Art. XXIII. — On the Lateral Stability of the Victoria- 

 street Bridge. 



By Professor Kernot. 



[Read 16th November, 1882.] 



Numerical Particulars Relative to the Victoria- 

 Street Bridge. 



TT • , . e ■, • i . f 86 feet from rock foundation. 



Height oi highest pier . . . < „. » , - , , . . 



& or ^ 74: reet from bed or river. 



Breadth of base, extreme ... 19 feet. 



Breadth to centres of cylinders 16 feet. # 



Weight of highest pier and \ 



corresponding portion of > 105 tons, 

 superstructure ... ... ) 



Moment of stability,105 x x ^- = 945 ft. tons. 



Overturning wind pressure ... 69 lbs. 



Moment of stability if provided /On up-stream side, 2625 ft. 



with additional cylinders J tons, 



on the down-stream side j On down-stream side, 1574 



only ... ... ... \ ft. tons. 



n . • • -, (North, 192 lbs. 



Overturning wind pressure ... < a .;':.-■„ 



° r (South, llo lbs. 



The Victoria-street bridge occupies a peculiarly difficult 

 site, one bank of the river being unusually high and the 

 other comparatively low. To overcome this extreme differ- 

 ence of level it was necessary to adopt an unusually high 

 bridge, and to place it upon a considerable slope. The funds 

 available being very limited, it was not possible to adopt 

 what may be called the heroic style of engineering, of which 

 we unfortunately have so many examples in this country. 

 The usual competition having been held a design was chosen/ 



