Static structures (e.g. – buildings) – Machine or implement
Patent
1980-12-18
1983-10-18
Friedman, Carl D.
Static structures (e.g., buildings)
Machine or implement
52732, E04B 118
Patent
active
044097719
ABSTRACT:
A panel of thin sheet metal is roll-formed into a beam having upper and lower first flange portions integrally connected by a web portion. The first flange portions are reinforced by corresponding second flange portions which may be separate or formed from the panel and folded back onto the corresponding first flange portion. The upper and lower flange portions may project in opposite directions from the web portion providing the beam with a Z-shaped cross-sectional configuration to facilitate close nesting of the beams in a stack, or the web portion may be disposed in the center of the flange portions to provdie an "I" cross-sectional configuration. A plurality of parallel spaced stiffening ribs are formed in the web portion, and longitudinally extending stiffening ribs are formed in the flange portions. When the ribs in the web portion extend longitudinally of the beam, a series of longitudinally spaced strut members extend vertically between the flange portions adjacent the ribs and are attached to the flange and web portions. The strut members may extend through corresponding sets of aligned holes within the ribs or may conform to the ribbed configuration of the web portion. The second flange portions may also comprise separate heavier sheet metal strips which are attached to the first flange portions, and the strut members may be molded or cast from a flowable material.
REFERENCES:
patent: 3300839 (1967-01-01), Lichti
patent: 4047354 (1977-09-01), Sutherland
patent: 4329824 (1982-05-01), Lowe
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