INDEX 



Smith mixer, 349. 

 Snow and wind load, 81. 



load, 56. 



Socket, Beam, 328. 

 Bigelow, 328. 

 Jennings-Steinmetz, 328. 

 Sheet-steel, 330. 

 Unit, 328. 



Soft, or mild, steel, 252. 

 Soil, Bearing value of a 



foundation, 311, 313. 

 Soundness, Accelerated tests 



for, 360. 



Results of tests for, 215. 

 Tests for, 210. 

 Span, Definition of, 99. 

 Spandrel and lintel construc- 

 tion, 322. 

 wall forms, 341. 

 Spans, Bending moment for 

 continuous beams over 

 equal, 120. 



Reactions for continuous 



beams over equal, 119. 



Special construction, Bars of, 



255. 



Specific-gravity tests, Appa- 

 ratus for, 225. 

 gravity, Tests for, 225. 

 -gravity tests, Method of 



making, 226. 

 Specifications for aggregates, 



368. 



for cement, 227, 367. 

 for concrete, 367. 

 for floor and test load, 



368. 



for reinforcing steel, 368. 

 for waterproofing, B a r- 



rett, 345. 

 Sphere, Surface of, 53. 



Volume of, 53. 

 Spiral bar, 256. 



Length of, 54. ' 

 Splice rod, 250. 

 Spread footing for outside 



columns, 315. 

 footings, 314. 



Square and round bars, 

 Weights and areas of, 

 253. 

 measure, 2. 



Square measure, Surveyor's, 



2. 

 -mesh wire reinforcement, 



268. 



root, 26. 



-twisted bars, 256. 

 -twisted lug bar, 257. 

 wooden posts, Table of 



constants for, 184. 

 Squares and cubes, 28. 

 Staff bar, 255. 

 Standard angles having 



equal legs, Properties 



of, 154. 

 angles having unequal 



legs, Properties of, 158. 

 channels, Properties of, 



151. 

 connections to cast-iron 



columns, Dimensions of, 



190. 

 I beams, Properties of, 



148. 

 rolled sections, Values for, 



136. 



rolled steel shapes, Prop- 

 erties of, 146. 

 T rails, Properties and 



principal dimensions of, 



166. 



Starting and managing boil- 

 ers, Instructions for, 



355. 

 and operating a mixer, 



356. 



Steam test, 214. 

 Stearate, Waterproofing 



with metallic, 344. 

 Steel angles, haying equal 



legs, Properties of, 154. 

 angles having unequal 



legs, Properties of, 158. 

 bar, Monolith, 262. 

 channels, Properties of, 



151. 



High carbon, 252. 

 I beams, Properties of , 148. 

 Laws for, 361. 

 Medium, 252. 

 Plain bar, 254. 

 reinforcement, Character- 

 istics of, 252. 



