. Canadian engineer. g and flat plates is of tests were within 10% of the average ratio. 22% 16% 8% 8% !!),< between 10% and 20% of average and 30% 30% and ^0% 40% and 50% not within :io% 2. The average ratio for the tests made with the ball-and-socket bearing and the one-piece spherical bearingis 12% of tests were within !on of the average • between 10% and 20% of average ao!^ and 30% 18% -,0% and 40% 9% 40% and 50% 14% not within ^0% ()i4 THE CANADIAN ENGINEER Volume 30. J. Average unil (.-rushing strrntjih oblaincci from theplale tisls is !S,3
. Canadian engineer. g and flat plates is of tests were within 10% of the average ratio. 22% 16% 8% 8% !!),< between 10% and 20% of average and 30% 30% and ^0% 40% and 50% not within :io% 2. The average ratio for the tests made with the ball-and-socket bearing and the one-piece spherical bearingis 12% of tests were within !on of the average • between 10% and 20% of average ao!^ and 30% 18% -,0% and 40% 9% 40% and 50% 14% not within ^0% ()i4 THE CANADIAN ENGINEER Volume 30. J. Average unil (.-rushing strrntjih oblaincci from theplale tisls is !S,340 pounds per sc|iiarc iiicli. 1 he averageunit crushing stri-nglh obtained from the one-piece?ipherical bearing tests on tlie remaining halves of thesame bricks used in the Hat plate tests is 8,380 pounds per-qiiare inch. A. Flat plate tests—35% within 10% of average crushing •0% between lo^i and 20% of average crushing 20% and 30% 18% 30% and 40% 5% 40., and 5or, • 4% not within 50,. Fig. 1 = B.—Ball=and=Socket Bearing. B. One-piece sph>^rical bearing tests—9% within 10% of average crushing between 10% and- 20% of average crushing strength. 21% 20% and 30% 21% •• 30% and 40% ?• 16% • 40% and 50% • 87^ not within 50% 4. The average unit crushing strength obtained fromthe ball-and-socket tests is 9,340 pounds per square average unit crushing strength obtained from the one-piece spherical bearing tests on the remaining halves ofthe bricks used in the ball-and-socket tests is 8,760 poundsper square inch. .A. BaII-an<l-socket tests—26% within 10% of average crushing between 10% and 20% of average crushing •? 20% and 30% • 14% 30% and 40% • 10% 40% and 50% 11% not within 50% B. One-piece spherical tests--31% within 10% of average crushing between 10% and 20% of average crushing 20% and 30% ?• 13?^ 30% and 40% 5% •? 40% and 50% ?? 5% not within 50%
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