초록 ▼

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 th

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.

대표청구항 ▼

1. 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

1. 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; andsixth 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. 2. A system as claimed in claim 1, wherein the web member is in the form of an isosceles triangle, with the second and third legs oaf equal length. 3. A system as claimed in claim 2, wherein each of the second and third legs is inclined to the first leg at an angle of between about 35° to 45°. 4. A system as claimed in claim 1, wherein the second and third legs are joined together by a junction unit which receives the ends of both legs and is provided with the fifth interlocking means. 5. A system as claimed in claim 1, wherein one of the first and second interlocking means comprises a spigot and the other comprises a recess adapted to receive the spigot. 6. A system as claimed in claim 5, wherein said one of the first and second interlocking means comprises a plurality of spigots. 7. A system as claimed in claim 5, wherein the said one of the first and second interlocking means is the first interlocking means. 8. A system as claimed in claim 5, wherein the first and second interlocking means further comprise aligned apertures for receiving fasteners to secure the web member to the chord member. 9. A system as claimed in claim 1, wherein one of the third and fourth interlocking means comprises a spigot and the other comprises a recess adapted to receive the spigot. 10. A system as claimed in claim 9, wherein said one of the third and fourth interlocking means comprises a plurality of spigots. 11. A system as claimed in claim 9, wherein the said one of the third and fourth interlocking means is the third interlocking means. 12. A system as claimed in claim 9, wherein the third and fourth interlocking means further comprise aligned apertures for receiving fasteners to secure the web member to the chord member. 13. A system as claimed in claim 1, wherein one of the fifth and sixth interlocking means comprises a spigot and the other comprises a recess adapted to receive the spigot. 14. A system as claimed in claim 13, wherein the fifth and sixth interlocking means further comprise aligned apertures for receiving fasteners to secure one web member to an adjacent web member. 15. A system as claimed in claim 13, wherein one of the fifth and sixth interlocking means comprises a plurality of vertically spaced spigots and the other comprises a corresponding plurality of apertures adapted to receive the spigots. 16. A system as claimed in claim 1, wherein the first leg comprises a pair of parallel, spaced elements. 17. A system as claimed in claim 1, wherein the first leg of at least some of the web members comprises means for attachment to a transom. 18. A system as claimed in claim 1, wherein one of the chord members is provided with apertured flanges at its ends and is configured to form compression joints with chord members of like panels with fasteners passing through the apertures. 19. A system as claimed in claim 1, wherein one of the chord members is provided with apertures at its ends and is configured to form tension joints with chord members of like panels with splice plates and fasteners passing through the splice plates and the apertures. 20. A system as claimed in claim 16 wherein the parallel, spaced elements are tubular. 21. A system as claimed in claim 1, whereinthe 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;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; andthe 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. 22. A lattice panel constructed from a system as claimed in claim 1, comprising the upper and lower chord members and a plurality of the web members connected to the chord members and to each other. 23. A structural member comprising a plurality of panels as claimed in claim 22 joined end to end, with the upper chords of adjacent panels connected together, the lower chords of adjacent panels connected together, and a web member of one panel being connected to a web member of an adjacent panel by means of the fifth interlocking means of the web member of one panel being interlocked with the sixth interlocking means of the web member of the other panel. 24. A structure comprising a structural member as claimed in claim 23. 25. A structure as claimed in claim 24, in the form of a bridge. 26. A prefabricated web member for use as the web member in a system as claimed in any of claims 1 , comprising three legs forming a triangle, wherein:a 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;the 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 mount ing 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; andthe 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. 27. A web member as claimed in claim 26, wherein the second and third legs are of substantially equal lengths. 28. A web member as claimed in claim 27, wherein each of the second and third legs extends at from about 35° to 45° to the first leg. 29. A web member as claimed in claim 26, wherein one of the fifth and sixth interlocking means comprises a spigot and the other comprises a recess adapted to receive the spigot. 30. A web member as claimed in claim 29, wherein one of the fifth and sixth interlocking means comprises a plurality of vertically spaced spigots and the other comprises a corresponding plurality of apertures adapted to receive the spigot. 31. A web member as claimed in any of claims 26 , wherein each of the first and third interlocking means comprises a spigot. 32. A web member as claimed in any of claims 26 , wherein the first leg comprises a pair of parallel, spaced elements. 33. A web member as claimed in claim 32 wherein the parallel, spaced elements are tubular. 34. 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; andsixth 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. 35. 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; andsixth interlocking means intermediat e 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. 36. 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; andsixth 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. 37. 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; andsixth 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; andwherein the first leg of the web member is p rovided 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. 38. 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; anda 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; andsixth 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. 39. A bridge as claimed in claim 38, wherein the web member is in the form of an isosceles triangle, with the second and third legs of equal length. 40. A bridge as claimed in claim 39, wherein each of the second and third legs is inclined to the first leg at an angle of between about 35° to 45°. 41. A bridge as claimed in claim 38, wherein the second and third legs are joined together by a junction unit which receives the ends of both legs and is provided with the fifth interlocking means. 42. A bridge as claimed in claim 38, 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. 43. A bridge as claimed in claim 38, wherein one of the first and second interlocking means comprises a spigot and the other comprises a recess adapted to receive the spigot. 44. A bridge as claimed in claim 43, wherein said one of the first and second interlocking means comprises a plurality of spigots. 45. A bridge as claimed in claim 43, wherein the said one of the first and second interlocking means is the first interlocking means. 46. A bridge as claimed in claim 43, the first and second interlocking means further comprise aligned apertures for receiving fasteners to secure the web member to the chord member. 47. A bridge as claimed in claim 38, wherein one of the third and fourth interlocking means comprises a spigot and other comprises a recess adapted to receive the spigot. 48. A bridge as claimed in claim 47, wherein said one of the third and fourth interlocking means comprises a plurality of spigots. 49. A bridge as claimed in claim 47, wher ein the said one of the third and fourth interlocking means is the third interlocking means. 50. A bridge as claimed in claim 47, wherein the third and fourth interlocking means further comprise aligned apertures for receiving fasteners to secure the web member to the chord member. 51. A bridge as claimed in claim 38, one of the fifth and sixth interlocking means comprises a spigot and the other comprises a recess adapted to receive the spigot. 52. A bridge as claimed in claim 51, wherein the fifth and sixth interlocking means further comprise aligned apertures for receiving fasteners to secure one web member to an adjacent web member. 53. A bridge as claimed in claim 51, wherein one of the fifth and sixth interlocking means comprises a plurality of vertically spaced spigots and the other comprises a corresponding plurality of apertures adapted to receive the spigots. 54. A bridge as claimed in claim 38, wherein the first leg comprises a pair of parallel, spaced elements. 55. A bridge as claimed in claim 38, wherein the first leg of at least some of the web members comprises means for attachment to a transom. 56. A bridge as claimed in claim 38, wherein one of the chord members is provided with apertured flanges at its ends to form compression joints with chord members of like panels by the use of fasteners passing through the apertures. 57. 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. 58. A bridge as claimed in claim 54 wherein the parallel, spaced elements are tubular. 59. 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; andsixth 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 whereinsaid 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 secur e the mounting plate to the other member; andsaid 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. 60. A web member as claimed in claim 59, wherein the second and third legs are of substantially equal lengths. 61. A web member as claimed in claim 60, wherein each of the second and third legs extends at from about 35° to 45° to the first leg. 62. A web member as claimed in claim 59, wherein one of the fifth and sixth interlocking means comprises a spigot and the other comprises a recess adapted to receive the spigot. 63. A web member as claimed in claim 62, wherein one of the fifth and sixth interlocking means comprises a plurality of vertically spaced spigots and the other comprises a corresponding plurality of apertures adapted to receive the spigot. 64. A web member as claimed in claim 59, wherein each of the first and third interlocking means comprises a spigot. 65. A web member as claimed in claim 59, wherein the first leg comprises a pair of parallel, spaced elements. 66. A web member as claimed in claim 65 wherein the parallel, spaced elements are tubular.