Vince Pitelka on fri 17 sep 04
> At EMU we are building a train style wood kiln. We
> are now to the point of framing the bricks with angle
> iron and are in a bit of a quandry. It is suggested
> that we use 2" angle iron, but no specifications are
> given as to the thickness. I am guessing 1/8", but
> would really like to know if this is heavy enough.
Jacob -
1/8' might seem adequate now, but keep in mind that you have no way to
protect the inside surface from corrosion. 1/8" stock will degrade fairly
quickly, while 1/4" will last far longer. It might seem like overkill right
now, but you will never regret it in the future. And actually, for a kiln
frame, I think that 1/4x2" angle is rather light. I usually use 1/4x3", and
on doors and very high-strength areas I use 1/4x4". But I have always
tended to build things very sturdy.
- Vince
Vince Pitelka
Appalachian Center for Craft, Tennessee Technological University
Smithville TN 37166, 615/597-6801 x111
vpitelka@dtccom.net, wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/
Jacob Runyan on fri 17 sep 04
Hi,
At EMU we are building a train style wood kiln. We
are now to the point of framing the bricks with angle
iron and are in a bit of a quandry. It is suggested
that we use 2" angle iron, but no specifications are
given as to the thickness. I am guessing 1/8", but
would really like to know if this is heavy enough.
Just wondering what everyone else has used on their
kiln. 1/4 seems pretty thick, but just wanted to make
sure before we order the steel on monday.
Thanks for your help,
Jacob Runyan
Eastern Michigan University
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pdp1@EARTHLINK.NET on fri 17 sep 04
Hi Jacob,
If it were me...if this Kiln is larger than say your average
refridgerator, then I'd elect 3/16ths X 2-1/2 Angle Iron,
and, also, Rivet the entire frame together with round-head
1/4 inch, ductile Iron Rivets.
'Paint' the whole frame with Linseed Oil, which will mostly
cook off, but would likely leave a nice pretective coating
as would lessen otherwise impending corrosions...
It would endure for Centuries that way, with never a cracked
or unsightly 'weld'...
Phil
el ve
----- Original Message -----
From: "Jacob Runyan"
> Hi,
>
> At EMU we are building a train style wood kiln. We
> are now to the point of framing the bricks with angle
> iron and are in a bit of a quandry. It is suggested
> that we use 2" angle iron, but no specifications are
> given as to the thickness. I am guessing 1/8", but
> would really like to know if this is heavy enough.
>
> Just wondering what everyone else has used on their
> kiln. 1/4 seems pretty thick, but just wanted to make
> sure before we order the steel on monday.
>
> Thanks for your help,
>
> Jacob Runyan
> Eastern Michigan University
Craig Clark on sat 18 sep 04
Jacob, while I haven't built a bazillion kilns I have constructed
three. ONe salt (80 cubic foot downdraft) and two smaller rduction boxes
that were/are standard soft brick construction updrafts. The raku kilns
don't really count for this discussion as far as I'm concerned. I have
built several of them using fiber.
The width of the angle iron that you decribe would be a bare minimum
as far as I'm concerned, especially in the kiln is going to have much of
an arch. This will in a large part be determined by the size of kiln
that you plan on building. Before you set about the task get yourself a
copy of "The Kiln Book" and read it cover to cover a few times. It
contains a wealth of information from a reknowed expert in the field.
Focus in on the basic cube design for effiency and ease of firing as a
starting point.
IN the case of deciding what thickness of angle do what Vince says
here. Use 1/4 inch.,,,,this is not the place to go for any of the mamby
pamby lighter wieght stuff. You want reall beef and stregth here! Think
of the kiln lasting for twenty plus years. This is the skeleton. Also,
go with the three inch around the doors and 4 inch just for that little
extra umph on the frame at the top where the force from the arch is.
Many kiilns have failed becasue of insuffiecient strength at the top
. THe walls are force out and the arch collapses. The only downside of
using the heavier material is that it weighs more and it will cost more
money. But.....in the long run you will be glad that you did.
Look at this one like kiln shed roofs. It may be easier, quicker and
cheaper to build one out of wood but there has been a number of fires
when the old wooden roofs catch on fire. This has happened to folks on
this list.
Hope this helps
Craig DUnn Clark
619 East 11 1/2 st
Houston, Texas 77008
(713)861-2083
mudman@hal-pc.org
Jacob Runyan on mon 20 sep 04
Thanks to all who have replied, both on and off list.
We will be ordering the steel tomorrow, hopefully have
everything ready for firing by next weekend.
Hopefully everything will go well.
Thanks again,
jacob runyan
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