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Skeleton testing frame in a tunnel on the Northern line

Skeleton testing frame in a tunnel on the Northern line

Photograph
1923

The frame was used to check clearances in the tunnel during its enlargement, in what was then the City and South London Railway and is now part of the Northern line of the London Underground

Additional information

Reference
ID303
Image type
Photograph
Published
1923
Author
Collection
Photographic collection
Related keywords
City and South London Railway London Underground City South London Railway Northern Line Tunnel Enlargement Testing Frame Clearance Equipment Plant

Copyright

Source
OC 4532 Temple-Richards, H.B.: A method for testing tube tunnels for clearance while tunnels are in the course of construction, 1924
Credit
Institution of Civil Engineers

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