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Question about concrete movement tolerence

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Question about concrete movement tolerence regan32 10-17-2006
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Posted by regan32 on October 17, 2006, 2:54 am
Hi all,

I have a problem in the house I am living at and could use some advice
from the knowledegable. The house is a concrete slab construction with
concrete support post and steel beams. The problems started with the
floor of the upstairs master bedroom, the tiles "exploded" out of the
floor in a line about 4m long by 2m wide. When all was said and done
the tiles were "tented" up against each other and off the floor by a
good 30cm. Also noticed are some large cracks in the concrete walls and
outside path downstairs of the room with the possesed floor. Now my
question is what would you consider acceptable movement of a concrete
floor before being freaked out about structural weakness? and what are
the danger signs to be looking for taking in to acount that im a total
layman?
Another point of note is this house is over 8 years old (not sure if
that is valid or not) and the local building standards in this country
(Brunei) are haphazard and dangerous at best.

Any advice on what to look at, what to read, properties of concrete or
so on would be greatly appreciated as im kinda freaked out by the
creaking noises.

Thanks
Shannon


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Posted by dpb on October 17, 2006, 12:43 pm

regan32 wrote:
> Hi all,
>
> I have a problem in the house I am living at and could use some advice
> from the knowledegable. The house is a concrete slab construction with
> concrete support post and steel beams. The problems started with the
> floor of the upstairs master bedroom, the tiles "exploded" out of the
> floor in a line about 4m long by 2m wide. When all was said and done
> the tiles were "tented" up against each other and off the floor by a
> good 30cm. Also noticed are some large cracks in the concrete walls and
> outside path downstairs of the room with the possesed floor. Now my
> question is what would you consider acceptable movement of a concrete
> floor before being freaked out about structural weakness? and what are
> the danger signs to be looking for taking in to acount that im a total
> layman?
> Another point of note is this house is over 8 years old (not sure if
> that is valid or not) and the local building standards in this country
> (Brunei) are haphazard and dangerous at best.
>
> Any advice on what to look at, what to read, properties of concrete or
> so on would be greatly appreciated as im kinda freaked out by the
> creaking noises.

30cm???!!! If that's not a typo, this ain't concrete "movement", it's
an actual structural shift and I'd say you need to find another place
to live _now_ until someone really knowledgeable can do an inspection.
Sounds like the whole thing could potentially collapse at any time--I'd
not trust it as such construction is prone to catastrophic failure
rather than gradual.


Posted by regan32 on October 17, 2006, 7:27 pm
Doh that was a typo, 30mm is what I meant. Even so it was alarming to
see.



dpb wrote:
> regan32 wrote:
> > Hi all,
> >
> > I have a problem in the house I am living at and could use some advice
> > from the knowledegable. The house is a concrete slab construction with
> > concrete support post and steel beams. The problems started with the
> > floor of the upstairs master bedroom, the tiles "exploded" out of the
> > floor in a line about 4m long by 2m wide. When all was said and done
> > the tiles were "tented" up against each other and off the floor by a
> > good 30cm. Also noticed are some large cracks in the concrete walls and
> > outside path downstairs of the room with the possesed floor. Now my
> > question is what would you consider acceptable movement of a concrete
> > floor before being freaked out about structural weakness? and what are
> > the danger signs to be looking for taking in to acount that im a total
> > layman?
> > Another point of note is this house is over 8 years old (not sure if
> > that is valid or not) and the local building standards in this country
> > (Brunei) are haphazard and dangerous at best.
> >
> > Any advice on what to look at, what to read, properties of concrete or
> > so on would be greatly appreciated as im kinda freaked out by the
> > creaking noises.
>
> 30cm???!!! If that's not a typo, this ain't concrete "movement", it's
> an actual structural shift and I'd say you need to find another place
> to live _now_ until someone really knowledgeable can do an inspection.
> Sounds like the whole thing could potentially collapse at any time--I'd
> not trust it as such construction is prone to catastrophic failure
> rather than gradual.


Posted by AndyS on October 18, 2006, 1:33 pm

regan32 wrote:
> Doh that was a typo, 30mm is what I meant. Even so it was alarming to
> see.
>
>
Andy writes:

Still, 1 and 1/4 inches ( good Christian measurements :>))) )
is a hel of a lot...

Something is wicked wrong !!!!

Did you experience an earthquake "?

Did the house float off in a flood ?

Well, if the above didn't happen, somebody screwed up...

I suggest you check for a cracked 1st floor slab...

If this happened on the second story, something bad
happened on the first...

Carpeting covers up a LOT of really bad cracks.... and
you probly can't see them till you pullup the carpet..

Don't fall in..!!!!

Andy in Eureka, Texas


Posted by CWatters on October 21, 2006, 4:59 am

>
> regan32 wrote:
> > Doh that was a typo, 30mm is what I meant. Even so it was alarming to
> > see.
> >
> >
> Andy writes:
>
> Still, 1 and 1/4 inches ( good Christian measurements :>))) )
> is a hel of a lot...

Perhaps not. If tiles are laid tight (too tight) against each other they can
pop up quite alarmingly _without_ the floor/wall moving very much. It's all
to do with the angles. Sometimes it's just caused by water getting behind
the tiles.

Best call in a professional. In the UK we would contact a Structural
Engineer to look at the cracks. Not sure who you call in Brunei







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