Subject: Plastering onto steel
From: (Frank Z)
Date: 30/07/03 21:04 GMT Daylight Time
Message-id:

On Wed, 30 Jul 2003 20:34:28 +0100, John Armstrong
wrote:

but presumably
if it expanded that much, it would also crack the masonry around it.


Thanks to both respondees. I'm not sure how much a 31" length of steel
will expand.

0.1mm per 10 degrees C


My guess is less than 0.5mm. To stop the masonry cracking
at each end of the lintel, I stuck some foam draught excluder onto
each end of the lintel so it will simply be compressing the foam, not
the masonry. I guess plaster will expand when hot too. With a bit of
luck, it'll expand the same amount as the steel

The CoE of metals is many times higher than that of building materials. The
data is freely available on the web.


- but that may still
not prevent cracks occurring.

Perhaps I'll follow Andrew's idea and stick something onto the lintel,
like brick tiles or something... not sure...


Dave Baker - Puma Race Engines (www.pumaracing.co.uk)
"How's life Norm?"
"Not for the squeamish, Coach" (Cheers, 1982)