206 



RESISTANCE OF MATERIALS 



109. 

 110. 

 111. 



112. 



113. 



128. 



130. 

 131. 

 136. 

 166. 

 167. 

 168. 

 169. 

 170. 



171. 



173. 

 174. 

 175. 



205. 

 206. 

 207. 

 222. 



35,280 f t.-lb. 

 869,500 f t.-lb. 

 7 to 4. 



6 24 32 

 8 in. I, 20 J Ib. 



18.4 including weight of beam. 

 Tension = 2480 + 500 lb./in. 2 

 Compression = 4100 500 lb./in. 2 



114. 15-in. channels, 33 Ib. 



115. 1 to 12. 



116. Section modulus =24. 



117. 9 in. I, 21 Ib. 



118. 9 in. I, 25 Ib. 



119. 6in. 



16.3ft. 

 .192 in. 

 350 tons. 

 9 1 in. square. 

 5.82 in. 



123. 830 in.*; 

 2767 Ib./ft. 



124. 3967 Ib. 



125. 4i x | in. 



126. 28.1 Ib. 



127. Stress = 5170 lb./in. 2 



137. lOl^lb./ft. 2 



138. 12.68 ft. apart. 



139. .0373 in. 



156. Moment at wall = 1800 f t.-lb.; 



.D maximum = .0776 in. at 5.06 ft. 

 from free end. 



Rankine, 616 tons 



Johnson, 627 tons. 



Rankine, 268 tons 



Johnson, 267 tons. 



132 tons. 



15. 



2 1 in. square. 



d = 4.25 in. for stiffness ; 



d = 6.6 in. for strength. 



Minimum speed, 73 R. P. M. 



2500 lb./in. 2 



Shaft, 3 in. diameter. 



.13 in. 



5911 lb./in. 2 



176. 4-in. channels, 5 Jib.; 185. 20 in. I, 75 Ib. 

 plates, 6 x J in. 



177. Top plate, 10 x in.; 

 side plates, 8^ x ^ in.; 

 angles, 3 x 3 x ^ in. 



180. 3.4 in.; .9 in. 



181. 1= 17. Id. 



182. Diameters, 10^ and 



7^ in. 



183. About 3 in. 



184. 5 + . 



225. 



228. 



232. 

 233. 



236. 



241. 



2940 lb./in. 2 

 3333 lb./in. 2 

 Side, fa in.; 

 bottom, ^ in. 

 6528 lb./in. 2 



5880 lb./in. 2 



4ft. 



lin. 



2 in. 



4. 



3677 lb./in. 2 ; 



98.9 tons ; 



13,550 lb./in. 2 ; 



494.6in.-tons. 



1.25 in. 



221. 

 242. 2344 lb./in. 2 



244. 139 lb./in. 2 



245. .28 in. 



246. 17001b./ft. 2 



247. t= .108r. 



248. Flat, = 3. 16 in.; 

 hemispherical, =.7 in. 



250. 1.28 in. 



261. 70.8%: 52.4%. 



262. J-in. plates, 

 |-in. rivets, 

 3-in. pitch ; 



e = 75 to 78%. 



263. -in plates; 

 1-in. rivets, 

 5.2-in. pitch. 



264. 82. 5 lb./in. 2 



267. 476 lb./in. 2 



268. 4501b./in2. 



190. 43.24 in.-lb. 



192. 3.68 in. 



193. 5.63 in. 



194. 7. 114 in. 



195. 32 28'. 



196. 2JH.P. 



197. 4.465 in. 



200. 4484 H. P. 



201. 9.2 in. 



202. 32. 



208. p = 4235 lb./in. 2 ; 



209. E = 30,346,935 lb./in. 2 ; 

 G = 12,158,485 lb./in. 2 

 Jin. 



269. 7681b./ft. 



277. .3ft. 



279. 5 times load. 



WWW 



280. F= , , , 



281. F= 



2 



282. 1 to 18. 



284. W= 90478 ^neglect- 



ing friction. 



285. = ttn-i*H. 



sin a 



286. 463.2 Ib. 



288. Upper end, 13.61b.; 

 lower end, 76.2 Ib. 



289. 22flb.,63flb,63flb.; 

 50 Ib. 



290. 82 Ib. 



