EIVETED JOINTS 21 



141. Design a double-riveted lap joint for ^ 9 g inch plates and find 

 its efficiency. 



142. Design a double-riveted lap joint for |-inch plates and find its 

 efficiency. 



143. Design a single-riveted, two-strap butt joint for -^g-inch plates 

 and find its efficiency. 



144. Design a single-riveted, two-strap butt joint for -j^-inch plates 

 and find its efficiency. 



145. Design a double-riveted, two-strap butt joint for -^g-inch plates 

 and find its efficiency. 



146. Design a double-riveted, two-strap butt joint for ^g-inch plates 

 and find its efficiency. 



147. Determine the efficiency of a triple-riveted, two-strap butt 

 joint in which t = T 5 g- inch, d = | inch, and p = 6| inches. 



148. Find the efficiency of a triple-riveted, two-strap butt joint in 

 which t = J- inch, d = 1 inch, and p = 7 J inches. 



149. Calculate the efficiency of a triple-riveted, two-strap butt 

 joint in which t = -f^ inch, d = 1-Jg- inches, and p = 7f inches. 



150. Design a triple-riveted, two-strap butt joint for ^-inch plates 

 and find its efficiency. 



151. Design a triple-riveted, two-strap butt joint for |-inch plates 

 and find its efficiency. 



152. Show that when s t , s s , and s c have values as given above, if 



m = n and K= 1.5 for t < 0.313 inch, then P c < P.. 



153. Show that if 5 m = 9 n (Fig. 9), and K= 1.3, 



for t > 0.76 inch, then P c < P 8 . 



154. Show that if m = 2 n and K= 1.3 



for t > 0.94 inch, then P c < P.. 



155. A boiler shell 4 feet in diameter has longitudinal single-riveted 

 lap joints for which t = T 5 g inch, d = i| inch, and p = 2 -Jg- inches. 

 Determine the maximum steam pressure which can be used with a 

 factor of safety of 5. 



156. A boiler shell 60 inches in diameter has longitudinal single- 

 riveted lap joints for which t = | inch, d = l| inch, and p = 2 T 3 g 

 inches. Calculate the maximum steam pressure which can be used 

 with a factor of safety of 5. 



