— 255 二 
^ l， oportioning of bottom chords, 115,121,157, 
J 58. 
^opo r ti on i n g Q f bottom chord struts, 121, 15?. 
roporticming of brackets, 143, 208. 
^portioning of chord bars, 115, 157. 
^portioning of coun t,ers, 115, 157. 
^portioning of details, 139. 
loportioning of expansion rollers, 171. 
/oportioning of falsework, 225. 
r °portioniug of floor beam connection to 
stringers, 125. 
^portioning of floor beams, 124. 
^oportioning of floor system, 122. 
^portioning of hip connection, 140, 168, 204. 
ro portiouing of intermediate strut connection, 
!4し 172, 2〇5, 
^oportioninn, 0 f intermediate struts, 121, J63. 
^portioning of knee braces or knees, 143, 
ぐ！ ^rtionin ぱ of lateral rods, 116, 163. 
^portioning of lateral strut connection, 141, 
ベ 0 !) ortioning of lateral struts, 120, 163. 
^oportionm<y of lateral systems, 116, 120, 163. 
°Poitioniug of lower ends of ix>sts, 141, 172, 
メ 04. • 
^ropo r ti on j n g i 0W0r ] a ( era i struts, 120, 163. 
^^oportioni n g of main truss members, 115, 155. 
t» P 0r t^>ning of middle of post connection, 205 . 
oport:o n i n g of pins ' [ 巧， 心， 心 . 
P ro ^° r ^!° n ^ n ^ Plate girders, i22_ 
P°rtioning of portal strut connection, 14a, 
p 】74, 206. 
P«^° l ^ 0nin ^ portal struts, 120, 163. 
^ Portioning of posts# I20f , 59 , 
^ °Portioning of rolled beams, 122. 
POl，Uon | n ? of rollers, i 7 r, ao8. 
? ro!!n l !- 0rilUg ° f shoes , MO, 丨 70, 204. 
Pro ° n ! n ° 0f side facing, 205. 
0 f stringer connection to floor 
Pro ?* I25 * 
P ro ^° mng Gf _y bracing， 116, 163. 
2〇斗 lonin ^ of top chord connection, 140, 168, 
ho ミコぐ 01111 ^ 0 f ㈣ chords , 加, 158. 
Prop 0rt !° n ! Ug of track stringers, 126. 
10nin S of upper end of post connection, 
. 
j- . ^ on ^ n f? of upper lateral strut connec. _ 
IXW 二 ;:“ 0 up P er later al struts, 120, 
10nin ? vibration rods, 116, 163. 
Quadrangular truss, 8, 52. 
Quality of workmanship, 78. 
Eailsj 60, 83, 182. 
Raising gang, 221. 
Katio of width to depth of bars, 53, 13 r. 
Recapitulation, 103, ^39. 
Recording of measurements, 189, 197, 200. 
Reduction of ends of pins, 56, 134. 
Regularity of rivet spacing, 74, 128, 147, 190. 
Reinforcing plates, 54, 73, 1 39, 168, 170, 204, 
205. 
Ec-railing apparatus, 60, 77. 
Resistance of cars to overturning, 83. 
Rivet heads, 49, 78. Table XIX. 
Rivets, bill of, 215,218. 
Rivets, countersunk, 114, 190. 
Rivets, diameters of, 72, 74, 113. 
Rivets in flaugeä of beams, 74, 127. 
Rivets, bending moiAents <&c. for. Table 
XVIII. 
Rivet spacing, 74, 128, 147, 190. 
Rivetting, field, 5, 77, 114, 147. 
Ri vetting, rules for, 73, 113. 
Roadway, clear, 65. 
Rods, equivalent lengths for upset ends Ac. , 
149. 
Roller plates, 54, 73, 141» 174, 206. 
Rollers, 55, 66, 76, 171, 208. 
Round Oak Iron Works, 22. 
Rounds, sections of, 18, 19, 22, 44. 
Rounds, weights of, 44. 
Rules for ri vetting, 73, 113. 
Scales, 182. 
Screw threads, 71, 193. 
Sections, limiting sizes of, 66. 
Sections of angle irons, 14, 18, 19, 21, 24,15, 
31, 33 , 34 , $6. 
Sections of channels, 15, 16, 17, 19, 20,28,30, 
33 , 34 , 35 * Table XVI. 
Sections of flats, 18, 19, 22, 40. 
Sections of I beams, 16, 17, 19, 2, 2,2 5, 26, 29, 
3 % 54 » 35 - 
Sections of members, 5a, 53, 69. 
Sections of rounds, 18, 19, 22, 44. 
Sections of square bars, 18, 19, 22, 44. 
Sections of tees, 19, 23, 27, 32, 53, 34* 3 ^* 
Semi-transparent drawing paper, 199. 
Shape iron, addresses of manufacturers of, 13 » 
14, 16, 17, 18, 19, ao, 22, 25,29, H ， 54, 35 . 
Shearing stress ， こ 74, ill, 122, 129, 132 ， 153. 
