J Top Mount Heavy Duty Bifold Barn Door Hardware Kit | 2 Door Kit

Panel weight: Up to 200 lbs per panel · 400 lbs total system. For panels under 100 lbs, Delrin wheel upgrade is available (black finish only) for quieter operation.

Panel width: Sized based on how much coverage you need over the opening — see the panel sizing section below for formulas and worked examples.

Panel height: Opening height + 1 in. Leaves 5/8 to 1-1/4 in of floor clearance, adjustable at the wall-mounted pivot during installation.

Panel thickness: 1-3/8 in to 2-1/4 in. For thinner panels (1-1/4 to 1-3/8 in), standard duty hardware is the right choice.

Maximum panel size: 48 in wide × 108 in tall per panel.

Ceiling clearance above door: 6-1/2 in required between the top of the door panels and the ceiling.

Wall clearance on stack side: For a fully clear opening, 5 in of clear wall is needed on the stack side — heavy duty hardware folds two panels into just 5 in of depth. Minimum 1/2 in between the track end and any hard obstruction on the pivot side.

Wall header: A solid header above the opening is required for track mounting. If there is no existing header or backing in the wall, we recommend installing a minimum 1×6 hardwood board (3/4 in thick × 5-1/2 in wide) that extends past the length of the track to the next stud or structural support point on each side. Ceiling mount is not compatible with bifold hardware.

Brand: Goldberg Brothers — made to order in Colorado, USA

Lead time: 10–15 business days

Finishes available: All 17 Goldberg Brothers powder coat finishes

Weight capacity: 200 lbs per panel · 400 lbs total system

Panel thickness: 1-3/8 in to 2-1/4 in

Maximum panel size: 48 in wide × 108 in tall

Ceiling clearance: 6-1/2 in above door panels

Floor gap: 5/8 to 1-1/4 in — adjustable at the pivot during installation

Pivot type: Wall-mounted sidewall bracket and plate (included)

Pull handle: 7 in pull handle included

Wheels: Steel (standard) · Delrin upgrade available for panels under 100 lbs, black finish only

Soft close: Not available for bifold hardware

Ceiling mount: Not compatible with bifold hardware

Warranty: Limited lifetime warranty

For bifold-specific sizing formulas see our bifold measuring guide. For general pre-order measurements see our measuring guide.

• Pre-punched track (1) — custom cut to your specified length
• Fixed J top mount hanger (1) · Loose J top mount hanger (1) — both attach to the top edge of the door panel via wood screws
• Anchors (4) and screws (4) for top-edge hanger attachment
• Hex bolts (2) · 3/8 in spacer (1) · flange nuts (2) for roller assembly
• Hinges (4 — 3 used for panels 7 ft tall or under, all 4 for taller panels) · 1 in hinge screws (24)
• Sidewall pivot bracket and plate (1 set) — wall-mounted heavy duty pivot assembly
• Door bottom plate (1) · pivot pin (1) · 5/16 in lock washer (1) · 5/16 in nut (1)
• Track stops (2) · rubber bumper band (1) · felt strip (1)
• 5 in hex lag bolts (5) · 1/2 in spacers (10) · 1-1/4 in spacers (5) · fender washers (5)
• 1-5/8 in wood screws (5)
• Wrench (1)
• 7 in pull handle (1)

The fixed hanger attaches to the top edge of the pivot-side panel. The loose hanger attaches to the top edge of the non-pivot panel and travels freely along the track as the doors fold open. No hardware mounts to either door face.

A latch and flush pull are not included — add them before ordering to avoid a second shipment. Soft close is not compatible with bifold hardware.

This kit includes a 7 in pull handle. A latch and flush pull are not included:

Latch: Keeps the door closed deliberately — browse our latches collection

Flush pull: For the wall-facing side if the door is operated from both sides — browse our flush pulls collection

Delrin wheel upgrade: For panels under 100 lbs — quieter than the standard steel wheels. Available in black finish only.

Bifold sizing is based on total panel width — the combined width of both door panels — not the rough opening. The track length you select should equal your total panel width. For a full walkthrough see our bifold measuring guide.

Minimum coverage (doors close over the opening with a small overlap on each side):
Total panel width = opening + 3 in · Each panel = (opening + 3 in) ÷ 2
Example: 60 in opening → total = 63 in → each panel = 31.5 in, round up to 32 in

Fully clear — asymmetrical (doors stack fully clear but overlap more on the pivot side):
Total panel width = opening + 6 in · Each panel = (opening + 6 in) ÷ 2
Example: 60 in opening → total = 66 in → each panel = 33 in

Fully clear — symmetrical (recommended) (equal overlap on both sides):
Total panel width = opening + 10 in · Each panel = (opening + 10 in) ÷ 2
Example: 60 in opening → total = 70 in → each panel = 35 in

Goldberg Brothers tracks are custom-cut to your specified length. If the size you need isn't listed, email us at info@thebarndoorhardwarestore.com — custom lengths are priced the same as the next standard size.