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Model: Alvantor Step Ladder,Ultra-Thin Folding Step Stools 330 lbs Capacity, 2-Inch Thin for Storage, Anti-Slip Pedals & Handrails, Sturdy Steel for Home
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Steel does not exhibit stress fatigue. If properly maintained it can last indefinitely so long as stresses applied remain under it's yield point. Aluminum slowly develops micro fractures over time even when stressed beneath it's yield point, a phenomena known as stress fatigue.
Realistically, aluminum ladders are lightweight and great and most won't use them enough for this effect to matter. That said, they aren't better in all respects, long term reliability under constant hard use (and potentially absolute strength) being one (possibly two) of those.
Very welcome. I only have information to share because others were generous enough to do so with me. We must try to always educate and support each other : )
That sounds like a classic stress fatigue failure. The closer to the yield point aluminum is taken repeatedly, the faster it fatigues...and it can be a dramatic effect. People also forget about acceleration effects on stress. When someone steps down quickly, their mass must be decelerated by the ladder rung more rapidly, thus greater acceleration, thus greater force, greater stress, greater strain inching toward the yield point.
All that friggin said...I too, still buy aluminum ladders most of the time
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Steel, so heavy compared to something similar in aluminum.
Steel does not exhibit stress fatigue. If properly maintained it can last indefinitely so long as stresses applied remain under it's yield point. Aluminum slowly develops micro fractures over time even when stressed beneath it's yield point, a phenomena known as stress fatigue.
Realistically, aluminum ladders are lightweight and great and most won't use them enough for this effect to matter. That said, they aren't better in all respects, long term reliability under constant hard use (and potentially absolute strength) being one (possibly two) of those.
Last edited by luckydog97 June 14, 2026 at 08:11 AM.
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Realistically, aluminum ladders are lightweight and great and most won't use them enough for this effect to matter. That said, they aren't better in all respects, long term reliability under constant hard use (and potentially absolute strength) being one (possibly two) of those.
That sounds like a classic stress fatigue failure. The closer to the yield point aluminum is taken repeatedly, the faster it fatigues...and it can be a dramatic effect. People also forget about acceleration effects on stress. When someone steps down quickly, their mass must be decelerated by the ladder rung more rapidly, thus greater acceleration, thus greater force, greater stress, greater strain inching toward the yield point.
All that friggin said...I too, still buy aluminum ladders most of the time
23 Comments
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If it folds in half and you land on your head. They will grant you an unconditional refund.
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Our community has rated this post as helpful. If you agree, why not thank luckydog97
Realistically, aluminum ladders are lightweight and great and most won't use them enough for this effect to matter. That said, they aren't better in all respects, long term reliability under constant hard use (and potentially absolute strength) being one (possibly two) of those.
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Leave a Comment