Bruce Girrell on sat 25 oct 08
Fred Olsen shows the dimensions of a No. 1 arch brick as 4 1/2 x 2 1/2 x 2 =
1/8
But he shows that the width reduction is all taken from one side of the bri=
ck, that is, two of the angles remain right angles. I would have expected t=
hat the width would be reduced symmetrically, yet I can understand that it =
may be easier to manufacture the asymmetric brick that Olsen shows.
So, does a No 1 arch brick go like this
_______________
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| /
| /
| /
| /
| /
| /
-----------
or like this?
_______________
\ /
\ /
\ /
\ /
\ /
\ /
\ /
----------
Thanks,
Bruce Girrell
Loren JOnes on sat 25 oct 08
The second illustration is correct.
________________________________
From: Bruce Girrell
To: CLAYART@LSV.CERAMICS.ORG
Sent: Saturday, October 25, 2008 9:34:14 AM
Subject: Arch brick dimensions
Fred Olsen shows the dimensions of a No. 1 arch brick as 4 1/2 x 2 1/2 x 2 1/8
But he shows that the width reduction is all taken from one side of the brick, that is, two of the angles remain right angles. I would have expected that the width would be reduced symmetrically, yet I can understand that it may be easier to manufacture the asymmetric brick that Olsen shows.
So, does a No 1 arch brick go like this
_______________
| /
| /
| /
| /
| /
| /
| /
-----------
or like this?
_______________
\ /
\ /
\ /
\ /
\ /
\ /
\ /
----------
Thanks,
Bruce Girrell
Gail Galusky on sat 25 oct 08
Tim Frederich sez 'the second way, both sides angled', i.e., centrally tapered.
Gail G., Indy
-------------- Original message from Bruce Girrell : --------------
> Fred Olsen shows the dimensions of a No. 1 arch brick as 4 1/2 x 2 1/2 x 2 1/8 But he shows that the width reduction is all taken from one side of the brick, that is, two of the angles remain right angles. I would have expected that the width would be reduced symmetrically, yet I can understand that it may be easier
> to manufacture the asymmetric brick that Olsen shows.
>
> So, does a No 1 arch brick go like this
>
> _______________
> | /
> | /
> | /
> | /
> | /
> | /
> | /
> -----------
>
> or like this?
>
>
> _______________
> \ /
> \ /
> \ /
> \ /
> \ /
> \ /
> \ /
> ----------
>
> Thanks,
>
> Bruce Girrell
Paul Herman on sat 25 oct 08
Bruce,
They are like the second example, balanced.
best,
Paul Herman
Great Basin Pottery
Doyle, California US
www.greatbasinpottery.com/
On Oct 25, 2008, at 8:34 AM, Bruce Girrell wrote:
> Fred Olsen shows the dimensions of a No. 1 arch brick as 4 1/2 x 2
> 1/2 x 2 1/8
> But he shows that the width reduction is all taken from one side of
> the brick, that is, two of the angles remain right angles. I would
> have expected that the width would be reduced symmetrically, yet I
> can understand that it may be easier to manufacture the asymmetric
> brick that Olsen shows.
>
> So, does a No 1 arch brick go like this
>
> _______________
> | /
> | /
> | /
> | /
> | /
> | /
> | /
> -----------
>
> or like this?
>
>
> _______________
> \ /
> \ /
> \ /
> \ /
> \ /
> \ /
> \ /
> ----------
>
> Thanks,
>
> Bruce Girrell
Michael Wendt on sat 25 oct 08
Bruce,
I just checked the Yukon W1 I have.
It is like your second example, symmetric
about the center line.
Dimensions:
9" L X 4 1/2" W X 2 1/2" Thick on the wide end
by 1 3/4" on the narrow end.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave.
Lewiston, Id 83501
U.S.A.
208-746-3724
wendtpot@lewiston.com
http://www.wendtpottery.com
http://UniquePorcelainDesigns.com
Bruce wrote:
Fred Olsen shows the dimensions of a No. 1 arch brick
as 4 1/2 x 2 1/2 x 2 1/8
But he shows that the width reduction is all taken from
one side of the brick, that is, two of the angles
remain right angles. I would have expected that the
width would be reduced symmetrically, yet I can
understand that it may be easier to manufacture the
asymmetric brick that Olsen shows.
So, does a No 1 arch brick go like this
_______________
| /
| /
| /
| /
| /
| /
| /
-----------
or like this?
_______________
\ /
\ /
\ /
\ /
\ /
\ /
\ /
----------
Thanks,
Bruce Girrell
jonathan byler on mon 27 oct 08
Bruce,
as far as I can tell, all arch bricks have symmetrical tapers on both
sides. They make bricks tapered on one side that are called skews.
these are used to support the arch at the ends, and are available in
a variety of angles for different arch shapes. you can also buy
wedges (tapered along the 9" side) and just about any other form you
can imagine.
#1 Arch refers more to the taper of the brick than anything else. I
have 3 different sizes of #1 arch brick sitting next to me right
now. all of them are nominally 4-1/2" tall x 9" long, although 1
batch of them is 1/16" longer in both dimensions, while the other two
are about 1/16 inch smaller. the wider side of the taper is
nominally 3" on two of them (although one is 1/16" over and one 1/16"
under), with 2-3/4" nominal (same variances) for the narrower side
of the taper. the third brick is nominally 2-1/2 x 2-1/8, but is is
also 1/16" undersized.
2-1/2 x 1-3/4 taper is a #2 arch according to harbison-walker, who
all our different varieties of bricks are from.
The #1 arch has ~ 2 degrees of taper either side.
the varying thicknesses are nice, since you can make a stronger arch
by eliminating the need for straight bricks in the arch.
The main thing is to be very specific with your supplier, so that you
know exactly what you need and exactly what you are getting. buying
a bunch of the wrong size is an expensive mistake. on the bright
side, you can always use any bricks that don't work out for your kiln
to make a wood fired pizza oven.
-jon
jon byler
3-D Building Coordinator
Art Department
Auburn University, AL 36849
On Oct 25, 2008, at 1:04 PM, Michael Wendt wrote:
> Bruce,
> I just checked the Yukon W1 I have.
> It is like your second example, symmetric
> about the center line.
> Dimensions:
> 9" L X 4 1/2" W X 2 1/2" Thick on the wide end
> by 1 3/4" on the narrow end.
> Regards,
> Michael Wendt
> Wendt Pottery
> 2729 Clearwater Ave.
> Lewiston, Id 83501
> U.S.A.
> 208-746-3724
> wendtpot@lewiston.com
> http://www.wendtpottery.com
> http://UniquePorcelainDesigns.com
> Bruce wrote:
> Fred Olsen shows the dimensions of a No. 1 arch brick
> as 4 1/2 x 2 1/2 x 2 1/8
> But he shows that the width reduction is all taken from
> one side of the brick, that is, two of the angles
> remain right angles. I would have expected that the
> width would be reduced symmetrically, yet I can
> understand that it may be easier to manufacture the
> asymmetric brick that Olsen shows.
>
> So, does a No 1 arch brick go like this
>
> _______________
> | /
> | /
> | /
> | /
> | /
> | /
> | /
> -----------
>
> or like this?
>
>
> _______________
> \ /
> \ /
> \ /
> \ /
> \ /
> \ /
> \ /
> ----------
>
> Thanks,
>
> Bruce Girrell
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