Whats the load at which the beam will bend?

Sure, I'll help you out.

If your a student, please review Machinery's Handbook.

If your just a layman who has a home project.

I not actually going to do it, unless you are really are struggling.

There are shareware programs on the market that can do this, Beam boy for one.

google it and this should get you on you way.

Phoenix911

Thanks Phoenix 911 :)

So now on to the follow up..

I am a layman, with a friend with a home project...

But I have access to a Machinery's Handbook (I'm a draftsman in a machine shop)

Anyway I looked thru some of the information there and was able to calculate the following.

Moment 4.85

The Modulus of Elasticity 27.6 for SS (lb-in^2 x 10^6) (from a website)

I'm attempting the following forumula...

Wl^3/3EI = Deflection at Load

W=LOAD

l= length from support to load (48")

E= Modulus of Elasticity

I= Moment of inertia

For the load I'm trying between 200-2000lbs

So I have:

200 X 48^3 / 3 X 27.6 X 4.85

22118400 / 401.58

55078.44 ????

So what am I missing?

You left out the 10^6 in the value for E, making your deflection value 1,000,000 times too high.

Didn't look further, so I won't say if the formula is appropriate.

Sweet

So my deflection is .055" at 48" with 200 lbs

and

.551" at 48" with 2000 lbs

Thank you all very much :)

Sorry I did not get back to you sooner, looks like you found what you looking for.

The beam will bend progressively as soon as load is applied and increased.

It will be safe from permanent bending with a safety factor of two when you reach 50% of yield stress.

As the previous replier says, you need to use classic bending theory calculations which are obtainable in all strength of materials books.

It sounds like a very large washing line post.

I find the yield strength of 304 SS to be 30,000 (0.2 Per Cent Yield Strength psi)

Does this mean that regardless of the size of the beam I use I cannot exceed a 30,000 lb load?

Nop.

Note the Strength unit in PSI - Pound per Square Inch. Amount of load is depend on area the load applied on.

Also with your tube, how is it supported on the wall? Only the side facing the wall is supported? Or bracket on 3 face?

If supported only on one face, the wall will support the tube when loaded along the supported face. Side load will see less support and tube will bend between the supports.

Pineapple

It will be secured to an adjacent wall every 8 feet and bolted securely to the ground.

1. You also have to consider the type/capacity of material and way of securing your tube ( on wall)
2. capacity(Stensiel stress) of bolts you are using.
3. Type of Wall construction
4. type of load (immediat impact, dead load or live load)

bolted securely to the ground.

1. type of foundation

Check Out Column at Wikipedia.

Is this square tubing already installed.

There's machinery specifically designed to bend square tubing of that size and larger with a radius. I would suspect that the bend is required for some other application and should be bent prior to installing.

Otherwise I don't see anyway of bending that material without cutting a wedge from the material and welding it. If you cut wedges out in three or four places you can almost bend it by hand. 1/8" material isn't that hard to bend when you have 2' of leverage on a piece 4" wide.

How else are you going to get a piece of machinery up 26' to bend it?

I'm not an engineer, but I am quality control and I do the outsourcing for a company that manufactures machinery using both stainless steel and mild steel raw materials in different forms and 4x4x1/8"w. SS Square Tubing is one of them.

If I have a requirement for square tubing to be bent maintaining a raduis without cutting, I have an outside fab shop that is equipped for bending square tubing up to 8x8x1/4"w mild steel.

I think my first question to your situation is "Can it be done?" before I worry about how much force I need to do it.