Recent content by Freelander

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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    It must be frustrating for you to field questions from stupid people like me. My apologies.
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    That's not hypothetical. The load would be centred. I mean an evenly thick load is heaviest in the middle no?
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    How can I explain. It might be a length of 56 inch wide conveyor belt hanging vertically. A flat one inch wide thing would still be heavier in the middle, hypothetically would it not? In any case a centre point load is the least desirable of the possible situations. Then the question would be...
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    If such a lift were to happen it might already have been refused because of clearance and wind factors possibly today.
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    Then I can calculate a design/safety factor. Which I expect to be below 1.
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    'Safe' is stupid. Minimum breaking strength is what I want to know.
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    Okay. The weld is the whole way around. It is a butt weld. There's at least 5 passes. It's built up a 1/4 inch. Hard corner on the 4 inch tube was chamfered. Test lift was already done. Load safety device on the crane read 35,000. So the actual load on the beam is less: 2,000 lb block, weight...
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    Sorry is that even remotely a useful diagram? Also: it is well understood that I am not getting professional advice. I simply lack the google fu or knowledge to even ballpark the safe UDL of such stuff. I do not understand nor can calculate modulus of elasticity stuff or whatever.
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    I will send a napkin CAD within the hour.
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    A500 has a lower UDL before deformation? I want to know the best and worst case scenarios, best steel and thickest wall and worst steel and thinnest wall or please all 4 combos. I am a stupid labourer being asked to do a sketchy lift and want to know some real material engineering numbers. I...
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    Will a 4x4 Steel Tube Fail Under 35-40,000 lbs?

    Have a lifting yoke with 7/8 inch lifting eyes welded onto the ends of a 3/16 or 1/4 inch wall 4x4 a500 or a513 square steel tube. Expected UDL is as much as 35-40,000 lbs. Is this tube going to fail?
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