Some sets of refractory bricks, i'm afraid I have no idea why they built in such a way.
It looks like they go on the sides of the furnace at a high level.
http://www.aditnow.co.uk/Photo/Reline-2000_105186/
Copy & Paste Forum Code
To display this photograph in a forum message please copy the text below and paste it into your forum message:
[photo]105189[/photo]
To display this photograph in a forum message and link to the full size image please copy the text below and paste it into your forum message:
[link]105189[linkphoto]105189[/linkphoto][/link]