A chaise lounge is essentially a long, one-armed upholstered seat, so it moves much like a small sofa. Its length is the main challenge in doorways and on stairs.
Pro tip: Because a chaise has only one arm, the balance is uneven; the person on the heavier armed end should expect more weight.
Watch out: Do not lift a chaise by its single arm, since the arm is not built to bear the whole weight and can pull away from the frame.