Albina recently spiral rolled 4 pieces of 14"OD X .500" WALL A53 GR B WHEELED to a 9'-4" plan view radius for both the spiral and landing support sections of the lobby spiral staircase in the Volvo Cab Assembly Building. Our Induction Heat Source and Increment Bending Method Produces Extremely Tight Spiral Bends to Industry Leading Quality AESS Standards. Check out our photo gallery of projects.