INDEX 



Pyramid, Volume of frus- 

 tum of rectangular, 54. 

 Volume of rectangular, 54. 



Q 



Quad bar, 255. 

 Quantitative mixer, 353. 

 Quantities for concrete, 



Table of, 244. 

 Fuller's rule for, 242. 



R 



Radius of circle, 50. 



of gyration, 142. 

 Rail, Properties and prin- 

 c i p a 1 dimensions of 

 standard, 166. 

 Ransome bar, 256. 

 bar, Table of properties of, 



256. 



mixer, 348. 

 Rate of loading testing 



machine, 220. 



Reactions for continuous 

 beams over equal spans, 

 119. 



on beams, 100. 

 Reciprocals, 30. 



Powers, roots, and, 31. 

 Rectangle, Area of, 51. 

 Rectangular concrete beam, 



291. 



pyramid, Surface of, 54. 

 pyramid, Surface of frus- 

 tum of, 54. 



pyramid, Volume of, 54. 

 pyramid, Volume of frus- 

 tum of, 54. 

 wooden posts, Table of 



constants for, 184. 

 Reduction of live loads from 



floor to floor, 86. 

 Regular polygons, 55. 

 Reinforced at top and bot- 

 tom, Concrete beam, 

 295. 



-concrete arches, 306. 

 -concrete beam, 290. 

 -concrete column, 302. 

 Reinforcement, B r a y t o n , 

 280. 



Reinforcement, Characteris- 

 tics 9f metallic, 252. 

 Cummings, 278. 

 denned, Parts of steel, 250. 

 Elements of steel, 248. 

 Empirical rules for 



straight column, 304. 

 Fabricated system of, 



277. 



Gabriel system of, 274. 

 Hooped column, 302, 305. 

 in column footings, Pla- 

 cing, 314. 



Kahn system of, 271. 

 Loose-rod system of, 269. 

 Merrick system of, 274. 

 Mushroom system of, 275. 

 of special construction, 



255. 



Pin-connected girder, 278. 

 Plain bar, 254. 

 Shear frame, 279. 

 Sheet-metal, 267. 

 Square- and triangular- 

 mesh wire, 268. 

 Straight column, 302. 

 Structural shapes used for 



steel, 263. 

 to resist lines of failure, 



251. 



Trussit, 267. 

 Types of steel, 254. 

 Unit system of, 277. 

 Visintini, 281. 



Reinforcing rods, Main, 250. 

 steel, Specifications for, 



368. 



Representation of a force, 87. 

 Rerolled bars, 254. 

 Resolution of forces, 91. 

 Restrained beams, 100. 

 Resultant moment, 95. 

 of several forces, 89. 

 Retempering of mortar, 206. 

 Rich lime, 193. 

 Ring, Area of, 52. 

 River sand, 197. 

 Rod, Longitudinal column, 



250. 



Main reinforcement, 250. 

 of special construction, 

 255. 



