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Box Rail Bypass Barn Door Hardware Kit Interior & Exterior (400 lb)

RealCraft’s line of Box Rail Bypass Barn Door Hardware sets the industry standard, starting with better raw materials and offering more flexibility for the install process...but the secret is in the trolley! The craftsmanship that goes into our trolleys is unmatched, featuring years of smooth operation and dependability.

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Lag bolts are used to attach the track to the wall. Choose our lag bolts for a matching stainless steel finish.


All RealCraft barn door hardware kits are machined in Washington State, USA.


Our color hardware finishes are powder-coated steel. Unfinished raw steel is just that - the metal is not treated, and it's intended to have a worn and weathered look over time. The material is susceptible to pitting and rust, giving the hardware a time-worn look that meshes well with rustic, shabby chic, and industrial design schemes.


This hardware ships free within the continental United States. Free shipping excludes expedited shipping, international shipments, and oversize orders that require LTL shipping. Fast lead time: In-stock items ship in 1-3 days! Most orders ship same day if ordered by 12 PM Pacific time.


Doors are not included with the purchase of hardware.


If you have questions, or if your project requires special consideration, please call 1-800-694-5977. We'd be happy to help!




Bypass Doors for two doors:


Soffit Mounted:For bypass doors that are soffit mounted within the opening, measure the opening width. Choose the rail size that is larger than the opening (see the "Actual Rail Lengths" chart below)--the rail can be cut onsite to exactly fit the opening size.

Wall Mounted:For some applications, bypass doors need to slide in front or behind each other and then stack on the wall next to the opening. In this case, measure the width of the doors, plus the additional width of one of the doors, since they will be stacking on top of each on the side of the opening. For example, if you have two 3'W doors, you would need a minimum of 9' of track. Of course some applications may require more track if you are trying to get the doors to cover another opening, etc. For help determining the amount of track you will need for your application, please call us.


Bypass Doors for more than two doors:


Soffit Mounted:Any amount of doors can be put on the two parallel tracks of the bypass set-up. Often, people will use three doors, putting two doors on the front track, and one door on the back track (or vice-versa). Please call for help determining the kit you will need.


Wall Mounted: Any amount of doors can be put on the two parallel tracks of the bypass set-up. Often, people will use three doors, putting two doors on the front track, and one door on the back track (or vice-versa). Please call for help determining the kit you will need.




Use this chart to determine the exact length and amount of rail you will receive:





Call us for custom applications at 1-800-694-5977


Technical Guides

Cut Sheet
Bypass Cut Sheet
Lock Joint Instructions
Installation Instructions

Weight Limits**
 Steel Wheels150 
Aero /Prop FT Kits150 lb. door200 lb. door 
Classic/Hammered FT & SS Kits400 lb. door400 lb. door 
Horseshoe FT Kit
550 lb. door550 lb. door 
Industrial Duty FT Kit
800 lb. doorN/A 
Box Rail /Stainless Box RailN/A400 lb. door 
Swiss/Hex Bar KitN/A300 lb. door 

**Rating per pair of hangers


NOTE: Doors not included in kit. For do-it-yourself sliding doors, see RealCraft Barn Door Kits. For other, high quality doors, visit Real Carriage Door Co.

NOTE: Unfinished galvanized steel hardware has variances throughout its surface, which should be considered when selecting your finish.




Bypassing barn doors can slide in front or behind one another. This bypass door track is great for both interior and exterior sliding doors. Our bypass box rail sliding hardware is available in unfinished galvanized steel or a variety of powder-coated finishes including black and oil-rubbed bronze.

Product Reviews

Why RealCraft?

The Best Materials

Our exclusive hardware product lines are made using the best raw materials. We make hardware that is durable and beautiful.

Made To Last

We are proud to offer products that are crafted using traditional building methods. We make hardware that will last for generations.

Exclusive Designs

Only at RealCraft you will find some of the most unique and modern barn door hardware designs on the market. We make hardware that stands out.

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