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Posted by don on January 15, 2010, 6:07 pm
While is it tragic what happened in Haiti I am wondering if a building could
even be effectively designed to withstand the
magnitude of the Haiti earthquake......... in-otherwords would say the Calf.
Building code have prevented many of the deaths
and destruction in Haiti or was this earthquake just too strong. I use Calf.
building code only because I know that state has many
earthquakes and does try and prepare their buildings for one.
I'm asking this question because if the United States is going to be the
ones to primarily rebuild the schools, hospitals, roads, etc.
in Haiti then perhaps We should just make the country part of us so at
least we know things will get built right and perhaps prevent
these things from happening again as such a large catastrophic disaster.
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Posted by Martin Clark on January 16, 2010, 4:38 am
show/hide quoted text
> While is it tragic what happened in Haiti I am wondering if a building
> could even be effectively designed to withstand the
> magnitude of the Haiti earthquake......... in-otherwords would say the
> Calf. Building code have prevented many of the deaths
> and destruction in Haiti or was this earthquake just too strong. I use
> Calf. building code only because I know that state has many
> earthquakes and does try and prepare their buildings for one.
>
> I'm asking this question because if the United States is going to be
> the ones to primarily rebuild the schools, hospitals, roads, etc.
> in Haiti then perhaps We should just make the country part of us so
> at least we know things will get built right and perhaps prevent
> these things from happening again as such a large catastrophic
> disaster.
>
Difficult to assess the situation at this stage. Seems to me an inordinate
amount of damage to buildings that look to have been reasonably
constructed, eg massive concrete frame connections torn completely apart.
However, not much evidence of tortion joints anywhere? The seismic scale
doesn't really tell us much. Where was the epicenter? Right underneath Port
au Prince? A lot depends on the geology. My experience is limited to PNG;
The Siassi Earthquake, 7.8, caused a few landslides, sprung some pipes and
swimming pools ... not much else. 7.8 in Mexico City would be major,
because (I'm told) the city is basically sitting in a bowl of rock, so the
reciprocating wave is greatly magnified.
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Posted by Martin Clark on January 19, 2010, 6:42 am
show/hide quoted text
>> > > While is it tragic what happened in Haiti I am wondering if a
>> > > building could even be effectively designed to withstand the
>> > > magnitude of the Haiti earthquake......... in-otherwords would
>> > > say the Calf. Building code have prevented many of the deaths
>> > > and destruction in Haiti or was this earthquake just too strong.
>> > > I use Calf. building code only because I know that state has many
>> > > earthquakes and does try and prepare their buildings for one.
>> > > I'm asking this question because if the United States is going to
>> > > be the ones to primarily rebuild the schools, hospitals, roads,
>> > > etc. in Haiti then perhaps We should just make the country part
>> > > of us so at least we know things will get built right and
>> > > perhaps prevent these things from happening again as such a large
>> > > catastrophic disaster.
>> > Difficult to assess the situation at this stage. Seems to me an
>> > inordinate amount of damage to buildings that look to have been
>> > reasonably constructed, eg massive concrete frame connections torn
>> > completely apart. However, not much evidence of tortion joints
>> > anywhere? The seismic scale doesn't really tell us much. Where was
>> > the epicenter? Right underneath Port au Prince? A lot depends on
>> > the geology. My experience is limited to PNG; The Siassi
>> > Earthquake, 7.8, caused a few landslides, sprung some pipes and
>> > swimming pools ... not much else. 7.8 in Mexico City would be
>> > major, because (I'm told) the city is basically sitting in a bowl
>> > of rock, so the reciprocating wave is greatly magnified.
>> A famous and highly experienced architectural designer, Don
>> Linsenbach,
>> and us (me & wife) have been engaged in planning economical prefab
>> buildings for a number of years to meet the challenges of a
>> population that the Haitians have where hurricanes and earthquakes
>> occur.
>> Our findings are a small well designed building can be mass produced,
>> in factories and shipped in for rapid assembly, such as this
>> prototype,
>> http://www.flickr.com/photos/dynamics/
>> that has been tested by us personally, and found comfortable.
>> Constructed with screwed and glued panels with attention payed
>> to all joints, a small building (20x20), is actually a girdered unit.
>> The unit is easily adequate for a family of 6, and has shuttered
>> dual pane windows.
Interesting stuff Ken, not so far from something I have been working on.
[Got put on the back-burner, but there is a looming housing affordability
crisis here, it is now unlawful for land developers to mandate minimum size
for dwellings, so maybe it will come to the front again ...]
20 x 20 ... I was working on a 6m (19.7ft) x 3.5m (11.5ft) module. 6m
easily fits on a flatbed truck, 3.5m because that's a "wide" load but not
"exceptional" load under local road rules. 1 module has enough space to
comply as a dwelling, Can be lifted with simple cranage. 2 makes a family
unit.
show/hide quoted text
>> [...]
>> The units are versatile and the flat roof has a 24x24 area,
Not sure of flat roofs for the tropics - uncommon here ...
Framed structures work well. Heat is gained, sure, but easily lost after
sunset, whereas masonry is a heat store and hugely inefficient unless fully
protected from the sun.
My stuff on design in the tropics, affordable housing, etc:
http://people.aapt.net.au/jclark19/
A personal take, but some of my stuff has been referenced by Prof Dick
Aynsley, UNESCO Professor of Architecture.
show/hide quoted text
> Where cost is concerned, I think we can install the units at $10k
> to $20k a piece, amounting to 1-2 $billion of infrastructural input,
> for a subdivision of 100,000 homes. Note the units come with a
> 1000+ gallon cistern supplied by the run-off from the roof, that is
> also an emergency source of water.
This was also the target price for the stuff I was working on - in Oz
dollars but there's more or less parity these days :-)
1000 gallons = +/- 3636 litres. Yep. It looks like Haiti has more periods
of tropical maritime than a typical wet tropics climate - dry periods
rather than rain almost every evening. Average rainfall only slightly
higher than NQ 'dry' tropics, but at least it doesn't all come down at
once? Tanks might work ok, but will need to be mozzy-proof. That part of
the Caribbean has Dengue as well.
Framed construction can work well where there are both earth tremours and
cyclones/hurricanes. Where wind is concerned, design is dependent on a
continuous load path throughout the structure, from roof surface to
foundation. The problem is not primarily the materials (provided they are
adequate), but how they are fixed together. I'm not so familiar with earth
movement, but, as I said before, joints need to have some sort of torsion
function. I've seen massive timber beam/column joints holding up in an
earthquake, because the joints were vine lashings - the joints tighten as
they move. Plate and bolt joints just tear apart.
Not sure about double glazing. Here, 6mm laminated glass, usually min. 21%
solar-reduced, plus extra-toughened for smaller spaces such as bathrooms.
Or maybe leave out the glass. Shutters would help protect from flying
debris, as long as they aren't the first thing to come off when the wind
gets up.
show/hide quoted text
> It appears to me, we'll need to re-build Haiti, to survive hurricanes
> and earthquakes, and get it productive, also respect the people
> there need simplistic systems, Conception Dynamics stands
> ready to provide the details on how to do that.
>
> Designing for a tropical enviroment is somewhat beyond our ken,
> so architectual experts versed in that region will be needed,
> where humidity and fungus is concerned.
In PNG we had small electric heaters to keep the air drier in enclosed
spaces like wardrobes. Not very effective. Maximising air movement is best.
Also discourages mosquitoes - they like still air. Good supply of plastic
tubs with lids and silica gel helps protect small items. Btw - dunno
whether they've improved over the years, but in my time, printed circuit
boards literally took on a life of their own in the humid tropics.
show/hide quoted text
>
> For Conception Dynamics
> Ken S. Tucker
>
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Posted by creative1985@gmail.com on January 20, 2010, 5:11 pm
The initial building envelope is 16'x16', with loft area for sleeping
and storage, and a front porch.
This is a totally stand alone application, off grid, if you will.
Most of the big stuff has been worked out and the finer aspects are
currently being worked on.
This package will be modular, in that it will be fabricated in a
facility, loaded onto ONE truck and then assembled on site.
The difficult part is making it modular and able to fit on one truck.
Aside from foundation requirements, this package can be made move-in
ready by 2 capable adults in less than 1 week after site delivery.
Total package cost? $15,000.00 US + delivery
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Posted by Martin Clark on January 23, 2010, 5:15 pm
b479-68f076ff7fbb@14g2000yqp.googlegroups.com:
show/hide quoted text
> wrote:
>> The initial building envelope is 16'x16', with loft area for sleeping
>> and storage, and a front porch.
>> [...]
>> The difficult part is making it modular and able to fit on one truck.
>> Aside from foundation requirements, this package can be made move-in
>> ready by 2 capable adults in less than 1 week after site delivery.
>> Total package cost? $15,000.00 US + delivery
>
> I think we should argue this Don.
> Having lived in 8x12 (factory office), 16x16 (cottage), and now a
> 20x20,
> we have decided that 20x20 is minimalistic and comfortable, based on
> experience.
> We have really no sense of compromise.
> We have enough room to dance, and wifey does her nude yoga either
> in the front room or in the bedroom. Also we have quite a bit of room
> for crafts and working.
>
> I'll post updated photos if you guys want.
>
> In our 20x20 the parents can sleep in the front room and brats can
> bunk in the bedroom .
> The bath tub is located centrally.
> Rain water can be directed into the cistern by a slight tilt and a
> flat roof
> and is very easy to construct and maintain.
>
> We can set up factories in Haiti, to prefab the components from the
> raw
> lumber Canada can supply, thereby producing employment and training
> the Haitians about housing development, and from there, they can go on
> to McMansions, you know.
>
> I think this 20x20 will meet a tough brundled Florida Hurricane Code
> and
> a Calf. Earthquake Code, in the same design, and provide decent and
> affordable housing.
> What do you think?
>
> There is a bit of short fuse on this.
> Ken
I reckon 20 x 20 (6 x 6) also. Done as 2 x 6 x 3 modules? Bolt together
or freestanding - gap between has shade sail? In the interim period a 20
x 20 will end up with at least two families in it. Cooking outside.
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> could even be effectively designed to withstand the
> magnitude of the Haiti earthquake......... in-otherwords would say the
> Calf. Building code have prevented many of the deaths
> and destruction in Haiti or was this earthquake just too strong. I use
> Calf. building code only because I know that state has many
> earthquakes and does try and prepare their buildings for one.
>
> I'm asking this question because if the United States is going to be
> the ones to primarily rebuild the schools, hospitals, roads, etc.
> in Haiti then perhaps We should just make the country part of us so
> at least we know things will get built right and perhaps prevent
> these things from happening again as such a large catastrophic
> disaster.
>