Classic Strap Bypass Barn Door Hardware Kit

Double Track Bypass Sliding Door Hardware: The Complete Guide

Table of Contents

1. Double Track Bypass Sliding Door Hardware
2. Dual Rail Barn Door Sliding Kit
3. How Much Clearance Is Needed for a Bypass Barn Door System?
4. Can You Install Bypass Barn Doors on Drywall?
5. Barn Door Hardware Options
6. Sliding Door Tracks Specifications
7. Heavy Duty Steel Bypass Sliding Barn Door Hardware Kit for Wood Doors
8. How Thick Are the Doors You Plan to Hang?
9. What Is the Total Width of Your Doorway Opening?
10. What Is the Minimum Wall Clearance Required for a Bypass Door?
11. Double Track Bypassing Sliding Barn Door Hardware Assembly
12. Dual Sliding Barn Door Hardware Set
13. Parallel Track Barn Door System
14. How to Install a Dual Rail Sliding Door System
15. Heavy Duty Bypass Barn Door Hardware Kit with Rollers
16. Double Track Wooden Sliding Door Mechanism

Wide closets, pantries, and wall openings don’t always have room for a swinging door, or for a single barn door that needs a full door-width of wall beside it. A double track bypass system solves both problems. Two doors hang on two parallel tracks, slide past each other, and cover a wide opening while not requiring clearance on either side of the opening.

This guide covers how the hardware works, the measurements you need before you order, and how the installation comes together.

Double Track Bypass Sliding Door Hardware

Double track bypass sliding door hardware uses two independent tracks, with one door on each. The inner track mounts directly to the wall. The outer track sits in front of it, held out by bypass brackets, so the outer door can glide past the inner door without touching it.

Because each door rides its own track, both doors move independently. You can open the left side, the right side, or stack both doors together. When closed, the doors line up evenly without the offset you see on some single-track designs.

Dual Rail Barn Door Sliding Kit

“Dual rail” is another name for a double track kit. Compared with a single-track bypass kit, which hangs both doors from one rail using bent hangers on the outer door, a dual rail kit offers:

• Independent movement: each door runs on its own rail.
• Flexible overlap: you set how much the doors overlap, rather than it being fixed by the hanger shape.
• Greater weight capacity: the load is shared across two tracks.

The trade-off is that a dual rail kit needs a little more space above the door for the bypass brackets. A single-track kit is simpler and uses less overhead clearance. For a full comparison, see our guide to single track vs. double track bypass barn door hardware.

How Much Clearance Is Needed for a Bypass Barn Door System?

Plan for clearance in three directions:

• Above the door: our Classic Strap Bypass Barn Door Hardware Kit needs 7-1/8” from the top of the door to the ceiling to fit the track, hangers, and brackets.
• Out from the wall: the distance from the wall to the outside edge of the outer door is 6”. Keep that space free of obstructions.
• Beside the opening: in order to fully clear the opening, you will need at least one door’s width of space on one side of the doorway. In cases where that is not possible, it’s recommended that you extend the track as far as it will go on both sides of the doorway to maximize your access to the opening.

The hardware holds the doors about 1/2” off the floor, which leaves room for floor guides and most uneven floors..

Can You Install Bypass Barn Doors on Drywall?

Yes, but never into drywall alone. Drywall can’t hold the weight of two doors, and we don’t recommend drywall anchors. The lag bolts must go through the drywall and into solid studs.

Our tracks are pre-drilled at 16” on center to line up with standard wall studs, for track lengths up to 8’ long.  If your studs don’t line up with the holes, install a header board first:

1. Use solid wood, not particle board or MDF.
2. Make it longer than the track and at least 10” tall to fit the bypass brackets.
3. A standard 1” board (3/4” actual) works for most jobs. Use a 2” board (1-1/2” actual) for extra strength.
4. Fasten the board securely into the studs, then mount the brackets to the board.

You can paint the header board before you hang it so it blends in with the wall or matches the hardware.

Barn Door Hardware Options

Bypass hardware is one of several styles. Here’s how the main options compare:

• Single track kits: hang one door, or two doors that part in the middle. Best for openings with wall space on one or both sides.
• Double track bypass kits: hang two doors on two parallel tracks. Best for wide openings with limited side wall, when you want each door to move independently.
• Single track bypass kits: hang two doors on one track. Best for rooms with lower ceilings, or when you want a simpler look.
• Triple bypass kits: hang three doors on three tracks. Best for very wide openings and room dividers.
• Concealed, bifold, and mini kits: suit minimalist looks, tight spaces, and cabinets.

Within the bypass range, you can also choose between front mount hangers (straps bolted through the face of the door) and top mount hangers (screwed into the top edge, so the door face stays clean).

Sliding Door Tracks Specifications

These are the key specifications for the Classic Strap Bypass kit.

The tracks and hangers are made from 1/4" thick powder-coated steel and come in two finishes, Flat Black and Brushed Nickel. Each kit supports up to 250 lbs and fits doors from 1-3/8" to 1-3/4" thick. You can set it up for 2, 3, or 4 doors.

Tracks come in 19 lengths: 4', 4'6", 5', 5'6", 6', 6'7", 7', 7'6", 8', 9', 10', 11', 12', 13', 14', 15', 16', 18', and 20'. Every track is pre-drilled at 16" on center to line up with standard wall studs on track lengths up to 8' long.

For space, the kit needs 7-1/8" from the top of the door to the ceiling, and it sits 6" out from the wall to the outer face of the outer door. All hardware parts are backed by a 5-year, no-questions-asked warranty.

Tracks longer than 7'6" ship in sections joined with junction plates, which keeps shipping manageable while still giving you one continuous rail.

Heavy Duty Steel Bypass Sliding Barn Door Hardware Kit for Wood Doors

Solid wood doors are heavy, so the hardware matters. Our bypass kits use 1/4” steel, which is thick enough to carry solid wood slabs without flexing or sagging over time. The powder-coated finish resists chips and scratches from daily use.

Each kit includes everything you need to mount your doors: tracks, bypass brackets, hangers, lag bolts, door stoppers, anti-jump system, and floor guides. The doors and handles are sold separately, so you can pair the hardware with one of our wood barn doors or a door you already own.

How Thick Are the Doors You Plan to Hang?

Measure door thickness before you order. The Classic Strap Bypass kit fits doors from 1-3/8” to 1-3/4” thick, which covers most standard interior doors and solid wood barn doors.

Thickness matters for two reasons. First, the hangers and the spacing between the two tracks are sized for that range, so a thicker door may rub against the other door. Second, front mount hangers bolt all the way through the door, so the bolts must match its thickness. If your doors fall outside this range, call us before you order.

What Is the Total Width of Your Doorway Opening?

Your doorway width sets both the door size and the track length. For a double track bypass setup, use this formula for each door:

(Width of doorway ÷ 2) + 4” = recommended width per door

This gives you at least 2” of overlap on each outer side of the opening and 2” of overlap where the two doors meet in the middle, so there are no gaps to see through.

Example: for a 60” opening, each door should be 60 ÷ 2 + 4 = 34” wide.

For height, match the doorway height or go 1” to 2” taller for extra coverage. Our guide to determining the correct size of barn door for your doorway has formulas for single, bi-part, single-track bypass, and triple bypass setups too.

What Is the Minimum Wall Clearance Required for a Bypass Door?

Wall clearance comes down to three measurements: depth, height, and side wall.

• Depth: allow 6” from the wall surface to the face of the outer door. 
• Height: allow 7-1/8” between the top of the door and the ceiling, or any crown molding, for the brackets and hangers.

If the trim around your doorway is thicker than usual, a header board can bring the track out far enough to clear it.

Double Track Bypassing Sliding Barn Door Hardware Assembly

The assembly is built in layers, from the wall outward:

1. Inside bypass brackets lag-bolt to the wall studs or header board. Each one uses a 3-1/2” large lag bolt through the track and a short lag bolt through the bracket.
2. Inside track attaches to the fixed spacers on the inside brackets.
3. Outside bypass brackets hold the outside track with track connector bolts.
4. Bracket connector bolts join the top of each outside bracket to the horizontal arm of the inside bracket. The oval slots let you slide the outside track forward or back to set the gap between the doors.
5. Door stoppers sit on both ends of each track to stop the doors at the open and closed positions.

The number of brackets depends on track length. For example, a 6’ track uses 5 brackets per rail, a 10’ track uses 8, and a 20’ track uses 15.

Dual Sliding Barn Door Hardware Set

A complete dual sliding set for two doors includes:

• Two tracks (joined with junction plates on lengths over 7’6”)
• Inside and outside bypass brackets
• Four hangers with rollers, two per door (front mount or top mount)
• Anti-jump system or anti-jump pads, two per door
• Four door stoppers with a hex wrench
• Two floor guide sets with screws and plastic anchors
• Lag bolts, washers, hex bolts, and acorn nuts

You’ll also need common tools: a drill with 3/16”, 3/8”, 1/8”, and 7/32” bits, 1/2” and 5/8” wrenches, a 4’ level, a tape measure, and a ladder. A stud finder helps. A router with a 1/4” bit is only needed if you want to cut a floor guide channel in the bottom of the doors.

Parallel Track Barn Door System

A parallel track system is the same idea described by its shape: two rails mounted side by side, one in front of the other. The parallel layout is what lets the doors pass each other freely.

This design also scales. Add a third parallel track and you have a triple bypass system, which covers even wider openings, such as room dividers, large closets, and home offices, while stacking three doors on one side.

How to Install a Dual Rail Sliding Door System

Plan on two people for this job, especially with longer tracks. Here’s the overview; the installation manual covers each step in detail.

1. Join the tracks. If a track is longer than 7’6”, connect the sections with junction plates and tighten them with a 4 mm hex wrench and 10 mm wrench.
2. Prepare the wall. Find and mark the studs. If they don’t line up with the 16” hole spacing, mount a header board.
3. Draw a level line. Measure the height of the actual door (not the doorway) and add 2”. Measure that distance up from the highest point of the floor and draw a level line at least as long as the track. If the line isn’t level, the doors will roll on their own.
4. Mark and drill. Center the track’s holes on the line, mark each hole, and drill 3/16” pilot holes.
5. Mount the inside bracket and track. Slide on the door stoppers, then bolt the inside brackets and track to the wall. Start with the end brackets, then fill in the rest.
6. Attach the outside track. Bolt the outside track to the outside brackets, lift the assembly into place, and connect it to the inside brackets. Keep the bracket connector nuts loose for now.
7. Hang the hardware on the doors. Keep the hangers at least 1” from the door edge. For front mount hangers, drill 3/8” holes through the door and put the acorn nuts on the front face.
8. Mount the doors. Lift the inner door between the two tracks first, then lift the outer door onto the outside track.
9. Install anti-jump parts, set the stops, and adjust. Add the anti-jump system, set the door stoppers for the open and closed positions, slide the outside track until the doors don’t touch, and tighten the lock nuts.
10. Install floor guides. With each door plumb, mark and drill 7/32” holes, insert the anchors, and screw down the guides. Wide openings may need more than one guide per door.

Anti-jump parts and door stoppers are required for safe operation. Don’t skip them.

Heavy Duty Bypass Barn Door Hardware Kit with Rollers

The rollers are what you feel every time you open the door. Our kits use polymer nylon wheels, so the doors glide quietly and smoothly along the steel track without the metal-on-metal noise of cheaper hardware.

The wheel groove sits over the track, and the anti-jump system underneath keeps the wheel from lifting off if a door is bumped or pulled hard. Combined with 1/4” steel hangers and a 250 lb capacity, the rollers are built to handle solid wood doors used every day.

Double Track Wooden Sliding Door Mechanism

Putting it all together, a double track wooden sliding door works like this: the rollers carry each door along its own steel rail, the bypass brackets keep the rails a set distance apart, the stoppers define where each door stops, and the floor guides keep the bottom of the doors steady and in line.

Wood doors are a natural fit for this mechanism. For the best look, pair the hardware finish with your door: flat black for rustic and farmhouse styles, brushed nickel for a more modern space.

Find the Right Bypass Kit for Your Space

Before you order, confirm four things: door thickness (1-3/8” to 1-3/4”), doorway width, 7-1/8” of ceiling clearance, and 6” of wall depth. With those numbers in hand, you can choose the right track length and door size.

Browse our double track bypass barn door hardware kits, or call our barn door specialists at 1-800-997-5085 (Monday to Friday, 9 a.m. to 5 p.m. ET) for help sizing your project.