Spiral stair with curved solid rod steel railing

Spiral stair with curved solid rod steel railing
Description
Spiral stair with curved solid rod steel railing

Specification: 
Stringer 114*4mm in sus304
Center Post 76*4mm in sus304
Tread support 2pcs 40*40*5mm in carbon steel
Stair tread 60mm thickness solid wood
Railing # height 36''/42''/1000mm
Baluster 42mm in sus304
Solid rod 8mm in sus304
Top handrail 42mm in sus304

Solid wood stair tread options:


Color for the stairs tread can be customized.
Below are some regular color for reference and choose: