Canadian foundryman (1917) . .was the heaviest capacity car on anvTailroad during the time of the Worlds•Columbian Exposition at Chicago, in was strongly areued at that time thatThe wheel load of 11,000 lbs., which wasrequired under cars of 30 ton capacityras the maximum that could be carriedm a 33 ins. diameter wheel, because the •From a naper read Feb. 13 at the Canadian?Railway Club, Montreal. ••President. Association of Manufacturers ofChilled Car Wheels. Chicago. 111. area contact between the wheel and railbeing so small, any greater load wouldcause- a permanent injury to both whe
Canadian foundryman (1917) . .was the heaviest capacity car on anvTailroad during the time of the Worlds•Columbian Exposition at Chicago, in was strongly areued at that time thatThe wheel load of 11,000 lbs., which wasrequired under cars of 30 ton capacityras the maximum that could be carriedm a 33 ins. diameter wheel, because the •From a naper read Feb. 13 at the Canadian?Railway Club, Montreal. ••President. Association of Manufacturers ofChilled Car Wheels. Chicago. 111. area contact between the wheel and railbeing so small, any greater load wouldcause- a permanent injury to both wheeland rail by reason of the fact that theelastic limit in the metal would be ex-ceeded, resulting in dents in the railand fiat spots in the wheel tread. Not only was 11,000 lbs. per wheelconsidered the maximum wheel load, butthere was a good deal of doubt expressedby the foremost engineers as to whe-ther this load was not in excess of goodpractice. The introduction of the 30-ton car was very rapid on all DEVELOPMENT OF FLANGE AXD TREAD OF THE CHILLED IRON WHEEL DNDER GROWING REQUIREMENTS. A chilled iron wheel weighing 000 used under ears of; this capacityand was recommended as standard in1004 by the Master Car Builders Asso-ciation. It was later modified and theweight increased to 625 lbs. in the year1909, upon the recommendation of ourassociation. This standard is shown inFig. 3. which represents the present standard.
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