Box track is a top hung system, where the track is mounted over on opening of top. Door panels are outfitted with hanger assemblies that ride in the track. The track is attached to the building by brackets of face fix or soft fix. These brackets give the track stability and strength and prevent the enclosed track from opening up over time. The weight of the door is supported only by the track system. A bottom guide/roller is used to stabilize the bottom of the door. The hanger assemblies (rollers) that attach to the door and ride in the track, offers adjustability to accommodate various door thicknesses. The hanger assembly also allows for limited up/down adjustability for the door, making installation easier. Door Weight Capacity: The enclosed box track design offers increased rigidity to the track allowing this type of sliding door hardware to accommodate heavier doors. Modern day enclosed track feature the following capacities: HEAV DOOR SLIDING TRADER : HEAVY DOOR SLIDING SUPPLIAR : HEAVY DUTY SLIDING TRACK AND ROLLERS IN AHMEDABAD : HEAVY DUTY SLIDING DOOR TRACK AND ROLLERS HARDWARE TRADER : HEAVY DUTY DOOR SLIDING ROLLER AND TRACK ACCESSORIES SUPPLIAR : BARN SLIDING DOOR HARDWARE HEAVY DUTY : HEAVY DUTY BARN SLIDING DOOR HARDWARE IN AHMEDABAD: HEAVY DUTY INDUSTRIAL SLIDING DOOR TRACK AND ROLLERS TRADER : INDUSTRIAL SLIDING DOOR TRACK AND ROLLERS HEAVY DUTY IN AHMEDABAD : HEAVY DUTY EXTERIOR BARN DOOR SLIDING FITTINGS HARDWARE KIT & SYSTEM HEAVY DUTY SLIDING DOOR WHEEL IN AHMEDABAD : SLIDING DOOR GEAR HEAVY DUTY SUPPLIAR IN AHMEDABAD