CHAPTER XXIV. 
RECAPITULATION. 
Before closing this treatise it may be advisable to give a resume of the various 
P s to be taken by an engineer in designing and building a briclgo. They are as 
IO Uows : 〜 
し Ascertain as much as possible of the list of data in Chapter XVII., so as 
üo\v wliat kind of bridge is required, and what are tlie peculiarities of location 
la t may affect ita construction, 
• Determine the live load, dead load, number of panels, depth of truss, engine 
j ^ ess, wind pressure 011 each panel point of top and bottom chords when bridge 
8 botl : empty an d loaded. 
Fill out the table of data given in Chapter YIII. 
4 • Find stresses in trusses by method of Chapter YIII., recording them on a 
kelet ^ diagram. 
^ * Proportion main members of trusses recording dimensions on diagram, 
te 6 • Determine from the tables sizes of members of lateral systems, floor sys- 
’ Portal bracing and vertical sway bracing, and write them upon diagram. 
マ • Proportion pins and write their diameters on diagram. 
8 • Make out bills of materials, proportioniug the details as they come in order 
the list of memb ers. 
^ * Check dead load. 
0 。. Make estimate of cost. 
• Make working drawings. 
1 • Make order and shipping bills and send to manufacturer together with ex* 
^oo 011 ° f methods of marking iron. 
打 • Check all materials when received at site and pile them up in a convenient 
^ * Erect the bridge. 
