Cantilevered spiral staircases are supplied with a stainless steel centre column and either natural stone or timber treads, without any visible support structure.
There are a number of balustrade options, including stainless steel, glass and timber, in a variety of different designs.
Maidenhead cantilevered spiral
Spiral UK have recently completed a cantilevered stone tread spiral stair on a luxury new house built overlooking the River Thames nr Maidenhead.
Beetham Tower Penthouse
Spiral Construction have just completed two stunning stone spiral stairs in the new Beetham Tower, Birmingham's highest building.