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Kingston LaSalle Causeway - Ontario Region - PSPC

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The LaSalle Causeway links downtown Kingston to Pittsburgh near the mouth of the Cataraqui River. It was built in 1917 replacing the 1829 'Penny Bridge', a wooden toll bridge with a swing section to allow passage of marine vessels.

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Lifting Mechanism
                                                                                                                  
One or more trunnions are mounted on supports within the
pier.
                                    
A counterweight is constructed and placed inside the pier.
                                               
Gear drives and/or hydraulic lift mechanisms are installed
in the pier.
                      
Two side girders are constructed for the heel section of
each leaf of the bridge. A trunnion bearing is mounted in an opening in each
girder. The girder may be equipped with gears that will mesh with the lift
mechanism, or it may be fitted with paddles that hydraulic rams can push
against.

The two side girders are lifted into the pier and eased over
the ends of the trunnion. The heel section is completed with a crossbeam
connecting the two side girders. The counterweight is attached to the heel
section.

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Lifting Mechanism
                                                                                                                  
One or more trunnions are mounted on supports within the
pier.
                                    
A counterweight is constructed and placed inside the pier.
                                               
Gear drives and/or hydraulic lift mechanisms are installed
in the pier.
                      
Two side girders are constructed for the heel section of
each leaf of the bridge. A trunnion bearing is mounted in an opening in each
girder. The girder may be equipped with gears that will mesh with the lift
mechanism, or it may be fitted with paddles that hydraulic rams can push
against.

The two side girders are lifted into the pier and eased over
the ends of the trunnion. The heel section is completed with a crossbeam
connecting the two side girders. The counterweight is attached to the heel
section.

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Structure Type:

Metal 8 Panel Rivet-Connected Warren Through Truss, Movable:
Single Leaf Bascule (Heel Trunnion)                     

Construction Date and Builder / Engineer:

1917 By Builder/Contractor: Unknown   and Engineer/Design: 
Strauss Bascule Bridge Company (Strauss Engineering Company) of Chicago,
Illinois.
                                                      
Main Span Length:

 170 Feet (51.8
Meters) 

Structure Length:

 212 Feet (64.6
Meters) 

Roadway Width:

 24 Feet (7.3 Meters)          

Spans:
2 Main Span(s)

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Structure Type:

Metal 8 Panel Rivet-Connected Warren Through Truss, Movable:
Single Leaf Bascule (Heel Trunnion)                     

Construction Date and Builder / Engineer:

1917 By Builder/Contractor: Unknown   and Engineer/Design: 
Strauss Bascule Bridge Company (Strauss Engineering Company) of Chicago,
Illinois.
                                                      
Main Span Length:

 170 Feet (51.8
Meters) 

Structure Length:

 212 Feet (64.6
Meters) 

Roadway Width:

 24 Feet (7.3 Meters)          

Spans:
2 Main Span(s)

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The bridge
can hold up to 18 tonnes of weight at one time.

 
                  
Maximum
angle of the bascule is 86 degrees

                                                  

Total length
of the bridge in 800 feet/286.5 metres

 
                                   
The width of
the bridge is 18.3 metres

 

The height
of each tower is 65 metres/213 feet
                                     
 

Iron boxes
were sunk 6.5 metres into the bed of the rivers made of solid concrete.
                                    
 

Materials
Steel clad in granite and stone masonry

 
                          
Building
time 1886 – 1896
                  
 

The cost of
the bridge was £1,184, 000


Height above
water  

 
                          
The bridge
in raised over 1000 times a year

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The bridge
can hold up to 18 tonnes of weight at one time.

 
                  
Maximum
angle of the bascule is 86 degrees

                                                  

Total length
of the bridge in 800 feet/286.5 metres

 
                                   
The width of
the bridge is 18.3 metres

 

The height
of each tower is 65 metres/213 feet
                                     
 

Iron boxes
were sunk 6.5 metres into the bed of the rivers made of solid concrete.
                                    
 

Materials
Steel clad in granite and stone masonry

 
                          
Building
time 1886 – 1896
                  
 

The cost of
the bridge was £1,184, 000


Height above
water  

 
                          
The bridge
in raised over 1000 times a year

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The central span of 200 feet (61 metres) between the towers is split into two equal bascules or leaves, which can be raised to an angle of 86 degrees to allow river traffic to pass.

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﻿The trunnion bascule lift bridge was designed by the American engineer, Joe Strauss, a pioneer of lift bridge design. Completed in 1916, it is a single leaf lift span made of a steel girder truss balancing on a trunnion pivoting against a concrete counterweight.

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﻿The trunnion bascule lift bridge was designed by the American engineer, Joe Strauss, a pioneer of lift bridge design. Completed in 1916, it is a single leaf lift span made of a steel girder truss balancing on a trunnion pivoting against a concrete counterweight.