CHAPTER VII. 

 RIVETING. 



IN structural metal-work, the usual method of uniting 

 " plates " or of connecting " shapes " is by riveting. 



The riveted joint is technically termed a " lap-joint " when 

 one plate overlaps the other. It is a " butt-joint" when the 

 two plates are brought together, their edges in contact, and 

 the plates fastened by the use of a cover-strip or " welt," 

 which overlaps both plates ; when two such cover-strips are 

 used, the one on the outside and the other on the inside of 

 the two plates in contact, the joint is termed a " double-welt 

 butt-joint." 



Such joints are further distinguished as being "single- 

 riveted" when a single row of rivets is used as fasteners for 

 the two plates. It is a "double-riveted joint" when two 

 rows of rivets are used; so, also, "triple-riveted" and 

 "quadruple-riveted" when three and four rows respectively 

 are used as fasteners; thus, a "triple-riveted, double-welt 

 butt-joint " is one where three rows of rivets are used in 

 making a joint between two plates, covered inside and out 

 with covering-strips or "welts." 



In the correspondence columns of the Engineering News, 

 Mr. Freeman C. Coffin, M. Am. Soc. C. E., in discussing 

 " Specifications for Stand-pipes," and referring to the charac- 

 ter of joint, suggests some points where there is room for 

 improvement. He writes as follows: " One is the method of 



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