254 INDEX 



Rods (see steel') 



Sand, broken stone screenings, 4 



clay in, 4 



gravel screenings, 4 



loam in, 4 



requirements, 2 



sharp, 2 



sieve analysis of, 3, 4 



size of grains, 2, 3 



specifications, 4 



with rounded grains, 2 

 Shear, in homogeneous beams, 39-41 



in reinforced concrete beams, 63, 65, 75, 86, (see also diagonal tension) 

 Shrinkage and temperature stresses, 36, 37 

 Slabs, 135-140 

 Steel, advantage of combining with concrete, 26, 27 



bending test, 24 



bond with concrete, 27-29 



coefficient of expansion, 24 



concrete as a protector against corrosion, 21, 22 



deformed bars, 22, 23, 27 



general requirements, 22 



loss of strength from overheating, 20, 26 



medium vs. high, 22-24 



modulus of elasticity, 24, 29-31 



open-hearth vs. Bessemer, 24 



tensile strength, 24 



transverse spacing of reinforcement, 107-109 



wire, 22, 25 

 Stirrups, 93-98 



combined with bent rods, 103-105 

 Stone, crushed, 4 



gravel, 5, 6 



maximum size of, 5 



quality required, 4, 5 



sieve analysis of, 5 



Tables (see Table of Contents) 

 Tests, beam, 74-84, 146, 157 



column, 175-183 

 T-beams, conditions met with in design, 152, 153 



design of, 143-146 



diagrams, 233, 234 



economical proportions of, 151, 152 



tables, 202-207 



tests, 146 



Vertical and inclined reinforcement, 90-93 

 Vertical stirrups (see stirrups) 



Waterproofing qualities, 20, 21 



Web, reinforcement, 68-71 (see also stirrups and bent rods) 



Wire, 22, 25 



Working stresses, 84-89, 184, 185 



