. Tentative revised boiler safety orders. double shear, lb. per sq. in., as given in Par. 16c = crushing strength of mild steel, lb. per sq. in., as given in Par. 15n = number of rivets in single shear in a unit length of jointN = number of rivets in double shear in a unit length of joint 97 98 REPORT OF BOILER CODE COMMITTEE, 411 Example: Lap joint, longitudinal or circumferential, single-riveted. A = strength of solid plate = PXtXTS B = strength of plate beween rivet holes = (P—d)t X TS C=shearing strength of one rivet in single shear=nXsX<x D = crushing strength of plate in f
. Tentative revised boiler safety orders. double shear, lb. per sq. in., as given in Par. 16c = crushing strength of mild steel, lb. per sq. in., as given in Par. 15n = number of rivets in single shear in a unit length of jointN = number of rivets in double shear in a unit length of joint 97 98 REPORT OF BOILER CODE COMMITTEE, 411 Example: Lap joint, longitudinal or circumferential, single-riveted. A = strength of solid plate = PXtXTS B = strength of plate beween rivet holes = (P—d)t X TS C=shearing strength of one rivet in single shear=nXsX<x D = crushing strength of plate in front of one livet=dXtXc Divide B, C OT D (whichever is the least) by A, and the quotient will be the efficiency of a single-riveted lap joint as shown in Fig. 25. TAS=55,0001b. persg. = = l^m. = in. = sq. = 44,000 lb. per sq. in. c=95,0001b. persq. in.^ =,000=22,343B = (—) X55,000 = 12,890C = 1 X44,000 = 16,332i) =,000 = 16,328. Fig. 26 Example of Lap Joint, Longitudinalor circumfeeential, double-elveted 12,890 jB)22,343 (A) = of joint 412 Example: Lap joint, longitudinal or circumferential, double-riveted. A = strength of solid plate = PXtXTS B = strength of plate between rivet holes = (P—d) tXTS C=shearing strength of two rivets in single shear=nXsXa D = crushing strength of plate in front of two rivets=nXc?X<Xc Divide B, C ov D (whichever is the least) by A, and the quotient will be the efficiency of a double-riveted lap joint, as shown in Fig. 26. T/S=55, = ^ in. = ^ = % in. = sq. 44,000 lb. per sq. in. 36,523 (B)49,414 iA) c=95,000 lb. per sq. in.^=,000 = 49,414^ = (—),000=36,5230=2X44,,878D=,000=44,531 = = efficiency of joint APPENDIX 99 413 Example: Butt and double strap joint, double-riveted. A = strength o
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