im a student making a i beam from scratch i need to know the weight i
can hold them without having deflection dimensions are 1/8" steel
3' in the midddle 3' top and bottom if any one has info they can help
plz contact me

On Mon, 14 Jan 2008 22:00:35 -0800, los730 wrote:

im a student making a i beam from scratch i need to know the weight i
can hold them without having deflection dimensions are 1/8" steel 3'
in the midddle 3' top and bottom if any one has info they can help plz
contact me

Zero, zip, nada, none.

Add one extra hydrogen atom to the middle of your beam, and there'll be
some infinitesimal amount of bending to go with it.

You need to ask how much load can you put on for a certain amount of
deflection. You also need to specify the length of the beam and how the
ends are supported. Finally, do you really mean three _feet_, as in
almost one meter?

--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html

If you are an ENGINEERING student, get off your arse and do some research.
Google for " beam deflection" and you should be able to find a plug in
formula to do the job for you. You should know that every beam will have
some deflection, even if very small. Using computer programmes to do
calculations without understanding the basis of the calculation is a recipe
for disaster.




wrote in message
...
im a student making a i beam from scratch i need to know the weight i
can hold them without having deflection dimensions are 1/8" steel
3' in the midddle 3' top and bottom if any one has info they can help
plz contact me

Grumpy wrote:
If you are an ENGINEERING student, get off your arse and do some research.
Google for " beam deflection" and you should be able to find a plug in
formula to do the job for you. You should know that every beam will have
some deflection, even if very small. Using computer programmes to do
calculations without understanding the basis of the calculation is a recipe
for disaster.


What he said, and ....

Learn to use thge shift key!

Use clear, written out measurements, too.

3 feet by 3 feet?

Learn to cook. It's likely that, or starve!

Cheers
Trevor Jones

If you are an ENGINEERING student, get off your arse and do some research.

He isn't an English major.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty

Tim Wescott wrote:
On Mon, 14 Jan 2008 22:00:35 -0800, los730 wrote:


im a student making a i beam from scratch i need to know the weight i
can hold them without having deflection dimensions are 1/8" steel 3'
in the midddle 3' top and bottom if any one has info they can help plz
contact me


Zero, zip, nada, none.

Add one extra hydrogen atom to the middle of your beam, and there'll be
some infinitesimal amount of bending to go with it.

Worse, the beam will deflect under its own weight. A thin enough,
long enough beam will collapse under its own weight!

Jon

Tim Wescott wrote:
On Mon, 14 Jan 2008 22:00:35 -0800, los730 wrote:


im a student making a i beam from scratch i need to know the weight i
can hold them without having deflection dimensions are 1/8" steel 3'
in the midddle 3' top and bottom if any one has info they can help plz
contact me


Zero, zip, nada, none.

Indeed. There's a difference between deflection and visible deflection,
and I imagine it's the latter you're actually concerned about.

Best wishes,

Chris

On Jan 15, 5:57 am, "Stupendous Man" wrote:
If you are an ENGINEERING student, get off your arse and do some research.

He isn't an English major.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty


As someone else pointed out the units are strange, and the length is
missing, 1/8 inch plate 3 feet wide? buckling will be a big problem,
and simple beam calculations will not be enough. 3 inches might be
believable, that would be about 1/2 as thick in the web and 1/3 in the
flange as a W4x13 (smallest one in the 9th ed. ASD manual)

Actually, he just said "student", I'm guessing middle school, maybe
I'd buy high school if he is not an native English speaker. If he
can't communicate with his boss/team members/the people actually
building things he designs, he won't be working as an engineer.
If he charges a customer for a dozen hamburgers when they order one,
he won't be flipping burgers either. While one does not need to be an
English major, text message speak is doubleplusungood.

Curmudgeonly; Jay

On Tue, 15 Jan 2008 19:48:49 +1100, Grumpy top-posted:

If you are an ENGINEERING student, get off your arse and do some research.
Google for " beam deflection" and you should be able to find a plug in
formula to do the job for you. You should know that every beam will have
some deflection, even if very small. Using computer programmes to do
calculations without understanding the basis of the calculation is a recipe
for disaster.


He's a googlie - he'll never come back to look for answers; he expects
the answer(s) to show up in his email.

On AOL. ?:-/

Thanks,
Rich

wrote in message
...
im a student making a i beam from scratch i need to know the weight i
can hold them without having deflection dimensions are 1/8" steel
3' in the midddle 3' top and bottom if any one has info they can help
plz contact me