Structural member suitable for use as a joist, beam, girder or the like
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0264006
(1981-05-15)
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발명자
/ 주소 |
- Christ-Janer Victor F. (4 Forest St. New Canaan CT 06840)
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인용정보 |
피인용 횟수 :
3 인용 특허 :
1 |
초록
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An elongated structural member, which is suitable for use as a joist, beam, girder or the like, comprises first and second webs, each having a generally arcuate cross-sectional shape and, thus, one convex surface and an opposing concave surface. The webs are disposed in generally mutually parallel r
An elongated structural member, which is suitable for use as a joist, beam, girder or the like, comprises first and second webs, each having a generally arcuate cross-sectional shape and, thus, one convex surface and an opposing concave surface. The webs are disposed in generally mutually parallel relation with their respective convex surfaces in confronting relation, one diverging from the other in both an upper region and a lower region. A wedge is interposed between, conforms to, and is intimately joined to the confronting convex surfaces of the webs in at least a portion of each of the upper and the lower regions. The webs are made of plywood and the wedges are made of solid wood. The wedges are capable of bearing substantial compression and tension loads so that together with the portions of the webs to which they are intimately joined, they can accept and support great loads on the member when mounted in span. More particularly, each wedge has a tension or tensile strength on the order of at least 950 pounds per square inch and a compressive strength on the order of at least 950 pounds per square inch.
대표청구항
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An elongated joist, beam, girder or similar structural member, comprising: first and second elongated plywood webs each having a generally arcuate cross-sectional shape and, thus, one generally convex surface and an opposing generally concave surface, said webs being disposed in generally mutually p
An elongated joist, beam, girder or similar structural member, comprising: first and second elongated plywood webs each having a generally arcuate cross-sectional shape and, thus, one generally convex surface and an opposing generally concave surface, said webs being disposed in generally mutually parallel relation with said convex surfaces in mutually confronting relation, one of said convex surfaces diverging from the other thereof in both an upper generally V-shaped region and a lower generally V-shaped region, said webs thereby defining two parallel spaced top edges and two parallel spaced bottom edges; and upper and lower generally V-shaped structural wedges interposed between and conforming to said confronting convex surfaces of said first and second webs throughout their length in respectively said upper region and said lower region; and adhesive means intimately and continuously joining each of said upper and lower wedges in the respective upper and lower regions with the V-shaped surfaces of said wedges intimately and continuously joined to the respective confronting convex surfaces of said first and second webs; said upper wedge having a base substantially coextensive with and spanning the distance between said spaced top edges of said webs and together therewith defining an exposed upper load supporting surface, said lower edge also having a base substantially coextensive with and spanning the distance between said spaced bottom edges of said webs and together therewith defining an exposed base surface, said upper wedge consisting of a wood material selected from the group of wood materials capable of bearing substantial compression loads of at least about 950 pounds per square inch without structural failure in order to, together with the portions of said webs to which it is intimately joined by said adhesive means, accept and support load on said upper load supporting surface of said member in compression and said lower wedge consisting of a wood material selected from the group of wood materials capable of bearing substantial tension loads of at least about 950 pounds per square inch without structural failure in order to, together with the portions of said webs to which it is intimately joined by said adhesive means, accept and support load on said member in tension.
이 특허에 인용된 특허 (1)
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Lackman Leslie M. (Tarzana CA) Hill John A. (Lawndale CA), Reinforced composite structure and method of fabrication thereof.
이 특허를 인용한 특허 (3)
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Jakobsson Bertil,SEX, Beam arrangement.
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Yang, WeiHong, Composite I-beam member.
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Yang, WeiHong, Steel and wood composite structure with metal jacket wood studs and rods.
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