice panel for a structure, comprising first and second elongate chord members and a plurality of web members for attachment to the chord members so as to hold them apart transversely, wherein each web member comprises three legs forming a triangle, a first leg being adapted to extend perpendicularly between the chord members, and second and third legs being joined to each other and to adjacent the ends of the first leg, and wherein there are provided the following means for interlocking each web member to the chord members and to like web members:
- first interlocking means adjacent one end of the first leg to interlock with corresponding second interlocking means provided at intervals along the first chord member;
- third interlocking means adjacent the other end of the first leg to interlock with corresponding fourth interlocking means provided at intervals along the second chord member;
- fifth interlocking means adjacent the join between the second and third legs;
- and
- sixth interlocking means intermediate the ends of the first leg;
- the arrangement being such that the fifth interlocking means of one web member is adapted to interlock with the sixth interlocking means of an adjacent like web member;
- wherein the first leg of the web member comprises an elongate member having at each end respective first and second mounting plates perpendicular to the axis of the first leg, one mounting plate being provided with the first interlocking means for connection to a chord member and with at least one aperture to receive a fastener to secure the mounting plate to the chord member, and the other mounting plate being provided with the third interlocking means for connection to a chord member and with at least one aperture to receive a fastener to secure the mounting plate to the chord member;
- wherein the second and third legs of the web member extend at an acute angle from adjacent the ends of the first leg to a junction where there is provided a third mounting plate whose plane is parallel to the longitudinal direction of the first leg, the third mounting plate being provided with the fifth interlocking means for connection to another web member and with at least one aperture to receive a fastener to secure the mounting plate to the other member;
- and
- wherein the first leg of the web member is provided with a fourth mounting plate intermediate its ends whose plane is parallel to the longitudinal direction of the first leg, the plate being provided with the sixth interlocking means for connection to the second interlocking means of another web member, and also being provided with at least one aperture to receive a fastener to secure the plate to the other web member.
A bridge comprising a structural member formed from a plurality of lattice panels joined end to end, each lattice panel being of modular construction and having:
- an upper elongate chord member;
- a lower elongate chord member;
- and
- a plurality of web members which are connected to the chord members to hold them apart vertically and which are also connected to each other;
- wherein:
- the upper chords of adjacent panels are connected together, the lower chords of adjacent panels are connected together, and a web member of one panel is connected to a web member of an adjacent panel;
- and wherein:
- each web member comprises three legs forming a triangle, a first leg being adapted to extend perpendicularly between the chord members, and second and third legs being joined to each other and to adjacent the ends of the first leg, and wherein there are provided the following means for interlocking each web member to the chord members and to like web members:
- first interlocking means adjacent one end of the first leg to interlock with corresponding second interlocking means provided at intervals along the upper chord member;
- third interlocking means adjacent the other end of the first leg to interlock with corresponding fourth interlocking means provided at intervals along the lower chord member;
- fifth interlocking means adjacent the join between the second and third legs;
- and
- sixth interlocking means intermediate the ends of the first leg;
- the arrangement being such that the fifth interlocking means of one web member in one lattice panel is interlocked with the sixth interlocking means of an adjacent like web member in the said one lattice panel, and the fifth interlocking means of another web member in said one panel is interlocked with the sixth interlocking means of a web member in an adjacent lattice panel.
A bridge as claimed in 38, wherein one of the chord members is provided with apertures at its ends to form tension joints with chord members of like panels by the use of splice plates and fasteners passing through the splice plates and the apertures.
A prefabricated web member for use in a modular system for the construction of a lattice panel for a structure, the modular system comprising first and second elongate chord members and a plurality of said web members for attachment to the chord members so as to hold them apart transversely, wherein the web member comprises three legs forming a triangle, a first leg being adapted to extend perpendicularly between the chord members, and second and third legs being joined to each other and to adjacent the ends of the first leg, and wherein there are provided the following means for interlocking the web member to the chord members and to like web members:
- first interlocking means adjacent one end of the first leg to interlock with corresponding second interlocking means provided at intervals along the first chord member;
- third interlocking means adjacent the other end of the first leg to interlock with corresponding fourth interlocking means provided at intervals along the second chord member;
- fifth interlocking means adjacent the join between the second and third legs;
- and
- sixth interlocking means intermediate the ends of the first leg;
- the arrangement being such that the fifth interlocking means of the web member is adapted to interlock with the sixth interlocking means of an adjacent like web member;
- and wherein
- said first leg comprises an elongate member having at each end respective first and second mounting plates perpendicular to the axis of the first leg, one mounting plate being provided with the first interlocking means for connection to a chord member and with at least one aperture to receive a fastener to secure the mounting plate to the chord member, and the other mounting plate being provided with the third interlocking means for connection to a chord member and with at least one aperture to receive a fastener to secure the mounting plate to the chord member;
- said second and third legs extend at an acute angle from adjacent the ends of the first leg to a junction where there is provided a third mounting plate whose plane is parallel to the longitudinal direction of the first leg, the third mounting plate being provided with the fifth interlocking means for connection to another web member and with at least one aperture to receive a fastener to secure the mounting plate to the other member;
- and
- said first leg is provided with a fourth mounting plate intermediate its ends whose plane is parallel to the longitudinal direction of the first leg, the plate being provided with the sixth interlocking means for connection to the second interlocking means of another web member, and also being provided with at least one aperture to receive a fastener to secure the plate to the other web member.
Dependencies are inferred from the claim text.