Skip to Main Content

Skeleton testing frame in a tunnel on the Northern line


Skeleton testing frame in a tunnel on the Northern line


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



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

Unless otherwise credited, all the images on this site are © Institution of Civil Engineers. Please note we do not permit the publication of low resolution images copied from our website.

Our friendly and experienced team in the ICE Lbrary can provide a range of photographic material to suit your requirements. We do receive a large volume of requests but will endeavour to respond as soon as possible.


Request high-res image

Request high-res image by completing this form, please state your intended use (personal or commercial) as this will affect the reproduction fee.