The elasticity and resistance of the materials of engineering . some experiments with small strips, incheslong and jV inch thick, cut across welded joints. These strips 644 PIN CONNECTION. Art. 75.] were taken out of boilers whose longitudinal joints had beenwelded. Twenty-three experiments with strips varying fromone to one and a half inches wide, gave the following resultsper square inch of plate section : WELDED. SOLID PLATE. Greatest 53,310 lbs 57,790 lbs. Mean 46,140 52,860 36,960 ... 46,370 The mean result is seen to be nearly 90 per cent, of thatofthe solid plate. Although
The elasticity and resistance of the materials of engineering . some experiments with small strips, incheslong and jV inch thick, cut across welded joints. These strips 644 PIN CONNECTION. Art. 75.] were taken out of boilers whose longitudinal joints had beenwelded. Twenty-three experiments with strips varying fromone to one and a half inches wide, gave the following resultsper square inch of plate section : WELDED. SOLID PLATE. Greatest 53,310 lbs 57,790 lbs. Mean 46,140 52,860 36,960 ... 46,370 The mean result is seen to be nearly 90 per cent, of thatofthe solid plate. Although the test specimens were altogether too small tobe of the greatest value, the results are most excellent. The value of a welded joint depends as well upon thenature of the material welded as upon the manipulation duringwelding. Art. 75.—Pin Connection. A pin connection consists of two sets of eye bars or links,through the heads at one end of each of which a single pinpasses. Fig. i shows a pin connection; A, A^ B, B, eyebars or links, and P is the The head of the eye bar (one is shown in elevation in ) requires the greatest care in its formation. It is imperfect Art. 75.] EYE BAR HEADS. 645 unless it be so proportioned that when the eye bar is tested tofailure, fracture will be as likely to take place in the body ofthe bar as in the head—in other words, unless its efficiency isunity. In Fig. 2 the head of the eye bar, or link, is supposed to beof the same thickness as that of the body of the bar whosewidth is w. ^
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Keywords: ., book, bookcentury1800, booksubjectbuildingmaterials, bookyear1883
