Properly installed gibs will have what amount of friction when doors are operated?

When elevator doors are operated, properly installed gibs should provide only a small amount of friction. The gibs serve as guides that help to align and support the door panels as they move. The primary function of these components is to ensure smooth operation while preventing any excessive resistance that could hinder door movement or cause wear over time.

Minimal friction is necessary for effective operation; too much friction can lead to difficulties in door operation, making it difficult for the doors to open and close smoothly. Conversely, having no friction would suggest that the doors are not adequately guided, which could lead to misalignment or failure to seal properly. Therefore, a small amount of friction is optimal, enabling the doors to operate smoothly while maintaining structural integrity and proper alignment during use.