steel stair spine

1) The steel spine is used for carrying treads in the wood-steel staircases;
2) For the risers, there\\\\\\\'re 2 types for choosing: the height-adjustable twin tubular bar and the height-fixed mono tubular bar;
3) Welded steel spine and self-assembled spine for choosing;
4) Material: q235 common carbon steel;
5) Colors: black, milky white, flash silver;
6) Specifications: both standard and custom made available, pls contact us for details;