The basic components of spiral staircase;

1) a central column composed of steel continuous sleeve tread hubs;

2) steel balustrades and rails;

3) wood or toughened glass treads; The minimum steps is 13;

The basic components of wood-steel staircase (twin stringers--x-shaped frame);

1) twin stringers mainly in the form of x-shaped frame or zigzag frame;

2) steel balustrades and rails;

3) wood or toughened glass treads; The minimum steps is 13;

The basic components of wood-steel staircase (square pipe);

1)mono stringer made of steel square pipe mainly in 3 colors--black, milky white and flash silver;

2) steel balustrades and rails;

3) wood or toughened glass treads; The minimum steps is 13;