368 INDEX. 



ART. PAGE 



Natural Elastic Limit 26 29 



Neutral Axis 68 93 



71 99 



Non-elastic Deformation, Hardening Effects of 27 30 



Properties of Iron and Steel 25 28 



Stress and Deformation 20 22 



Normal Stresses 14 12 



Notation Front . 



Oblique Loading 73 103 



Panel Length 120 215 



Loads 125 234 



" ' 127 236 



Panels Denned 120 215 



Parallel Forces 37 42 



Pettit Truss 123 224 



Pettit Truss Stresses 138 277 



Pier, Stresses in 109 178 



Pivot End Columns 112 185 



Plasticity 22 23 



Plate Girder Denned 2 



Lateral System, Deck 160 317 



' ' Through 161 318 



Portal 170 342 



Portal for Shallow Trusses . . 175 350 



Portal Knee Braced 174 348 



Poisson's Ratio 9 6 



78 118 



Pole 37 43 



Pony Truss 121 218 



Lateral Systems 161 318 



Portal Bracing 164 322 



Knee Braced 172 345 



Latticed 171 344 



for Shallow Trusses 175 350 



Plate Girder 170 342 



for Shallow Trusses 174 348 



" with Knee Braces 174 347 



Posts Fixed at Both Ends 165 324 



Posts Fixed at Top, Partially Fixed at Bottom. . .- . 166 329 



Posts Partially Fixed at Both Ends 167 332 



Simple X Bracing 169 335 



Stresses in 168 334 



Position of Load for Maximum Moment 100 164 



" " " 101 165 



" " 128 239 



" " " . 144 289 



