J Strap Heavy Duty Sliding Barn Door Hardware Kit

Door weight: Up to 400 lbs with the standard two-hanger setup on color-matched steel wheels. If you add the Delrin wheel upgrade, capacity drops to 200 lbs per door — check your door weight against that before selecting it. For 600 lbs, add a third roller through our custom quote page, or see the heavy duty horseshoe, which reaches 600 lbs on a stock kit. Under 200 lbs and one of the four standard duty finishes works for you? The standard J-strap kit covers that at lower cost.

Door thickness: 1-3/8 in to 2-1/4 in.

Door width and hanger count: Two hangers handle doors up to 48 in wide. Between 48 and 60 in, a third hanger is optional. Above 60 in it's required. A third hanger isn't a checkout option — request one on our custom quote page with your door width and we'll spec it.

Wall clearance beside opening: Must equal full door width on the slide side. Limited clearance? See bypass or bifold hardware.

Ceiling clearance above the door: 5-1/2 in minimum, measured above the top of the door — not above the rough opening. A taller door raises the track, so measure against your final door height. If you're short of that, the standard duty straight strap and horseshoe fit in 4 in — but only consider those if your door is also within standard duty's 125 lb and 250 lb ratings and 1-3/4 in thickness limit.

Wall header: A 1×6 hardwood header board is the minimum for every installation — oak, maple, or poplar, not pine. It spreads the load, and it decouples the track's bolt spacing from your stud spacing, since the track's mounting holes rarely line up with studs. This matters more here than anywhere else in the lineup: a 400 lb door concentrates serious load at the mounting points. Run the board past the length of the track to the next stud on each side and lag-bolt it into the framing with 3/8 in × 3 in lag bolts. Never mount to drywall alone. If your wall has no usable studs at all — glass, steel framing — ceiling mount hardware is a fallback, but note it's a different product line rated to 220 lbs, well below this kit.

Door width: Your door must be wider than the rough opening. For standard rooms plan for 2 in of wall overlap on each side — opening + 4 in. For bedrooms and bathrooms, 3 in per side gives better privacy — opening + 6 in. If wall space is tight, 1/2 in per side is the minimum functional overlap, but treat that as a floor rather than a target. See our measuring guide for full sizing formulas.

Door height: Measure the rough opening height and add 1 in minimum — the extra inch covers the top of the opening, and the hardware sets a 3/8 in gap at the floor. If there is casing or trim above the opening, the door needs to be at least as tall as the top of that casing so the track clears it entirely. Never mount the track to trim. Going taller raises the track, so recheck your ceiling clearance before ordering. With thick carpet, confirm the floor clearance holds along the full travel path.

Trim beside the opening: The kit includes spacers that set the track's baseline standoff for a flat wall, but clearing projecting casing or baseboard takes extra spacers — that's the trim clearance kit you select above. Measure how far your trim stands off the wall and match it: 1/2 in, 7/8 in, or 1-1/4 in. Projecting more than 1-1/4 in? Contact us before ordering — that's beyond every tier.

Origin: Colorado — made to order by Goldberg Brothers in Littleton

Lead time: 10-15 days

Track dimensions: 2 in wide × 3/16 in thick

Wheels: Color-matched steel by default, rated to the full 400 lbs · Delrin available as an upgrade for quieter operation, black only, and rated to 200 lbs per door

Weight capacity: 400 lbs per door with color-matched steel wheels · 200 lbs per door with the Delrin wheel upgrade · 600 lbs with a third roller, ordered through a custom quote

Door thickness: 1-3/8 in to 2-1/4 in

Hanger mount: Front face of door

Track lengths: 4 ft, 5 ft, 5 ft 4 in, 6 ft, 7 ft, 8 ft, 10 ft, 10 ft 8 in, 12 ft, 14 ft, 16 ft

Finishes: All 17 Goldberg Brothers colors

Configurations: Single door or biparting (two doors on one track)

Track centerline height: Door height + 1-3/4 in — confirm against your kit's instruction manual before drilling

Ceiling clearance required: 5-1/2 in above the top of the door

Trim clearance: Baseline spacers included · extra spacers to clear projecting trim available as an option above in 1/2 in, 7/8 in, and 1-1/4 in

Soft close: Available as an add-on, and can be retrofitted after install

Handles: Not included — order separately from our handles collection

Returns: The listed track lengths are stock sizes and return under the standard window — 25 days from delivery with pre-approval and a 25% restocking fee. Designer colors are custom orders and can't be returned, as is any track length outside the listed options. See our return policy

Warranty: Limited lifetime warranty against manufacturing defects. Hardware is sold as rustic-finished, so minor marks and patina are characteristic rather than defects. Wear items — felt pads, rubber bumpers, and the soft close mechanism — carry a one-year window.

For the full pre-order checklist, see our measuring guide.

• Steel track, 2 in × 3/16 in, in your selected length
• J-strap hanger sets with color-matched steel wheels, or Delrin if selected
• Wall mounting brackets, bolts, and spacers
• 2 track stops per hanger set
• 1 floor-mounted T-guide per door
• 2 anti-jump blocks per door
• Felt pads and rubber bumper bands — finish each track end as a quiet "stay" or a "bumper"
• Installation instructions

Fastener finish: clear zinc with Raw Steel, Silver Metallic, and PC Chrome; black oxide with Matte Black Texture, Bronze Texture, Black, and Arch Bronze; powder coated to match on the remaining ten colors — Jacob's Gold, Rustic Brown, Regal Red, Rocket White, Blue Ribbon, Flint Gray Texture, Dark Gray Texture, White Bronze Texture, Silver Vein, and Copper Vein. The J-strap is face-mounted, so the bolt heads sit on the door face and are visible once installed. Heavy duty is the only powder-coated tier where matched fasteners are offered at all — worth factoring into your finish choice.

Lag bolt length varies by kit and mounting setup — confirm the exact length in your kit's instruction manual rather than buying substitutes ahead of time.

Spacers are included for the track's baseline standoff on a flat wall. If casing or baseboard projects from the wall, you'll need extra spacers on top of those — that's the trim clearance kit in the options above. If you decide you need it after ordering, email us and we'll add it.

Tracks over 7 ft 6 in ship in multiple sections with connecting plates included. Your header board needs to span continuously across the joint.

If you have finished hardwood, tile, or LVP, you'll need a wall-mounted floor guide instead of the included floor-mounted guide.

Looking to add a decorative element? Goldberg Brothers accent trims are compatible with this hanger style — laser-cut steel silhouettes that mount directly to the strap bolts and swap on and off independently.

Heavy duty kits don't include handles or a latch, and clearing projecting trim takes an extra spacer set — plan for these before checkout:

• Trim clearance kit: Extra spacers for clearing casing or baseboard that projects from the wall — select the size above that matches your trim depth
• Handles: Bar pull or D-pull for the room-facing side — browse our handles collection
• Flush pull: For the wall-facing side if the door needs to be operated from both sides — browse our flush pulls collection
• Latch: Keeps the door closed deliberately — browse our latches collection
• Wall-mounted floor guide: If you have finished hardwood, tile, or LVP you can't drill into — browse our floor guides collection

The track must be at least 2× the door width for the door to fully clear the opening. Measure the door panel — not the rough opening.

• Single door: 2× door width — e.g. 36 in door → 72 in track
• Biparting (2 doors): 4× each door's width, which is the same as 2× the combined width — e.g. two 36 in doors → 144 in track

For biparting, size each door to (opening + 4 in) ÷ 2, then add both widths together and double the total. Worth knowing if you're deciding between one door and two: a biparting pair needs the same total track length a single door would need over the same opening.

The lengths listed in the options above are stock sizes. They ship as ordered and return under the standard 25-day window.

If the length you need isn't listed, request a custom quote. Goldberg Brothers cuts the track to your exact length at the factory and applies the powder coat after cutting, so there's no exposed steel, no field work, and the limited lifetime warranty stays intact — priced the same as the next standard size up. The one trade-off: a length cut to order is a custom order and can't be returned, so confirm your measurement before you submit it.

Goldberg Brothers rollers use sealed bearings that run dry. Do not lubricate the track or rollers. Silicone spray, WD-40, and white lithium grease all attract dust, build up in the channel, and make the door harder to roll, not easier. If a door starts to drag or squeak, the cause is almost always debris in the track or a level issue — wipe the track channel with a dry cloth and check that the hardware is still tight. A genuinely worn roller gets replaced, not lubricated.