Friday 8 July 2011

Clips in Crick Tunnel - what are they?


On the walls (wall?) of Crick Tunnel (and, possibly, in other tunnels as well, but I noticed them in Crick) are several metal clips screwed to the brickwork.


I assume they are something to do with maintenance, but they seem to be at strange, random, angles.



Anyone know what they are?

4 comments:

Bruce in Sanity said...

There used to be arrows made out of three tubes of self fluorescent stuff in a glass fronted case mounted in all these tunnels, but they've mostly been nicked.

I wonder if these are the clips that held them to the wall?

Cheers

Bruce

Halfie said...

Thanks Bruce, yes, that sounds likely. There's a bit of green in the clip in the fourth photo.

Anonymous said...

These are tell-tales, they get fixed across a crack, if the crack shifts, the glass breaks and it is known that the crack is moving.

Halfie said...

Anonymous, they appear to be just metal, no glass - neither do they look as though they're fixed across cracks. Unless that bit of green in the fourth photo is the glass telltale and all the others have broken ...