I have taken the structural part of this build as far as I can from a theoretical point of view. Next I need to do some testing. Chestermiller, I will follow your advice and start small. Thank you very much for the enormous amount of help you provided. I couldn't have done it without you.
I...
That is a great observation Tom.G. The only thing I can say is that this worktable is not available to the public. Now that you have pointed that out, if this thing gets built, I'll plan on taping off the corners to prevent that from happening. I really don't need the extreme corners. I could...
Chestermiller, thank you for this information.
I might have thought that a factor of 3 would be enough for a safety margin, but I am a novice and I will defer to your judgement.
I took your calculation and plugged in the numbers for 1 1/4" tubing:
(Using the new figure for "I". Moment of...
I found a typo in one of my earlier equations
It should be:
δ = (2224N)(40in)^3/3(1.29x10^8N/in^2)(.0555in^4) = 1.42x10^8N-in^3/2.15x10^7N-in^2 = 6.60 in
Which makes both methods of calculating the deflection the same.
I have also done the math for using the next larger size (1 1/4")
Both...
One of the problems I keep running into is the large range of data for every category.
Here is some tensile strength/yield stress stats that says it is for A500 Steel:
Shaped Structural Tubing
------------Grade A---Grade B---Grade C---Grade D
Tensile strength
mn, psi---45 000-----58 000-----62...
I redid the calculations after correcting the Moment of Inertia from surface area to side of square
Moment of Inertia (I)= Side of Square (s^4 - s^4) / 12
I = (1 - .76^4) / 12 = .6664 / 12 = .05553 in^4Section Modulus = width x height squared / 6
(S) = (BH^2/6) - (bh^3/6H)
1/6 -...
jrmichler, I have tried to follow your instructions as best as I could.
These are the specs of the tubing I am considering using (as provided by the supplier):
Steel Square Tube A500/A513 (Welded) 1.000 X 1.000 X 0.120
If I found info on a website, I included the url below the statement.
For...
The formula I'm using for Moment of Inertia is Weight (W) x Length (l) = Moment of Inertia (M).
M = W x l
I wanted to find a website to augment my answer, but it turns out there are infinite variations on the formula.
(Although this one is not too bad...
Hi, I am trying to figure out how many 1" steel square tubing pieces it would take to support a 500lb weight extended out 40" on a cantilever.
I have seen Modulus of Elasticity figures ranging from .029 GPa to 200 Gpa for Steel. The steel I plan to use would be common hot rolled square tubing...