If the track needs to be a bigger than 9 ft it needs to be in two parts. Hardware works with doors of 1-1/4" to 2 " thickness. We tested 150lbs on one door (2hangers) one track and it held fine. We estimate the track and hangers will hold 200 or more lbs if installed correctly into studs.The item "Top mount Sliding Barn Door Hardware Kit 6ft 12ft Rustic black Raw Steel" is in sale since Monday, December 4, 2017. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Doors & Door Hardware\Other Door Hardware". The seller is "veym2413" and is located in Salt Lake City, Utah. This item can be shipped to United States.