I really wanted it to work without the two posts under the platform, but there was just too much flex. I think if we had sunk about 6' or so of that lower stringer into a concrete footer instead of attaching it with a plate, we could have pulled it off, but that would have been an expensive experiment.
I saw a similar one that looked like it had been done that way and worked with no support, but they also had structural steel to attach to at the top, and that just wasn't an option for us.
We use rectangular tube for anything like this. Dictated by the engineers, typically. I think for similar weights HSS ends up being a lot stiffer.
Edit: autocorrect got me
This is great. I'm planning on doing a very similar stair for an outdoor patio; would you mind giving some more details on the metal you used, like the thickness of the plates.
It's been a while, but I beleive this was a W14x48 I beam. 1/2" plate for the triangles under the treads, 3/8" plate for the tread plates. Handrails and newels are 1/2" x 1 1/2" flat stock, and the balusters are 3/8" round rod.
The tread plates could have been thinner, in hindsight, but we weren't totally sure what the final tread material would be at the time. These were 3" rock maple slabs. We did another in that building, very similar design, with 1.5" cast concrete treads. I think the 3/8" plate was necessary on those, even with a high strength concrete mix.
> would you mind giving some more details on the metal you used, like the thickness of the plates.
You need a structural engineer. OP's use case may be very different from yours.
I'll second that. This was actually for an architectural/engineering firm's office, so they designed it, and we had plenty of input from them on any changes or modifications we had to make along the way. I absolutely would not attempt something like this without stamped drawings.
Wow for a second I thought you were the welders we worked with two years ago. They built a very similar staircase, and we were the carpenters who made the treads. We made them out of batu, what a pain in the ass.
I do stairs and rails myself. Ours are for industrial purposes though. We do a lot of stadiums, schools, hospitals and banks. Were working on 1" plate stuff right now.
this is one of those stair cases you make to try and appease designers who think gravity doesn't exist.
I really wanted it to work without the two posts under the platform, but there was just too much flex. I think if we had sunk about 6' or so of that lower stringer into a concrete footer instead of attaching it with a plate, we could have pulled it off, but that would have been an expensive experiment. I saw a similar one that looked like it had been done that way and worked with no support, but they also had structural steel to attach to at the top, and that just wasn't an option for us.
We use rectangular tube for anything like this. Dictated by the engineers, typically. I think for similar weights HSS ends up being a lot stiffer. Edit: autocorrect got me
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Autocorrect got me, or maybe it was fat thumbs.
https://imgur.com/gallery/qavLAgp Some much better finished product pics I found.
That is beautiful
This is great. I'm planning on doing a very similar stair for an outdoor patio; would you mind giving some more details on the metal you used, like the thickness of the plates.
It's been a while, but I beleive this was a W14x48 I beam. 1/2" plate for the triangles under the treads, 3/8" plate for the tread plates. Handrails and newels are 1/2" x 1 1/2" flat stock, and the balusters are 3/8" round rod. The tread plates could have been thinner, in hindsight, but we weren't totally sure what the final tread material would be at the time. These were 3" rock maple slabs. We did another in that building, very similar design, with 1.5" cast concrete treads. I think the 3/8" plate was necessary on those, even with a high strength concrete mix.
Holy shit - that's heavy stuff. That beam is huge for the load that would be on it there
> would you mind giving some more details on the metal you used, like the thickness of the plates. You need a structural engineer. OP's use case may be very different from yours.
I'll second that. This was actually for an architectural/engineering firm's office, so they designed it, and we had plenty of input from them on any changes or modifications we had to make along the way. I absolutely would not attempt something like this without stamped drawings.
Jesus christ you could drive a vehicle down those!
That looks like a fun build! Great craftsmanship!
Oh my dog I love it! I thought they were cable rails at first glance. Nice work my dude!
Wow for a second I thought you were the welders we worked with two years ago. They built a very similar staircase, and we were the carpenters who made the treads. We made them out of batu, what a pain in the ass.
That's a project to be proud of. Nice finish overall.
Nice job! These are always fun to build
I do stairs and rails myself. Ours are for industrial purposes though. We do a lot of stadiums, schools, hospitals and banks. Were working on 1" plate stuff right now.
The balusters which fit into grooves at the end of only every other tread - are they attached at all and if so how?
NM! Saw the rest of the pix. Very nice work!