Static structures (e.g. – buildings) – With component having discrete prestressing means – Beam – girder – or truss construction
Patent
1978-11-16
1981-06-30
Faw, Jr., Price C.
Static structures (e.g., buildings)
With component having discrete prestressing means
Beam, girder, or truss construction
52223L, 52227, 52642, 52644, 52691, 52693, E04C 310
Patent
active
042755379
ABSTRACT:
Prestressed composite tension members comprise an assembly which includes compression and tension portions which are loaded longitudinally along or symmetrical with the center of gravity of the compression portion and prestressed causing both the tension and compression portions to cooperate in resisting lengthening of the assembly rather than the tension portion alone, thus lessening such elongations. In one embodiment, the tension member forms a tension member in a truss, having an upper chord and vertical webs acting in compression, and the tension member comprises a tensioned cable mounted within a series of abutting, slotted and glued wood members under compression. In another embodiment, the tension member comprises a tensioned cable centered in a plurality of tubes in compression, forming the truss lower chord. In another truss, the lower chord consists of the tension member comprised of a tensioned cable centered in a slotted wood member under compression with the end cable grips bearing on a bearing plate at the end of the compression member. In another truss lower chord, the tension member consists of a tensioned cable centered in a slotted wood member under compression with the end cable grips bearing on a plate at the end of the truss heel assembly. In another truss embodiment, the tension member comprises a tensioned, high strength, steel strap encircling the sides and ends of the wood compression member. In another embodiment, the tension member comprises tensioned cables centered in a slotted, glued-laminated compression member, such tension member forming the main structural elements of the roof system. In another, a plurality of tension members having tensioned cable cores and tubes in compression and connecting a central ring to an outer ring create a tension structure. In another embodiment, a tension-compression structure is created and comprises a tensioned cable centered in a slotted, glued-laminated, compression portion. In another embodiment, a mechanism, capable of supporting a substantial load at its end, comprises metal tubes abutting a high friction material abutting spherical balls allowing mobility and the ability to assume many different positions.
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Faw Jr. Price C.
Friedman Carl D.
Tension Structures, Inc.
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