Method of making a building column

Details Method of making a building column Method of making a building column

1978-02-16

1979-10-02

Larson, Lowell A.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

295271, 264 466, 264 467, B23P 1700

Patent

active

041693043

ABSTRACT:
One or more thin metal sheets are formed as a hollow shell having a longitudinal load-bearing axis. The thin-walled hollow shell is filled with a core of a plastic foaming material including a suitable foaming agent which foams to fill the shell and to exert a force on the shell radially outwardly of the longitudinal axis thereby forming a solid composite column. The radially outward force deflects the shell and permanently places the shell in lateral tension to increase the load bearing capability of the column. When more than one sheet is used, the elongated edge portions of the sheets are configured to loosely interfit with one another when the shell is initially formed, and the plastic foaming material causes a positive locking of the interfitted edge portions. Thus thin, non-load bearing gauge aluminum is converted into a load bearing structural element.

REFERENCES:
patent: 1876166 (1932-09-01), Randall
patent: 2976577 (1961-03-01), Gould
patent: 3301927 (1967-01-01), Exley et al.
patent: 3566000 (1971-02-01), Maurer et al.
patent: 3634565 (1972-01-01), Schaerer

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