Kolbe’s Ultra Series TerraSpan Lift and Slide doors are designed for especially large openings. The doors can incorporate up to 10 panels per unit with a maximum panel dimension of 6 feet wide and 12 feet high. TerraSpan units feature architecturally correct coped corners, ADA-compliant bottom panel rails, energy-efficient glass and sill options, and a choice of screens, hardware, finishes, exterior colors, and interior wood species.
The door’s panels lift off the sill to glide smoothly, the firm says, and can pocket into a wall or stack together. They can be arranged in more than 900 operational configurations, including 90-degree corner units.

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