Giant, 24-foot-long columns of steel and concrete have been tested at the National Bureau of Standards with equipment capable of exerting a maximum of 10,000,000 pounds. As much as 8,314,000-pounds load was exerted on the concrete-incased steel columns while only 5,853,000 was applied to similar steel columns alone.
The increase in the average of the final maximum load, due to the concrete, was 42 percent, report scientists Dr.
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