166 



STEEL RAILWAY BRIDGES. 



CHAP. IV. 



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IS 



155 



1=5 



155 



115 



155 



155 



155 



155 





S V) 



II 



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Bi 



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 each li 

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t 

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n 

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ee 

 me 



y w 

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 of th 

 heel 

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