Recent content by reg7066

  1. R

    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    Good Question. I expect to have a couple people there to help me.
  2. R

    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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...
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    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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...
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    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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...
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    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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...
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    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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...
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    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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 -...
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    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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...
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    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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...
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    How Many 1 Steel Tubing Pieces to Support 500lb on 40 Cantilever?

    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...
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