Twelve-door biparting bifold hardware uses two independent 6-door one-way assemblies — six panels on each side — that fold and stack to their respective walls when open, leaving the full opening clear. Each side is a 6-door one-way system producing a 15 in stack, split symmetrically from the center. Goldberg Brothers J top mount only — standard and heavy duty, all 17 finish colors, covering openings up to 284 in with standard duty or up to 572 in with heavy duty. For the full bifold buying guide, see our bifold hardware collection.
Goldberg Brothers
J Top Mount Heavy Duty Bifold Barn Door Hardware Kit | 12 Door Biparting
$1,417.00
How 12-door biparting bifold works
A 12-door biparting bifold uses two independent 6-panel assemblies — one on each side of the opening. Each assembly operates exactly like a 6-door one-way bifold: six panels arranged as three 2-panel assemblies in series, pivoting from a fixed bracket on their respective side and sliding along the shared track. When opened, each 6-panel assembly folds and stacks against its side wall — three 2-panel folds at 5 in each — producing a 15 in stack on each side.
When closed, the two assemblies meet at the center on the same plane. Alignment plates mount to the bottom of the doors where the assemblies meet, keeping them properly aligned at the center.
Each side requires approximately 15 in of clear wall space for its folded stack, plus clearance in front of the opening on both sides as the panels project outward while folding.
Sizing your 12-door biparting bifold
Track length equals total panel width — not 2× panel width as with standard sliding hardware.
| Coverage goal | Total panel width (all 12 panels) | Track length |
|---|---|---|
| Minimum coverage (2 in per pivot side) |
Opening + 4 in | = Total panel width |
| Fully clear (15 in stack per side) |
Opening + 30 in | = Total panel width |
Example for a 240 in opening (fully clear): Total panel width = 270 in · Track = 270 in · Each of 12 panels = 22.5 in wide
Maximum opening coverage: up to 572 in. For openings where all panels need to stack to one side, see our 6-door one-way collection. For sizing help, see our measuring guide.
Standard duty vs. heavy duty
Both tiers are Goldberg Brothers, made to order in Colorado in 10–15 business days. All 17 powder coat colors available in both tiers. Door panel weight and thickness determine the right tier.
| Goldberg Brothers standard duty | Goldberg Brothers heavy duty | |
|---|---|---|
| Capacity per panel | 62.5 lbs | 200 lbs |
| Total system capacity | 750 lbs | 2,400 lbs |
| Door thickness | 1-1/4 in to 1-3/8 in | 1-3/8 in to 2-1/4 in |
| Finishes | All 17 Goldberg Brothers powder coat colors | All 17 Goldberg Brothers powder coat colors |
| Hanger style | J top mount only | J top mount only |
| Bottom pivot | Wall-mounted both sides | Wall-mounted both sides |
| Max opening | Up to 284 in | Up to 572 in |
| Handles included | Yes — color-matched to finish | Yes — color-matched to finish |
Quick Ship is not available for 12-door biparting bifold configurations.
