Joist

Details Joist Joist

1975-06-03

1977-04-05

Ridgill, Jr., James L.

Static structures (e.g., buildings)

Openwork; e.g., truss, trellis, grille, screen, frame, or...

Side-by-side terminus shafts; e.g., truss

52729, 29155R, E04C 316, E04C 3293, E04C 307

Patent

active

040153967

ABSTRACT:
A steel joist having an upper chord, a web, and a lower chord; the upper chord consisting of an S shaped cross section elongated member having in one form a lower reverse flange at the base of the S, the flange being connected to the web so that the center of gravity of the joist is in the region of its central axis, the region between the base of the S and the reverse flange including an inclined step.

REFERENCES:
patent: 1629479 (1927-05-01), Cober
patent: 1725501 (1929-08-01), Yeager
patent: 1911018 (1933-05-01), Goeltz
patent: 1974730 (1934-09-01), Zollinger
patent: 2256812 (1941-09-01), Miller
patent: 2459037 (1949-01-01), McIntosh
patent: 2508635 (1950-05-01), Badt
patent: 3284971 (1966-11-01), Attwood
patent: 3845594 (1974-11-01), Hall et al.
F. R. Shanley, Strength of Materials, McGraw-Hill Book Co., N. Y., 1957, pp. 209-212.

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