. American engineer and railroad journal . at the increasefor double over single shear averages considerably higher iniron rivets than it does in steel rivets; also that the increaseis greater for machine driven rivets than for hand driven, thisbeing attributed to the frictional resistance of the plates,which is not so effective in the hand work: Per Increase double One square over single. Xo of Diameter. A rivet. inch. Per test. Kind. Shear. Inch. Inch. Pounds. Pounds. 1 Iron Single 13-16 0 5184 22,190 42,824 . . ) Hand 2 Iron Double 13-16 42,240 90 ( driven. 3 Iron Single 13-16
. American engineer and railroad journal . at the increasefor double over single shear averages considerably higher iniron rivets than it does in steel rivets; also that the increaseis greater for machine driven rivets than for hand driven, thisbeing attributed to the frictional resistance of the plates,which is not so effective in the hand work: Per Increase double One square over single. Xo of Diameter. A rivet. inch. Per test. Kind. Shear. Inch. Inch. Pounds. Pounds. 1 Iron Single 13-16 0 5184 22,190 42,824 . . ) Hand 2 Iron Double 13-16 42,240 90 ( driven. 3 Iron Single 13-16 20,430 39,409 . . ] Machine 4 Iron Double 13-16 40,920 78,934 104 1 driven. 5 Steel Single 13-16 49,845 ... 7 Machine 6 Steel Double 13-16 46,575 89,843 SO f . j Hand 7 Steel Single 13-16 0 5184 49,845 8 Steel Double 13-16 84,500 69 J driven. We next prepared a triple rii •eted butt strap joint, using %-in. plates with i-in. rivets (iron) in 13-16-in. drilled holes,. tests previously described to ascertain the shearing strengthof the rivets. The shearing strength of rivets we find to be about as fol-lows : For riveted plates : Pounds. Iron rivets, single shear, average per square inch 40,000 Iron rivets, double shear, average per square inch 78,000 Steel rivets, single shear, average per square inch 49,000 Steel rivets, double shear, average per square inch 84,000 In addition to invite your attention to the follow-ing points of interest: 1. The noticeably greater increase for iron rivets in doubleshear over their single shearing strength, as compared to steelrivets in double shear over their single shearing strength. 2. The greater increase for machine driven rivets in doubleshear over hand driven rivets: hand driven not to be ham-mered after getting cool. 3. The apparent necessity for deciding on a new constant inplace of for calculating the distance from center of holesto edge of plate for rivets
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
