Hardware installed, there must be a strong security. Open-close. When you open the door-window until then there must be a device to accommodate or prevent bump with appropriate equipment, damage to the door-window or wall and related sections.
Hardware installed must have stability. Open - close When opening the doors - windows out fully. It must be compatible device Or shock protection With the right equipment Prevent damage to the door - or window and wall sections involved.
Hardware installed, stability, strong, open and close easily. When opening the door - the window until the end and to support or cover with the proper equipment.And the parts involved.