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Framing with ashlar masonry

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Framing with ashlar masonry Tim 02-29-2008
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Posted by Tim on February 29, 2008, 11:59 pm
To any architects out there....

I am curious about the type of framing used for multi-storey homes
with ashlar stone masonry on the facades. I once read that large homes
with ashlar stone walls had to be balloon-framed. I think that it had
to do with the expansion and contraction of the frame. Is that true?
Or may such structures be constructed using platform framing?

Tim

Posted by Michael Bulatovich on March 1, 2008, 10:17 am

> To any architects out there....
>
> I am curious about the type of framing used for multi-storey homes
> with ashlar stone masonry on the facades. I once read that large homes
> with ashlar stone walls had to be balloon-framed. I think that it had
> to do with the expansion and contraction of the frame. Is that true?
> Or may such structures be constructed using platform framing?

You're talking about veneer, right? Why would ashlar stone be any different
than any other stone, or brick for that matter?



Posted by EDS on March 1, 2008, 12:13 pm


>
>> To any architects out there....
>>
>> I am curious about the type of framing used for multi-storey homes
>> with ashlar stone masonry on the facades. I once read that large homes
>> with ashlar stone walls had to be balloon-framed. I think that it had
>> to do with the expansion and contraction of the frame. Is that true?
>> Or may such structures be constructed using platform framing?
>
> You're talking about veneer, right? Why would ashlar stone be any
> different than any other stone, or brick for that matter?
>
Maybe he is thinking about the need to pick up the masonry veneer load every
2 floors, although the type of framing would not make any difference that I
can see. I wouldn't do it with a wood frame anyway.
EDS



Posted by Michael Bulatovich on March 1, 2008, 4:30 pm

>
>
>>
>>> To any architects out there....
>>>
>>> I am curious about the type of framing used for multi-storey homes
>>> with ashlar stone masonry on the facades. I once read that large homes
>>> with ashlar stone walls had to be balloon-framed. I think that it had
>>> to do with the expansion and contraction of the frame. Is that true?
>>> Or may such structures be constructed using platform framing?
>>
>> You're talking about veneer, right? Why would ashlar stone be any
>> different than any other stone, or brick for that matter?
>>
> Maybe he is thinking about the need to pick up the masonry veneer load
> every 2 floors, although the type of framing would not make any difference
> that I can see. I wouldn't do it with a wood frame anyway.
> EDS

The only other concern I can imagine is differential expansion vs. framing
shrinkage. Balloon shrinks less than western, but I'm not sure of the
difference in the coefficients of expansion for brick vs. stone....I would
think that brick was lower because of the internal voids but I don't think
the difference is large. Western framing shrinkage can easily reach 3/4" or
more once you get to three floors, depending on the usual variables.
--


MichaelB
www.michaelbulatovich.ca



Posted by EDS on March 3, 2008, 11:00 am



>
>>
>>
>>>
>>>> To any architects out there....
>>>>
>>>> I am curious about the type of framing used for multi-storey homes
>>>> with ashlar stone masonry on the facades. I once read that large homes
>>>> with ashlar stone walls had to be balloon-framed. I think that it had
>>>> to do with the expansion and contraction of the frame. Is that true?
>>>> Or may such structures be constructed using platform framing?
>>>
>>> You're talking about veneer, right? Why would ashlar stone be any
>>> different than any other stone, or brick for that matter?
>>>
>> Maybe he is thinking about the need to pick up the masonry veneer load
>> every 2 floors, although the type of framing would not make any
>> difference that I can see. I wouldn't do it with a wood frame anyway.
>> EDS
>
> The only other concern I can imagine is differential expansion vs. framing
> shrinkage. Balloon shrinks less than western, but I'm not sure of the
> difference in the coefficients of expansion for brick vs. stone....I would
> think that brick was lower because of the internal voids but I don't think
> the difference is large. Western framing shrinkage can easily reach 3/4"
> or more once you get to three floors, depending on the usual variables.
> --
>
>
> MichaelB
> www.michaelbulatovich.ca
>
Yes, with vertical strip windows between.
Shaped like this in section, with post tensioning.
Stepped to exterior. Bricks were 4x4x12 with semi-gloss glazed exterior.
_______
___l l___
__ l l___
l o o o l
l__________________ l

EDS



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