weight machine inside house

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I am considering a weight training machine to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

I doin't know what you are calling a machine, but almost all "machines" are
garbage and far inferior (and much more expensive) than some basic weight
training equipment.

Almost any floor can handle this weight. This is like three of four people
standing in close proximity.

And if you need to do chins close to a ceiling, just lower the bar. This is
easily done with straps (webbing) or some cable handles hooked to some chan
or webbing thrown over the bar. Just bend the knees and chin to the new
lower high point hanging from the regular height chin bars.

Quoted message said:

I am considering a weight training machine

Which "machine"?

Quoted message said:

to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

When you develop the strength to pull the bar to your chest, the tops of
your shoulders will be above the bar. Any momentum also involved
increases the experience of pain as your head impacts the ceiling.

Quoted message said:

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

Sorry, I haven't a clue on this one.

Cheers,

Ari

--
spammage trappage: remove the underscores to reply

I'm going to die rather sooner than I'd like. I tried to protect my
neighbours from crime, and became the victim of it. Complications in
hospital following this resulted in a serious illness. I now need a bone
marrow transplant. Many people around the world are waiting for a marrow
transplant, too. Please volunteer to be a marrow donor:
http://www.abmdr.org.au/
http://www.marrow.org/

"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

I am considering a weight training machine

Which "machine"?

Quoted message said:

to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

When you develop the strength to pull the bar to your chest, the tops of
your shoulders will be above the bar. Any momentum also involved increases
the experience of pain as your head impacts the ceiling.

Quoted message said:

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

Sorry, I haven't a clue on this one.

Ari, I believe this person is a f------d. How does he expect anyone to be
able to figure out what his structural load is

David said:

"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

I am considering a weight training machine

Which "machine"?

Quoted message said:

to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

When you develop the strength to pull the bar to your chest, the tops of
your shoulders will be above the bar. Any momentum also involved increases
the experience of pain as your head impacts the ceiling.

Quoted message said:

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

Sorry, I haven't a clue on this one.

Ari, I believe this person is a f------d. How does he expect anyone to be
able to figure out what his structural load is

Someone with experience here might be able to tell him in general terms,
but nobody here even knows exactly what he's planning on putting in that
room, much less the structure and condition of his specific house.

Ari

--
spammage trappage: remove the underscores to reply

I'm going to die rather sooner than I'd like. I tried to protect my
neighbours from crime, and became the victim of it. Complications in
hospital following this resulted in a serious illness. I now need a bone
marrow transplant. Many people around the world are waiting for a marrow
transplant, too. Please volunteer to be a marrow donor:
http://www.abmdr.org.au/
http://www.marrow.org/

"David" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

I am considering a weight training machine

Which "machine"?

Quoted message said:

to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

When you develop the strength to pull the bar to your chest, the tops of
your shoulders will be above the bar. Any momentum also involved

increases

Quoted message said:

Quoted message said:

the experience of pain as your head impacts the ceiling.

Quoted message said:

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

Sorry, I haven't a clue on this one.

Ari, I believe this person is a f------d. How does he expect anyone to be
able to figure out what his structural load is

55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10 psf
Top-dead(2), and 5 psf Bottom-dead(2). All building codes require that the
stiffness factor be at least L/360 (though it's common to use L/480 to
minimize deflection or "bouncy" floor). The OP need not worry about weight
causing structural failure. The only real concern would be cosmetic (i.e.
cracks in a finished ceiling below, cracks in grout lines of a tile floor,
dents/scruffs in a wood floor, etc.) As a general rule of thumb, you almost
never need to worry about a load until it's 750+lbs. in a 1 s.f. area (think
a FAT guy standing on one leg). Anything less than that will be fine. Now
if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest he
consult a local Structural Engineer to further address his rooms structural
capabilities.

(1) Live Loads are those loads that can come and go over the life of the
structure. This would typically include people and furniture, but may
include such things as wind, snow, and ice in roof applications. Most
building codes require a floor system to be able to withstand 40 psf load.
Typically, a floor system will never see full live load unless it's flooded
8-inches deep in water!
(2) Dead Loads are the weights of the building materials used in the
structure itself. This might include such things as the joists, subfloor,
carpet/padding, flooring tile, acoustic tile and sheetrock.

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"David" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
news:[email hidden]...

Quoted message said:

[email hidden] wrote:
> I am considering a weight training machine

Which "machine"?

> to work out at home, it has
> a pull up bar located at 82", I would like to place it inside the
> house (ceiling : 8 ft / 96"😉 , instead of the garage for various
> reasons. I was wondering if a ceiling height of 8' would hinder the
> pull up exercise. I figure my shoulders do not reach up past the
> handle bar, and from the shoulder to top of my head should leave me
> about 2-3" from the ceiling.
>

When you develop the strength to pull the bar to your chest, the tops
of
your shoulders will be above the bar. Any momentum also involved

increases

Quoted message said:

Quoted message said:

the experience of pain as your head impacts the ceiling.

> Next question is the foundation of the home, it is crawl space
> foundation type, the various weight machines I am looking at varies
> from 250-350 lbs, would I need to add any reinfocements in the crawl
> space or generally this kind of weight, plus mine (160 lbs), so figure
> about 500 lbs loaded on around a 3'' x 5' area.

Sorry, I haven't a clue on this one.

Ari, I believe this person is a f------d. How does he expect anyone to be
able to figure out what his structural load is

55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10 psf
Top-dead(2), and 5 psf Bottom-dead(2). All building codes require that
the
stiffness factor be at least L/360 (though it's common to use L/480 to
minimize deflection or "bouncy" floor). The OP need not worry about
weight
causing structural failure. The only real concern would be cosmetic (i.e.
cracks in a finished ceiling below, cracks in grout lines of a tile floor,
dents/scruffs in a wood floor, etc.) As a general rule of thumb, you
almost
never need to worry about a load until it's 750+lbs. in a 1 s.f. area
(think
a FAT guy standing on one leg). Anything less than that will be fine.
Now
if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest he
consult a local Structural Engineer to further address his rooms
structural
capabilities.

(1) Live Loads are those loads that can come and go over the life of the
structure. This would typically include people and furniture, but may
include such things as wind, snow, and ice in roof applications. Most
building codes require a floor system to be able to withstand 40 psf load.
Typically, a floor system will never see full live load unless it's
flooded
8-inches deep in water!
(2) Dead Loads are the weights of the building materials used in the
structure itself. This might include such things as the joists, subfloor,
carpet/padding, flooring tile, acoustic tile and sheetrock.

Holy [censored], Ari you sure know a thing or two about a thing or two.
What about factoring in the condition of the matierials? i.e. suppose we are
dealing with rot or termites etc affecting structural timbers?

Quoted message said:

In article <[email hidden]>,

Lee Michaels said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I am considering a weight training machine to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

I doin't know what you are calling a machine, but almost all "machines" are
garbage and far inferior (and much more expensive) than some basic weight
training equipment.

Almost any floor can handle this weight. This is like three of four people
standing in close proximity.

Or yo' momma!

;^?

--
Keith

In article <[email hidden]>,

Lee Michaels said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I am considering a weight training machine to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

I doin't know what you are calling a machine, but almost all "machines" are
garbage and far inferior (and much more expensive) than some basic weight
training equipment.

Almost any floor can handle this weight. This is like three of four people
standing in close proximity.

Or yo' momma!

;^?

--
Keith

"Hobbes" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

In article <[email hidden]>,

Lee Michaels said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I am considering a weight training machine to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

I doin't know what you are calling a machine, but almost all "machines"
are
garbage and far inferior (and much more expensive) than some basic weight
training equipment.

Almost any floor can handle this weight. This is like three of four
people
standing in close proximity.

Or yo' momma!

;^?

LMAO!!!

"David" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"David" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
news:[email hidden]...
> [email hidden] wrote:
>> I am considering a weight training machine
>
> Which "machine"?
>
>> to work out at home, it has
>> a pull up bar located at 82", I would like to place it inside the
>> house (ceiling : 8 ft / 96"😉 , instead of the garage for various
>> reasons. I was wondering if a ceiling height of 8' would hinder
>> the
>> pull up exercise. I figure my shoulders do not reach up past the
>> handle bar, and from the shoulder to top of my head should leave me
>> about 2-3" from the ceiling.
>>
>
> When you develop the strength to pull the bar to your chest, the tops
> of
> your shoulders will be above the bar. Any momentum also involved

increases

Quoted message said:

> the experience of pain as your head impacts the ceiling.
>
>> Next question is the foundation of the home, it is crawl space
>> foundation type, the various weight machines I am looking at varies
>> from 250-350 lbs, would I need to add any reinfocements in the crawl
>> space or generally this kind of weight, plus mine (160 lbs), so
>> figure
>> about 500 lbs loaded on around a 3'' x 5' area.
>
> Sorry, I haven't a clue on this one.

Ari, I believe this person is a f------d. How does he expect anyone to
be
able to figure out what his structural load is

55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10 psf
Top-dead(2), and 5 psf Bottom-dead(2). All building codes require that
the
stiffness factor be at least L/360 (though it's common to use L/480 to
minimize deflection or "bouncy" floor). The OP need not worry about
weight
causing structural failure. The only real concern would be cosmetic
(i.e.
cracks in a finished ceiling below, cracks in grout lines of a tile
floor,
dents/scruffs in a wood floor, etc.) As a general rule of thumb, you
almost
never need to worry about a load until it's 750+lbs. in a 1 s.f. area
(think
a FAT guy standing on one leg). Anything less than that will be fine.
Now
if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest he
consult a local Structural Engineer to further address his rooms
structural
capabilities.

(1) Live Loads are those loads that can come and go over the life of the
structure. This would typically include people and furniture, but may
include such things as wind, snow, and ice in roof applications. Most
building codes require a floor system to be able to withstand 40 psf
load.
Typically, a floor system will never see full live load unless it's
flooded
8-inches deep in water!
(2) Dead Loads are the weights of the building materials used in the
structure itself. This might include such things as the joists, subfloor,
carpet/padding, flooring tile, acoustic tile and sheetrock.

Holy [censored], Ari you sure know a thing or two about a thing or two.
What about factoring in the condition of the matierials? i.e. suppose we
are dealing with rot or termites etc affecting structural timbers?

Quoted message said:

Sorry 'Spammers' - confused you with someone else

In article <[email hidden]>,

Quoted message said:

I am considering a weight training machine to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

Thanks in advance!

Personally, I've brace the floor just to be safe.

There are jacks made for that. Check out a mobile home supply place.
--
Om.

"My mother never saw the irony in calling me a son-of-a-[censored]." -Jack Nicholson

In article <[email hidden]>,

Quoted message said:

I am considering a weight training machine to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

Thanks in advance!

Personally, I've brace the floor just to be safe.

There are jacks made for that. Check out a mobile home supply place.
--
Om.

"My mother never saw the irony in calling me a son-of-a-[censored]." -Jack Nicholson

I take it that you meant a 3' by 5' area, that is 15 square feet.
500#/15s.f. = 33.33 pounds per square foot. Your average house is designed
to sustain a 40 to 45 psf load on living rooms, kitchens and other public
rooms. Bedrooms on the other hand usally are about 30 to 35 psf.
Positioning of the machine also makes a difference. Near the end of the
joists is better than at the mid-span. I'd consider reinforcing the joists
below. If you have a concrete floor in your crawlspace a simple method
would be to attach a 4x4 to the joists and have it bear on the concrete.
Tony Manella
(structural designer by day, average joe by night)

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I am considering a weight training machine to work out at home, it has
a pull up bar located at 82", I would like to place it inside the
house (ceiling : 8 ft / 96"😉 , instead of the garage for various
reasons. I was wondering if a ceiling height of 8' would hinder the
pull up exercise. I figure my shoulders do not reach up past the
handle bar, and from the shoulder to top of my head should leave me
about 2-3" from the ceiling.

Next question is the foundation of the home, it is crawl space
foundation type, the various weight machines I am looking at varies
from 250-350 lbs, would I need to add any reinfocements in the crawl
space or generally this kind of weight, plus mine (160 lbs), so figure
about 500 lbs loaded on around a 3'' x 5' area.

Thanks in advance!

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"David" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
news:[email hidden]...

Quoted message said:

[email hidden] wrote:
> I am considering a weight training machine

Which "machine"?

> to work out at home, it has
> a pull up bar located at 82", I would like to place it inside the
> house (ceiling : 8 ft / 96"😉 , instead of the garage for various
> reasons. I was wondering if a ceiling height of 8' would hinder

the

Quoted message said:

Quoted message said:

Quoted message said:

> pull up exercise. I figure my shoulders do not reach up past the
> handle bar, and from the shoulder to top of my head should leave me
> about 2-3" from the ceiling.
>

When you develop the strength to pull the bar to your chest, the tops

of

Quoted message said:

Quoted message said:

Quoted message said:

your shoulders will be above the bar. Any momentum also involved

increases

Quoted message said:

Quoted message said:

the experience of pain as your head impacts the ceiling.

> Next question is the foundation of the home, it is crawl space
> foundation type, the various weight machines I am looking at varies
> from 250-350 lbs, would I need to add any reinfocements in the crawl
> space or generally this kind of weight, plus mine (160 lbs), so

figure

Quoted message said:

Quoted message said:

Quoted message said:

> about 500 lbs loaded on around a 3'' x 5' area.

Sorry, I haven't a clue on this one.

Ari, I believe this person is a f------d. How does he expect anyone to

be

Quoted message said:

Quoted message said:

able to figure out what his structural load is

55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10 psf
Top-dead(2), and 5 psf Bottom-dead(2). All building codes require that

the

Quoted message said:

stiffness factor be at least L/360 (though it's common to use L/480 to
minimize deflection or "bouncy" floor). The OP need not worry about

weight

Quoted message said:

causing structural failure. The only real concern would be cosmetic (i.e.
cracks in a finished ceiling below, cracks in grout lines of a tile floor,
dents/scruffs in a wood floor, etc.) As a general rule of thumb, you

almost

Quoted message said:

never need to worry about a load until it's 750+lbs. in a 1 s.f. area

(think

Quoted message said:

a FAT guy standing on one leg). Anything less than that will be fine.

Now

Quoted message said:

if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest he
consult a local Structural Engineer to further address his rooms

structural

Quoted message said:

capabilities.

Agreed. One other problem would be if he dropped a wheel on an area of the
floor that was not supported by a joist. OSB is the common material of
choice for subfloor and a 45# plate on edge, dropped from knee height, could
easily damage it if it landed between joists. The force would be greater
than 45 psi. If he doesn't get careless with the weights, he should be fine.

"John" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"David" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
news:[email hidden]...
> [email hidden] wrote:
>> I am considering a weight training machine
>
> Which "machine"?
>
>> to work out at home, it has
>> a pull up bar located at 82", I would like to place it inside the
>> house (ceiling : 8 ft / 96"😉 , instead of the garage for various
>> reasons. I was wondering if a ceiling height of 8' would hinder

the

Quoted message said:

Quoted message said:

>> pull up exercise. I figure my shoulders do not reach up past the
>> handle bar, and from the shoulder to top of my head should leave me
>> about 2-3" from the ceiling.
>>
>
> When you develop the strength to pull the bar to your chest, the

tops

Quoted message said:

of

Quoted message said:

Quoted message said:

> your shoulders will be above the bar. Any momentum also involved

increases

Quoted message said:

> the experience of pain as your head impacts the ceiling.
>
>> Next question is the foundation of the home, it is crawl space
>> foundation type, the various weight machines I am looking at varies
>> from 250-350 lbs, would I need to add any reinfocements in the

crawl

Quoted message said:

Quoted message said:

Quoted message said:

>> space or generally this kind of weight, plus mine (160 lbs), so

figure

Quoted message said:

Quoted message said:

>> about 500 lbs loaded on around a 3'' x 5' area.
>
> Sorry, I haven't a clue on this one.

Ari, I believe this person is a f------d. How does he expect anyone to

be

Quoted message said:

Quoted message said:

able to figure out what his structural load is

55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10 psf
Top-dead(2), and 5 psf Bottom-dead(2). All building codes require that

the

Quoted message said:

stiffness factor be at least L/360 (though it's common to use L/480 to
minimize deflection or "bouncy" floor). The OP need not worry about

weight

Quoted message said:

causing structural failure. The only real concern would be cosmetic

(i.e.

Quoted message said:

Quoted message said:

cracks in a finished ceiling below, cracks in grout lines of a tile

floor,

Quoted message said:

Quoted message said:

dents/scruffs in a wood floor, etc.) As a general rule of thumb, you

almost

Quoted message said:

never need to worry about a load until it's 750+lbs. in a 1 s.f. area

(think

Quoted message said:

a FAT guy standing on one leg). Anything less than that will be fine.

Now

Quoted message said:

if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest he
consult a local Structural Engineer to further address his rooms

structural

Quoted message said:

capabilities.

Agreed. One other problem would be if he dropped a wheel on an area of the
floor that was not supported by a joist. OSB is the common material of
choice for subfloor and a 45# plate on edge, dropped from knee height,

could

Quoted message said:

easily damage it if it landed between joists. The force would be greater
than 45 psi. If he doesn't get careless with the weights, he should be

fine.

Quoted message said:

Granted that would result in a "point load" however the floor would still be
fine (other than possible cosmetic damage). The subfloor (OSB or T&G
plywood are the most common) is usually 3/4" (sometimes the floor may
consist of 2 layers - but 3/4" is a minimum). The subfloor will take the
load and disperse it to a larger area than just the impact area. In any
case, dropping a plate will not pose a problem. Try this test at home,
stand on one leg, jump up and down, does your foot go through the floor?
The area of one of your feet is <1 s.f. and your weight is more than a 45#
plate. If your foot doesn't go through the floor than why would a plate?
Because it's made of steel?

I'll give another example: A typical Friday night at my house. I have a
queen "soft sided" waterbed (~800lbs.). On the bed let's say there's 600
lbs. (if I weigh 180lbs. that leaves 420lbs. for 3 fit females - and if
they're thin, maybe there's enough left over to allow a midget to join in).
Also, any weight being supported by the swing wouldn't count. So we have a
live load total of 800+600=1400lbs. The bed area is ~5'x7'=35s.f. Keep in
mind that the total load is being distributed over an area much greater than
35s.f. (i.e. adjacent joists are carrying a portion of the weight as
distributed by the subfloor). For "worst case scenario let's say the weight
WAS all compacted into the 35s.f. At a designed load of 40lbs. per s.f.
that would be 35s.f. x 40psf = 1400 lbs. So it would support the weight
fine. Also keep in mind that the floor is designed to carry the live load
with acceptable deflection (usually less than 1/2" of deflection/bend).
Exceeding the load doesn't necessarily mean immediate structural failure
(i.e. the bed and party goers end up in the basement). As the load goes up
the floor "flexes" more, up until the point of failure (the actual point of
failure depends upon a lot of factors but let's just say it's quite a bit
more).

Now to look further at my situation, my floor joists are spanning 13' and
are 16" o.c. (so the bed is bearing on 4 joist spans). So the floor area
the bed is located in is designed for a minimal deflection in an area of
13'x5.33'. 13x5.33 = ~69s.f. x 40psf (live load) = 2760 total lbs. in that
area. So in the above "Friday Night" example the 1400lbs. load (bed and
occupants) would still leave us with 1360lbs. of load before deflection
became unacceptable. So if the remaining load (1360lbs.) is spectators
(each 272lbs.) I could have 5 of them standing at the foot of the bed.
(BTW, the average 272lb. person is going to utilize ~6s.f.). So, (rounding
off the numbers) the area is 69s.f. (of which the bed is 37s.f. and the
spectators are 30s.f.). And the floor is designed to carry this weight. To
actually induce structural failure we'd have to start stacking spectators
vertically.

Now, here's an example of a structural failure that's not too uncommon.
Decks. Decks are not always designed to carry as heavy a live load and
being exposed to the elements can lead to degradation of the structural
members. Also, in areas with seismic movement or frost lines, footings can
"heave" which can cause problems. Another big factor leading to deck
failure is shoddy construction, either materials or methods, or both.
Put an 8 person hot tub on the deck, which can weigh 3500lbs.
(tub+water+people) all in an area of 7'x7' and you can start to see how it
can fail. Decks can also fail due to too many people on them at once. If a
fraternity house packs 50 people onto a 150s.f. deck you're asking for
trouble.

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"John" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"David" <[email hidden]> wrote in message
news:[email hidden]...
>
> "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
> news:[email hidden]...
> > [email hidden] wrote:
> >> I am considering a weight training machine
> >
> > Which "machine"?
> >
> >> to work out at home, it has
> >> a pull up bar located at 82", I would like to place it inside
> >> the
> >> house (ceiling : 8 ft / 96"😉 , instead of the garage for
> >> various
> >> reasons. I was wondering if a ceiling height of 8' would
> >> hinder

the

Quoted message said:

> >> pull up exercise. I figure my shoulders do not reach up past
> >> the
> >> handle bar, and from the shoulder to top of my head should
> >> leave me
> >> about 2-3" from the ceiling.
> >>
> >
> > When you develop the strength to pull the bar to your chest,
> > the

tops

Quoted message said:

of

Quoted message said:

> > your shoulders will be above the bar. Any momentum also
> > involved
increases
> > the experience of pain as your head impacts the ceiling.
> >
> >> Next question is the foundation of the home, it is crawl space
> >> foundation type, the various weight machines I am looking at
> >> varies
> >> from 250-350 lbs, would I need to add any reinfocements in the

crawl

Quoted message said:

Quoted message said:

> >> space or generally this kind of weight, plus mine (160 lbs),
> >> so

figure

Quoted message said:

> >> about 500 lbs loaded on around a 3'' x 5' area.
> >
> > Sorry, I haven't a clue on this one.
>
> Ari, I believe this person is a f------d. How does he expect
> anyone to

be

Quoted message said:

> able to figure out what his structural load is

55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10
psf
Top-dead(2), and 5 psf Bottom-dead(2). All building codes require
that

the

Quoted message said:

stiffness factor be at least L/360 (though it's common to use L/480
to
minimize deflection or "bouncy" floor). The OP need not worry
about

weight

Quoted message said:

causing structural failure. The only real concern would be
cosmetic

(i.e.

Quoted message said:

Quoted message said:

cracks in a finished ceiling below, cracks in grout lines of a tile

floor,

Quoted message said:

Quoted message said:

dents/scruffs in a wood floor, etc.) As a general rule of thumb,
you

almost

Quoted message said:

never need to worry about a load until it's 750+lbs. in a 1 s.f.
area

(think

Quoted message said:

a FAT guy standing on one leg). Anything less than that will be
fine.

Now

Quoted message said:

if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest
he
consult a local Structural Engineer to further address his rooms

structural

Quoted message said:

capabilities.

Agreed. One other problem would be if he dropped a wheel on an area
of the
floor that was not supported by a joist. OSB is the common material
of
choice for subfloor and a 45# plate on edge, dropped from knee
height,

could

Quoted message said:

easily damage it if it landed between joists. The force would be
greater
than 45 psi. If he doesn't get careless with the weights, he should
be

fine.

Quoted message said:

Granted that would result in a "point load" however the floor would
still be
fine (other than possible cosmetic damage). The subfloor (OSB or T&G
plywood are the most common) is usually 3/4" (sometimes the floor may
consist of 2 layers - but 3/4" is a minimum). The subfloor will take
the
load and disperse it to a larger area than just the impact area. In
any
case, dropping a plate will not pose a problem. Try this test at
home,
stand on one leg, jump up and down, does your foot go through the
floor?
The area of one of your feet is <1 s.f. and your weight is more than a
45#
plate. If your foot doesn't go through the floor than why would a
plate?
Because it's made of steel?

I'll give another example: A typical Friday night at my house. I
have a
queen "soft sided" waterbed (~800lbs.). On the bed let's say there's
600
lbs. (if I weigh 180lbs. that leaves 420lbs. for 3 fit females - and
if
they're thin, maybe there's enough left over to allow a midget to join
in).
Also, any weight being supported by the swing wouldn't count. So we
have a
live load total of 800+600=1400lbs. The bed area is ~5'x7'=35s.f.
Keep in
mind that the total load is being distributed over an area much
greater than
35s.f. (i.e. adjacent joists are carrying a portion of the weight as
distributed by the subfloor). For "worst case scenario let's say the
weight
WAS all compacted into the 35s.f. At a designed load of 40lbs. per
s.f.
that would be 35s.f. x 40psf = 1400 lbs. So it would support the
weight
fine. Also keep in mind that the floor is designed to carry the live
load
with acceptable deflection (usually less than 1/2" of
deflection/bend).
Exceeding the load doesn't necessarily mean immediate structural
failure
(i.e. the bed and party goers end up in the basement). As the load
goes up
the floor "flexes" more, up until the point of failure (the actual
point of
failure depends upon a lot of factors but let's just say it's quite a
bit
more).

Now to look further at my situation, my floor joists are spanning 13'
and
are 16" o.c. (so the bed is bearing on 4 joist spans). So the floor
area
the bed is located in is designed for a minimal deflection in an area
of
13'x5.33'. 13x5.33 = ~69s.f. x 40psf (live load) = 2760 total lbs. in
that
area. So in the above "Friday Night" example the 1400lbs. load (bed
and
occupants) would still leave us with 1360lbs. of load before
deflection
became unacceptable. So if the remaining load (1360lbs.) is
spectators
(each 272lbs.) I could have 5 of them standing at the foot of the bed.
(BTW, the average 272lb. person is going to utilize ~6s.f.). So,
(rounding
off the numbers) the area is 69s.f. (of which the bed is 37s.f. and
the
spectators are 30s.f.). And the floor is designed to carry this
weight. To
actually induce structural failure we'd have to start stacking
spectators
vertically.

Now, here's an example of a structural failure that's not too
uncommon.
Decks. Decks are not always designed to carry as heavy a live load
and
being exposed to the elements can lead to degradation of the
structural
members. Also, in areas with seismic movement or frost lines,
footings can
"heave" which can cause problems. Another big factor leading to deck
failure is shoddy construction, either materials or methods, or both.
Put an 8 person hot tub on the deck, which can weigh 3500lbs.
(tub+water+people) all in an area of 7'x7' and you can start to see
how it
can fail. Decks can also fail due to too many people on them at once.
If a
fraternity house packs 50 people onto a 150s.f. deck you're asking for
trouble.

If you drop a squat onto the pins, would the load be in the four points
of contact under the rack legs, and not distributed as in the other
examples you gave?

-S-
http://www.kbnj.com

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"John" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"David" <[email hidden]> wrote in message
news:[email hidden]...
>
> "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
> news:[email hidden]...
> > [email hidden] wrote:
> >> I am considering a weight training machine
> >
> > Which "machine"?
> >
> >> to work out at home, it has
> >> a pull up bar located at 82", I would like to place it inside

the

Quoted message said:

Quoted message said:

Quoted message said:

> >> house (ceiling : 8 ft / 96"😉 , instead of the garage for various
> >> reasons. I was wondering if a ceiling height of 8' would

hinder

Quoted message said:

Quoted message said:

the

Quoted message said:

> >> pull up exercise. I figure my shoulders do not reach up past the
> >> handle bar, and from the shoulder to top of my head should leave

me

Quoted message said:

Quoted message said:

Quoted message said:

> >> about 2-3" from the ceiling.
> >>
> >
> > When you develop the strength to pull the bar to your chest, the

tops

Quoted message said:

of

Quoted message said:

> > your shoulders will be above the bar. Any momentum also involved
increases
> > the experience of pain as your head impacts the ceiling.
> >
> >> Next question is the foundation of the home, it is crawl space
> >> foundation type, the various weight machines I am looking at

varies

Quoted message said:

Quoted message said:

Quoted message said:

> >> from 250-350 lbs, would I need to add any reinfocements in the

crawl

Quoted message said:

Quoted message said:

> >> space or generally this kind of weight, plus mine (160 lbs), so

figure

Quoted message said:

> >> about 500 lbs loaded on around a 3'' x 5' area.
> >
> > Sorry, I haven't a clue on this one.
>
> Ari, I believe this person is a f------d. How does he expect anyone

to

Quoted message said:

Quoted message said:

be

Quoted message said:

> able to figure out what his structural load is

55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10

psf

Quoted message said:

Quoted message said:

Quoted message said:

Top-dead(2), and 5 psf Bottom-dead(2). All building codes require

that

Quoted message said:

Quoted message said:

the

Quoted message said:

stiffness factor be at least L/360 (though it's common to use L/480 to
minimize deflection or "bouncy" floor). The OP need not worry about

weight

Quoted message said:

causing structural failure. The only real concern would be cosmetic

(i.e.

Quoted message said:

Quoted message said:

cracks in a finished ceiling below, cracks in grout lines of a tile

floor,

Quoted message said:

Quoted message said:

dents/scruffs in a wood floor, etc.) As a general rule of thumb, you

almost

Quoted message said:

never need to worry about a load until it's 750+lbs. in a 1 s.f. area

(think

Quoted message said:

a FAT guy standing on one leg). Anything less than that will be fine.

Now

Quoted message said:

if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest he
consult a local Structural Engineer to further address his rooms

structural

Quoted message said:

capabilities.

Agreed. One other problem would be if he dropped a wheel on an area of

the

Quoted message said:

Quoted message said:

floor that was not supported by a joist. OSB is the common material of
choice for subfloor and a 45# plate on edge, dropped from knee height,

could

Quoted message said:

easily damage it if it landed between joists. The force would be greater
than 45 psi. If he doesn't get careless with the weights, he should be

fine.

Quoted message said:

Granted that would result in a "point load" however the floor would still

be

Quoted message said:

fine (other than possible cosmetic damage). The subfloor (OSB or T&G
plywood are the most common) is usually 3/4" (sometimes the floor may
consist of 2 layers - but 3/4" is a minimum). The subfloor will take the
load and disperse it to a larger area than just the impact area. In any
case, dropping a plate will not pose a problem. Try this test at home,
stand on one leg, jump up and down, does your foot go through the floor?
The area of one of your feet is <1 s.f. and your weight is more than a 45#
plate. If your foot doesn't go through the floor than why would a plate?
Because it's made of steel?

I was only speaking cosmetically. The joists would be fine. The OSB would
probably be damaged. The edge of a wheel is <1 in^2. My civil/structural
engineering is a bit rusty, as I'm a lowly metallurgical engineer. :^)

"Steve Freides" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"John" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...
>
> "David" <[email hidden]> wrote in message
> news:[email hidden]...
> >
> > "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
> > news:[email hidden]...
> > > [email hidden] wrote:
> > >> I am considering a weight training machine
> > >
> > > Which "machine"?
> > >
> > >> to work out at home, it has
> > >> a pull up bar located at 82", I would like to place it inside
> > >> the
> > >> house (ceiling : 8 ft / 96"😉 , instead of the garage for
> > >> various
> > >> reasons. I was wondering if a ceiling height of 8' would
> > >> hinder
the
> > >> pull up exercise. I figure my shoulders do not reach up past
> > >> the
> > >> handle bar, and from the shoulder to top of my head should
> > >> leave me
> > >> about 2-3" from the ceiling.
> > >>
> > >
> > > When you develop the strength to pull the bar to your chest,
> > > the

tops

Quoted message said:

of
> > > your shoulders will be above the bar. Any momentum also
> > > involved
> increases
> > > the experience of pain as your head impacts the ceiling.
> > >
> > >> Next question is the foundation of the home, it is crawl space
> > >> foundation type, the various weight machines I am looking at
> > >> varies
> > >> from 250-350 lbs, would I need to add any reinfocements in the

crawl

Quoted message said:

> > >> space or generally this kind of weight, plus mine (160 lbs),
> > >> so
figure
> > >> about 500 lbs loaded on around a 3'' x 5' area.
> > >
> > > Sorry, I haven't a clue on this one.
> >
> > Ari, I believe this person is a f------d. How does he expect
> > anyone to
be
> > able to figure out what his structural load is
>
> 55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10
> psf
> Top-dead(2), and 5 psf Bottom-dead(2). All building codes require
> that
the
> stiffness factor be at least L/360 (though it's common to use L/480
> to
> minimize deflection or "bouncy" floor). The OP need not worry
> about
weight
> causing structural failure. The only real concern would be
> cosmetic

(i.e.

Quoted message said:

> cracks in a finished ceiling below, cracks in grout lines of a tile

floor,

Quoted message said:

> dents/scruffs in a wood floor, etc.) As a general rule of thumb,
> you
almost
> never need to worry about a load until it's 750+lbs. in a 1 s.f.
> area
(think
> a FAT guy standing on one leg). Anything less than that will be
> fine.
Now
> if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest
> he
> consult a local Structural Engineer to further address his rooms
structural
> capabilities.

Agreed. One other problem would be if he dropped a wheel on an area
of the
floor that was not supported by a joist. OSB is the common material
of
choice for subfloor and a 45# plate on edge, dropped from knee
height,

could

Quoted message said:

easily damage it if it landed between joists. The force would be
greater
than 45 psi. If he doesn't get careless with the weights, he should
be

fine.

Quoted message said:

Granted that would result in a "point load" however the floor would
still be
fine (other than possible cosmetic damage). The subfloor (OSB or T&G
plywood are the most common) is usually 3/4" (sometimes the floor may
consist of 2 layers - but 3/4" is a minimum). The subfloor will take
the
load and disperse it to a larger area than just the impact area. In
any
case, dropping a plate will not pose a problem. Try this test at
home,
stand on one leg, jump up and down, does your foot go through the
floor?
The area of one of your feet is <1 s.f. and your weight is more than a
45#
plate. If your foot doesn't go through the floor than why would a
plate?
Because it's made of steel?

I'll give another example: A typical Friday night at my house. I
have a
queen "soft sided" waterbed (~800lbs.). On the bed let's say there's
600
lbs. (if I weigh 180lbs. that leaves 420lbs. for 3 fit females - and
if
they're thin, maybe there's enough left over to allow a midget to join
in).
Also, any weight being supported by the swing wouldn't count. So we
have a
live load total of 800+600=1400lbs. The bed area is ~5'x7'=35s.f.
Keep in
mind that the total load is being distributed over an area much
greater than
35s.f. (i.e. adjacent joists are carrying a portion of the weight as
distributed by the subfloor). For "worst case scenario let's say the
weight
WAS all compacted into the 35s.f. At a designed load of 40lbs. per
s.f.
that would be 35s.f. x 40psf = 1400 lbs. So it would support the
weight
fine. Also keep in mind that the floor is designed to carry the live
load
with acceptable deflection (usually less than 1/2" of
deflection/bend).
Exceeding the load doesn't necessarily mean immediate structural
failure
(i.e. the bed and party goers end up in the basement). As the load
goes up
the floor "flexes" more, up until the point of failure (the actual
point of
failure depends upon a lot of factors but let's just say it's quite a
bit
more).

Now to look further at my situation, my floor joists are spanning 13'
and
are 16" o.c. (so the bed is bearing on 4 joist spans). So the floor
area
the bed is located in is designed for a minimal deflection in an area
of
13'x5.33'. 13x5.33 = ~69s.f. x 40psf (live load) = 2760 total lbs. in
that
area. So in the above "Friday Night" example the 1400lbs. load (bed
and
occupants) would still leave us with 1360lbs. of load before
deflection
became unacceptable. So if the remaining load (1360lbs.) is
spectators
(each 272lbs.) I could have 5 of them standing at the foot of the bed.
(BTW, the average 272lb. person is going to utilize ~6s.f.). So,
(rounding
off the numbers) the area is 69s.f. (of which the bed is 37s.f. and
the
spectators are 30s.f.). And the floor is designed to carry this
weight. To
actually induce structural failure we'd have to start stacking
spectators
vertically.

Now, here's an example of a structural failure that's not too
uncommon.
Decks. Decks are not always designed to carry as heavy a live load
and
being exposed to the elements can lead to degradation of the
structural
members. Also, in areas with seismic movement or frost lines,
footings can
"heave" which can cause problems. Another big factor leading to deck
failure is shoddy construction, either materials or methods, or both.
Put an 8 person hot tub on the deck, which can weigh 3500lbs.
(tub+water+people) all in an area of 7'x7' and you can start to see
how it
can fail. Decks can also fail due to too many people on them at once.
If a
fraternity house packs 50 people onto a 150s.f. deck you're asking for
trouble.

If you drop a squat onto the pins, would the load be in the four points
of contact under the rack legs, and not distributed as in the other
examples you gave?

-S-
http://www.kbnj.com

"Steve Freides" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"John" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Spammers_Should_Be_Shot" <[email hidden]> wrote in message
news:[email hidden]...
>
> "David" <[email hidden]> wrote in message
> news:[email hidden]...
> >
> > "spodosaurus" <spodosaurus@_yahoo_.com> wrote in message
> > news:[email hidden]...
> > > [email hidden] wrote:
> > >> I am considering a weight training machine
> > >
> > > Which "machine"?
> > >
> > >> to work out at home, it has
> > >> a pull up bar located at 82", I would like to place it inside
> > >> the
> > >> house (ceiling : 8 ft / 96"😉 , instead of the garage for
> > >> various
> > >> reasons. I was wondering if a ceiling height of 8' would
> > >> hinder
the
> > >> pull up exercise. I figure my shoulders do not reach up past
> > >> the
> > >> handle bar, and from the shoulder to top of my head should
> > >> leave me
> > >> about 2-3" from the ceiling.
> > >>
> > >
> > > When you develop the strength to pull the bar to your chest,
> > > the

tops

Quoted message said:

of
> > > your shoulders will be above the bar. Any momentum also
> > > involved
> increases
> > > the experience of pain as your head impacts the ceiling.
> > >
> > >> Next question is the foundation of the home, it is crawl space
> > >> foundation type, the various weight machines I am looking at
> > >> varies
> > >> from 250-350 lbs, would I need to add any reinfocements in the

crawl

Quoted message said:

> > >> space or generally this kind of weight, plus mine (160 lbs),
> > >> so
figure
> > >> about 500 lbs loaded on around a 3'' x 5' area.
> > >
> > > Sorry, I haven't a clue on this one.
> >
> > Ari, I believe this person is a f------d. How does he expect
> > anyone to
be
> > able to figure out what his structural load is
>
> 55 psf (pounds per square foot) = equates to 40 psf Top-live(1), 10
> psf
> Top-dead(2), and 5 psf Bottom-dead(2). All building codes require
> that
the
> stiffness factor be at least L/360 (though it's common to use L/480
> to
> minimize deflection or "bouncy" floor). The OP need not worry
> about
weight
> causing structural failure. The only real concern would be
> cosmetic

(i.e.

Quoted message said:

> cracks in a finished ceiling below, cracks in grout lines of a tile

floor,

Quoted message said:

> dents/scruffs in a wood floor, etc.) As a general rule of thumb,
> you
almost
> never need to worry about a load until it's 750+lbs. in a 1 s.f.
> area
(think
> a FAT guy standing on one leg). Anything less than that will be
> fine.
Now
> if the OP is deadlifting (and dropping) 1500+lb lifts, I'd suggest
> he
> consult a local Structural Engineer to further address his rooms
structural
> capabilities.

Agreed. One other problem would be if he dropped a wheel on an area
of the
floor that was not supported by a joist. OSB is the common material
of
choice for subfloor and a 45# plate on edge, dropped from knee
height,

could

Quoted message said:

easily damage it if it landed between joists. The force would be
greater
than 45 psi. If he doesn't get careless with the weights, he should
be

fine.

Quoted message said:

Granted that would result in a "point load" however the floor would
still be
fine (other than possible cosmetic damage). The subfloor (OSB or T&G
plywood are the most common) is usually 3/4" (sometimes the floor may
consist of 2 layers - but 3/4" is a minimum). The subfloor will take
the
load and disperse it to a larger area than just the impact area. In
any
case, dropping a plate will not pose a problem. Try this test at
home,
stand on one leg, jump up and down, does your foot go through the
floor?
The area of one of your feet is <1 s.f. and your weight is more than a
45#
plate. If your foot doesn't go through the floor than why would a
plate?
Because it's made of steel?

I'll give another example: A typical Friday night at my house. I
have a
queen "soft sided" waterbed (~800lbs.). On the bed let's say there's
600
lbs. (if I weigh 180lbs. that leaves 420lbs. for 3 fit females - and
if
they're thin, maybe there's enough left over to allow a midget to join
in).
Also, any weight being supported by the swing wouldn't count. So we
have a
live load total of 800+600=1400lbs. The bed area is ~5'x7'=35s.f.
Keep in
mind that the total load is being distributed over an area much
greater than
35s.f. (i.e. adjacent joists are carrying a portion of the weight as
distributed by the subfloor). For "worst case scenario let's say the
weight
WAS all compacted into the 35s.f. At a designed load of 40lbs. per
s.f.
that would be 35s.f. x 40psf = 1400 lbs. So it would support the
weight
fine. Also keep in mind that the floor is designed to carry the live
load
with acceptable deflection (usually less than 1/2" of
deflection/bend).
Exceeding the load doesn't necessarily mean immediate structural
failure
(i.e. the bed and party goers end up in the basement). As the load
goes up
the floor "flexes" more, up until the point of failure (the actual
point of
failure depends upon a lot of factors but let's just say it's quite a
bit
more).

Now to look further at my situation, my floor joists are spanning 13'
and
are 16" o.c. (so the bed is bearing on 4 joist spans). So the floor
area
the bed is located in is designed for a minimal deflection in an area
of
13'x5.33'. 13x5.33 = ~69s.f. x 40psf (live load) = 2760 total lbs. in
that
area. So in the above "Friday Night" example the 1400lbs. load (bed
and
occupants) would still leave us with 1360lbs. of load before
deflection
became unacceptable. So if the remaining load (1360lbs.) is
spectators
(each 272lbs.) I could have 5 of them standing at the foot of the bed.
(BTW, the average 272lb. person is going to utilize ~6s.f.). So,
(rounding
off the numbers) the area is 69s.f. (of which the bed is 37s.f. and
the
spectators are 30s.f.). And the floor is designed to carry this
weight. To
actually induce structural failure we'd have to start stacking
spectators
vertically.

Now, here's an example of a structural failure that's not too
uncommon.
Decks. Decks are not always designed to carry as heavy a live load
and
being exposed to the elements can lead to degradation of the
structural
members. Also, in areas with seismic movement or frost lines,
footings can
"heave" which can cause problems. Another big factor leading to deck
failure is shoddy construction, either materials or methods, or both.
Put an 8 person hot tub on the deck, which can weigh 3500lbs.
(tub+water+people) all in an area of 7'x7' and you can start to see
how it
can fail. Decks can also fail due to too many people on them at once.
If a
fraternity house packs 50 people onto a 150s.f. deck you're asking for
trouble.

If you drop a squat onto the pins, would the load be in the four points
of contact under the rack legs, and not distributed as in the other
examples you gave?

The load would be concentrated to the points where the rack rest on the
floor (not just the 4 corners, they are distributing the weight to the racks
cross members). Just like in the "bed" example the weight is distributed to
the bed legs (9 in the case of my bed). But the subfloor takes that weight
and distributes it over a much wider area. Let's take the example of a
person jumping and compare it to dropping a DL. If a 400lb. man jumps up
and lands on 2 feet everything would be fine (agreed?) So a 400lb. bar
dropped is different how? Now let's consider an 800lb. DL. There are 2
contact points with the floor (each roughly the same size as a persons
foot). So it'd be roughly equal to an 800lb. man jumping (or 2 400lb. men
jumping). The biggest difference between a man jumping and a bar being
dropped is the impact point spacing. A bar will hit the floor with wider
impact spacing, thus distributing the load over an even greater area ( and
therefore, more joists to carry the load).

Of course, at some point the subfloor will fail, but unless someone's
dropping 750+ lbs. it's not worth worrying about. Over 750lbs. and it might
be fine, but best to consult an engineer or architect to look at your actual
structural issues.