Today, I gonna make a DIY herringbone stairs, with my own design. I don't want to use too much wood but when use steel, the steel stairs stringer, the column below stairs prevent view and air, I want it look like fly stairs as much as it can. So I re-design and made one. For this project, most of time, 90%, I made this with just one person, me. So be careful.
License: CC BY NC SA (https://creativecommons.org/licenses/by-nc-sa/4.0/).
This stairs use to connect first to second floor, only one way, so I take around the building and make a sketch for the first design.
Of course, I need to design in 3d view, I want to see every angle of stairs. For this, I use SketchUp on web.
Let's make it more clearly. All details have designed. With this drawing, I can calculate how much materials I need.
First, I've made main bearing structure. Most of herringbone stairs use standing pillar to support stairs, for me, it's not pretty at all, I want the steps to fit into the main load-bearing structure, less is more. I've weld main structure first, then use truckle to pull it up in position. This is most heavily job that i have to do, I tight the structure with rope and rotate the truckle. Finally here:
Keep finish main load-bearing structure left. Then welding each step on ground then bring it up like image below, step by step.