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Just before the riveters complete the riveting of the portal, the first of the upper 
lateral and intermediate struts should be run out, and put into place ; but the upper 
lateral and vibration rods should be omitted, as they would bo in the way of tlie 
riveters, and can be readily inserted afterwards. 
As the chord bars will be in the way of tho rivetters when connecting tlie lower 
chord struts, tlie latter can be temporarily removed by withdrawing the pin む〇瓜 
tlios0 oil one side of the strut at the panel point where the connection is to be made 
and hoisting the bars out of tlie way until the connecting plate on that side is atta. 
ched, then putting them into place again, and repeating the same operation on the 
other side of the strut At these panel points it might be well to use wooden p^ s 
until the strut connection is mado. 
About tlie time that one-half the span is erected, commence running out 
lower lateral struts and rods, putting thorn into place, inserting tho liip verticals and 
fillers, and coupling the lower chords into tlieir final position, leaving the beam 
hangers lying horizontally, so that, when tlie longitudinal supporting-timbers 
removed, they will drop into tlieir proper places. 
A little before the riveters reach the end of tho span, the upper lateral and 
vibration rods should be put into place, and screwed up about tlie right amount. 
When the end of the bridge is reached by the riveters, *the last couplings of the 
bottom chords can be made at tho pedestals. 
The shoes rest upon the rollers, which should Lave been put in exactly trans- 
verse to the direction of the bridge, and blocked so that they cannot move. 
Tlie last connection for each truss can be easily made by raising the liip either 
■with levers or by jack-screws, and either pressing against the shoe with jack-screws 
abutting against blocks cliained to the roller plate, or by attaching a pair of blocks 
to the pedestal and first panel point lower chord pin. 
After the final coupling lias been made, and tlie riveting is finished， knock 
tlie upper chord camber blocks, so as to bring all tlio weight of the upper part 
tlie bridge upon tlie posts ; then take down tlie upper falsework. 
Next knock out the camber blocks of the lower chords, lowering them together 
gradually so as to bring no shock upon the bridge, and remove tlie beams that sup - 
ported the trusses. 
The arrangement of the cambro blocks will generally have left sufficient lio^ a " 
way between the lower lateral struts and the runway to allow the floor beams and 
track stringers upon timber trucks to pass between ； but if not it will be very 妙 印 
to construct a new runway by blocking up tlie middle of each lower lateral strut 
from the old runway and laying a line of planks from strut to strut : should the plaok® 
spring too much, they can be blocked up at their middle points. 
Next run out the end track stringers with their bed plates and bracing fra 位 
and leave them on the pier, then bring on the end floor beam, and take up as 
of the runway as is necessary to get it into place. It should be lowered beneath th 0 
ends of the hangers then raised into place, after which the filling plates should be 
placed on top, the hanger plates below and the nuts screwed up tightly and locked 
Now gefc the end stringers into place, removing the runway and inserting the braci^ 
