I need some help from the green screen structural / engineering brain trust. I am going to build a set of stairs like these for my shop but they will pivot at the top so I can winch them up out of the way so I want to limit the weight but want them safe. So my question is what size and thickness square tubing should I use the two side pieces? The length of the tubing will be 14 ft. Thank you for the help.
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Sizing square tubing for stairs
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Given that the stairs will only see the weight of a person or two, I would think that 2" X 3/16" or 2" X 1/4" would suffice. Please note that I am not an engineer or structural designer just been in the fabrication business for 20 years. Also, one thing you could also do if you wanted a bit more strength is to get the tubing in A500 grade B which is 50 ksi material as opposed to A36 which is 36 ksi yield.
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Originally posted by scott123456789 View PostAre you worried about that look? We got stairs for a deer blind made out of c-purloin and it would be much lighter than tubing yet stronger.
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Originally posted by Big H View PostI used 8" c purlin for the sides and step on mine and a cheap harbor freight electric hoist for mine. I made a spring loaded latch at the top to hold the weight until I am ready to lower it.
Thank you very much.....I like the latch idea, how do you reach the latch to release it? I have 16 ft eaves so the latch would be up there.
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Originally posted by RWB View PostThank you very much.....I like the latch idea, how do you reach the latch to release it? I have 16 ft eaves so the latch would be up there.
Mine is only about 9’ tonthe latch, but I just have a rope attached to the handle that easy to reach, and lets you unlatch it.
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Originally posted by Texas Grown View PostAlmost forgot about the OP's question. I used 1" square tube, 14ga., with the 6" ceeperlin. It's more than enough for a man. The more vertical the angle of the ladder, the stronger it will be.
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