went to one of the local indian casinos for the buffer (great price and good
food) and notice that the floor seemed to be springy. It's an all concrete
building and I was trying to explain to my friend that it shouldn't be that way
but she insisted that it was to help resist earthquake damage.

went back and forth so she made me ask around. how do I explain that her logic
is wrong...or is it?

"Malcom "Mal" Reynolds" wrote in message
went to one of the local indian casinos for the buffer (great price
and good
food) and notice that the floor seemed to be springy. It's an all
concrete
building and I was trying to explain to my friend that it shouldn't
be that way
but she insisted that it was to help resist earthquake damage.

went back and forth so she made me ask around. how do I explain that
her logic
is wrong...or is it?

Some buildings are on springs.

Also some carpet has a springiness to it so it makes it easier to
stand on longer. Perhaps some non-carpet floors are like that too?

The difference would be if you just stood there and noticed movement,
then earthquake springs...
http://en.wikipedia.org/wiki/Earthqu..._base_isolator

On Jan 12, 11:54*pm, "Malcom \"Mal\" Reynolds" atlas-
wrote:
went to one of the local indian casinos for the buffer (great price and good
food) and notice that the floor seemed to be springy. It's an all concrete
building and I was trying to explain to my friend that it shouldn't be that way
but she insisted that it was to help resist earthquake damage.

went back and forth so she made me ask around. how do I explain that her logic
is wrong...or is it?

You have no idea if the floor itself (supporting structure and poured
slab) was "springy" or if it was part of the floor surfacing treatment
which created a cushioning effect which you experienced...

In certain types of flooring a cushioning effect is created by the
materials which are just under the surface layer to prevent injury or
fatigue in the people using the area... Ex: basketball court flooring
has shock absorbing layers underneath the shiny wooden top layer,
dance flooring has similar properties...

Which area of the casino were you in ? In most casinos the "floor"
is not actually the slab, the entire gaming floor area is set up on
top
of a raised flooring system of the kind you would see used in a
computer data center of the type you would find a super computer
located in so that any configuration desired for power wiring and
communications cabling can be quickly set up simply by pulling
whatever wiring is needed below the flooring system to whichever
spot it is desired or needed in anywhere in the gaming area...

You are correct in that your friend hasn't a clue about what is a
"safe"
design for earthquakes... Wherein you would want shock absorbers
in the main structural elements and a tuned mass damper in a tall
building, and in a smaller building like a home, it is all about
maintaining
structural integrity between all the major component parts of the
house
so that the lateral forces don't rip it apart or separate it from its
foundation...
Landslide protection in the way of extreme anchoring the house to the
ground with oversized foundation elements is also often a precaution
required in areas with earthquake protection requirements in the
building
code...

~~ Evan

On Jan 12, 8:54*pm, "Malcom \"Mal\" Reynolds" atlas-
wrote:
went to one of the local indian casinos for the buffer (great price and good
food) and notice that the floor seemed to be springy. It's an all concrete
building and I was trying to explain to my friend that it shouldn't be that way
but she insisted that it was to help resist earthquake damage.

went back and forth so she made me ask around. how do I explain that her logic
is wrong...or is it?

She is wrong.

Floor springiness has little or nothing to do with earthquake
resistant design.
What was the basis of her premise? That the floor "gives" during an
earthquake?

Earthquakes damage buildings due to "lateral" forces (sideways) not
vertical forces.

Your comment of " it shouldn't be that way" is also incorrect

Human occupants dislike springy floors however building owners are
willing to put up with them because they are the unfortunate outcome
of the desire for the floors below having fewer columns and thus more
open space.

Floor springiness is often a problem is modern timber framed
construction.... again, the desire for an open floor plan with fewer
interior walls makes for longer floor joist spans.

There is way more completely explaining why your friend is wrong.

try this google search string

do "springy floors" resist earthquakes better?

cheers
Bob

On 1/12/2012 11:54 PM, Malcom "Mal" Reynolds wrote:
went to one of the local indian casinos for the buffer (great price and good
food) and notice that the floor seemed to be springy. It's an all concrete
building and I was trying to explain to my friend that it shouldn't be that way
but she insisted that it was to help resist earthquake damage.

went back and forth so she made me ask around. how do I explain that her logic
is wrong...or is it?

Try walking on it when you're sober and see if it still feels springy.

On Jan 13, 6:43*am, "Bill" wrote:
"Malcom "Mal" Reynolds" *wrote in message

went to one of the local indian casinos for the buffer (great price
and good
food) and notice that the floor seemed to be springy. It's an all
concrete
building and I was trying to explain to my friend that it shouldn't
be that way
but she insisted that it was to help resist earthquake damage.

went back and forth so she made me ask around. how do I explain that
her logic
is wrong...or is it?

Some buildings are on springs.

Also some carpet has a springiness to it so it makes it easier to
stand on longer. Perhaps some non-carpet floors are like that too?

The difference would be if you just stood there and noticed movement,
then earthquake springs...http://en.wikipedia.org/wiki/Earthqu...ings-with-damp...

Dance floors are traditionally sprung.
http://en.wikipedia.org/wiki/Sprung_floor

In article ,
"Bill" wrote:

"Malcom "Mal" Reynolds" wrote in message
went to one of the local indian casinos for the buffer (great price and
good food) and notice that the floor seemed to be springy. It's an all
concrete building and I was trying to explain to my friend that it
shouldn't be that way but she insisted that it was to help resist
earthquake damage.

went back and forth so she made me ask around. how do I explain that her
logic is wrong...or is it?

Some buildings are on springs.

Also some carpet has a springiness to it so it makes it easier to stand on
longer. Perhaps some non-carpet floors are like that too?

The difference would be if you just stood there and noticed movement, then
earthquake springs...
http://en.wikipedia.org/wiki/Earthqu...-damper_base_i
solator

I've been on plush carpet but never so plush that it sprung bac

In article ,
Evan wrote:

On Jan 12, 11:54*pm, "Malcom \"Mal\" Reynolds" atlas-
wrote:
went to one of the local indian casinos for the buffer (great price and
good food) and notice that the floor seemed to be springy. It's an all
concrete building and I was trying to explain to my friend that it
shouldn't be that way but she insisted that it was to help resist
earthquake damage.

went back and forth so she made me ask around. how do I explain that her
logic is wrong...or is it?

You have no idea if the floor itself (supporting structure and poured slab)
was "springy" or if it was part of the floor surfacing treatment which
created a cushioning effect which you experienced...

true, I have no idea, but I was sitting down at a table and the floor seemed to
spring when people walked near my table. I, rightly or wrongly, eliminated the
idea of a super springy carpet pad



In certain types of flooring a cushioning effect is created by the materials
which are just under the surface layer to prevent injury or fatigue in the
people using the area... Ex: basketball court flooring has shock absorbing
layers underneath the shiny wooden top layer, dance flooring has similar
properties...

Which area of the casino were you in ? In most casinos the "floor" is not
actually the slab, the entire gaming floor area is set up on top of a raised
flooring system of the kind you would see used in a computer data center of
the type you would find a super computer located in so that any configuration
desired for power wiring and communications cabling can be quickly set up
simply by pulling whatever wiring is needed below the flooring system to
whichever spot it is desired or needed in anywhere in the gaming area...

this was the "food court" area which was one floor below the actual casino.

On Thu, 12 Jan 2012 20:54:42 -0800, "Malcom \"Mal\" Reynolds"
wrote:

went to one of the local indian casinos for the buffer (great price and good
food) and notice that the floor seemed to be springy. It's an all concrete
building and I was trying to explain to my friend that it shouldn't be that way
but she insisted that it was to help resist earthquake damage.

There was an earthquake at a casino along a big fault line in South
America. Roulette wheels, poker chips, and french fries** were
everywhere. Oh, the humaniity.

So help me, I'll never be a part of a gambling tragedy again.

went back and forth so she made me ask around. how do I explain that her logic
is wrong...or is it?

Maybe they make the floor more comfortable so people won't get tired
and leave?

**They are callled pappas fritas in South America, but it was no less
tragic.

"Malcom "Mal" Reynolds" wrote in message
...

. . . I was sitting down at a table and the floor seemed to
spring when people walked near my table. . . .
this was the "food court" area which was one floor below the actual
casino.

A springy floor in a dining area suggests the contractor saved
money by installing the minimum number of floor joists required
by the building code.

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)

On 1/14/2012 9:33 AM, Don Phillipson wrote:
....

A springy floor in a dining area suggests the contractor saved
money by installing the minimum number of floor joists required
by the building code.

I expect the contractor installed precisely the number, type and spacing
of joists specified by the architect/engineer...

--

On Jan 14, 3:41*pm, dpb wrote:
On 1/14/2012 9:33 AM, Don Phillipson wrote:
...

A springy floor in a dining area suggests the contractor saved
money by installing the minimum number of floor joists required
by the building code.

I expect the contractor installed precisely the number, type and spacing
of joists specified by the architect/engineer...

--

I expect it is/was a dance floor and is performing exactly to
specification.

In article ,
harry wrote:

On Jan 14, 3:41*pm, dpb wrote:
On 1/14/2012 9:33 AM, Don Phillipson wrote:
...

A springy floor in a dining area suggests the contractor saved
money by installing the minimum number of floor joists required
by the building code.

I expect the contractor installed precisely the number, type and spacing
of joists specified by the architect/engineer...

--

I expect it is/was a dance floor and is performing exactly to
specification.

it is not a dance floor. it is a restaurant and sometimes bingo parlor

On Jan 14, 2:29*pm, "Malcom \"Mal\" Reynolds" atlas-
wrote:
In article ,



*harry wrote:
On Jan 14, 3:41*pm, dpb wrote:
On 1/14/2012 9:33 AM, Don Phillipson wrote:
...

A springy floor in a dining area suggests the contractor saved
money by installing the minimum number of floor joists required
by the building code.

I expect the contractor installed precisely the number, type and spacing
of joists specified by the architect/engineer...

--

I expect it is/was a dance floor and is performing exactly to
specification.

it is not a dance floor. it is a restaurant and sometimes bingo parlor

It sounds as if that area of the building was built to the same
designs
as the casino floor area -- i.e. it is built on that raised floor
system
that I described in my previous postings...

Especially given your better description of the "feeling"...

~~ Evan