Reflecotrs on walls

hunglikeaflee

I was down off Lower Grand Canal Street last week; I think it was Eblana Villas. Can anyone tell me what all the little reflectors are on the walls of the houses along that street?

Thanks in advance.

Flee.

spurious

Looking at the street on Google Street view, I think they are ties to stop the walls bulging.

hunglikeaflee

Thanks for the reply but I know what you are talking about and that is not what I am talking about. I have had a look at street view and what I am talking about is not on it.
They look like small orange bicycle reflectors.

Gileadi

I have a feeling I know what these are but before I type a long winded explanation could say if they look anything like these?

http://hystrix.epomops.it/Wombat/udata/Iec_B1CE0D12/Unica_19A50E4A/Images/Target%202.jpg

hunglikeaflee

Gileadi wrote: »

I have a feeling I know what these are but before I type a long winded explanation could say if they look anything like these?

http://hystrix.epomops.it/Wombat/udata/Iec_B1CE0D12/Unica_19A50E4A/Images/Target%202.jpg

Thanks for the reply, no that is not them.

They are orange reflectors like you would see on bicycle wheels. They are inserted in a white plastic surround maybe 100- 150mm long which comes off the wall at a right angle. So the reflectors end up being perpendicular to the walls of the house. They run along the street but at different heights on each house.

oppenheimer1

They are retro-reflectors and are related to the plates tieing the building together most likely. A surveyor will come every so often to measure the distance to these reflectors from some known fixed point and it will tell him if the building is moving.

http://www.digitalmarketingblog.co.uk/2009/12/london-underground-fricking-laser-beams.html

You'll see the whole set up in Kings Cross St Pancras and Green Park stations on the northern line platforms in London (iirc). They have a piece of robotic kit that measures the tracks before each train passes to make sure the tracks haven't shifted.

hunglikeaflee

oppenheimer1 wrote: »

They are retro-reflectors and are related to the plates tieing the building together most likely. A surveyor will come every so often to measure the distance to these reflectors from some known fixed point and it will tell him if the building is moving.

http://www.digitalmarketingblog.co.uk/2009/12/london-underground-fricking-laser-beams.html

You'll see the whole set up in Kings Cross St Pancras and Green Park stations on the northern line platforms in London (iirc). They have a piece of robotic kit that measures the tracks before each train passes to make sure the tracks haven't shifted.

That sounds about right. Thanks for the reply.