Donovan Palmquist on mon 23 jul 12
Jon,
For the most part you do not have to leave expansion joints in a kiln tha=
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t small.
I have found that the inconsistencies in sizes of brick are common....I u=
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sually=3D20
lay brick to a specific dimension such as a base with the dimension 45 x =
=3D
63 and=3D20
stay with that dimension throughout the kiln. I will either cut off long=
=3D
brick or=3D20
fill with slices of brick. The floor tends to be loose enough anyway so =
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leaving=3D20
expansion joints only makes the movement worse. I have also found that=3D2=
0=3D
certain brick when fired to c.10 will actually shrink some more from thei=
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r=3D20
original firing at the plant. This gives you even more expansion joints =
=3D
than you=3D20
want. Hope this helps.
Best,
Donovan
jonathan byler on mon 23 jul 12
Thanks! kiln had some issues with expansion, but I think it was more
that I didn't frame it in adequately. I am using thicker, stronger
angle iron this time, and welding it with the mig welder. last time i
was fighting with an acetylene torch at awkward angles. now we have a
long enough extension cord and a place to plug it in closer to where
the kilns are.
-jon byler
On Jul 23, 2012, at 5:22 PM, Donovan Palmquist wrote:
> Jon,
> For the most part you do not have to leave expansion joints in a
> kiln that small.
> I have found that the inconsistencies in sizes of brick are
> common....I usually
> lay brick to a specific dimension such as a base with the dimension
> 45 x 63 and
> stay with that dimension throughout the kiln. I will either cut off
> long brick or
> fill with slices of brick. The floor tends to be loose enough
> anyway so leaving
> expansion joints only makes the movement worse. I have also found
> that
> certain brick when fired to c.10 will actually shrink some more from
> their
> original firing at the plant. This gives you even more expansion
> joints than you
> want. Hope this helps.
>
> Best,
> Donovan
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