BB-6 Commercial Bottom Brackets – 2" & 3" Track – 11 Gauge – Pair

The BB-6 Commercial Bottom Bracket Set is a heavy-duty bottom fixture designed for commercial and industrial sectional garage doors using 2-inch or 3-inch track.

Constructed from 11-gauge steel, the BB-6 mounts at the lower corners of the door and provides the primary attachment point for the lift cables while supporting the bottom roller assembly.

The brackets use a drilled-pin configuration and are supplied as a left- and right-side pair.

Specifications

Key Features

• Heavy-duty 11-gauge steel construction

• Compatible with 2-inch and 3-inch track systems

• Designed for commercial sectional garage doors

• Drilled-pin bottom fixture design

• Provides a secure attachment point for garage door lift cables

• Supports the bottom roller assembly

• Supplied as a left- and right-side pair

• Suitable for replacement, repair, or new commercial door installations

What the Bottom Bracket Does

The BB-6 mounts to the bottom corners of a sectional garage door and connects the door to the lift cables and counterbalance system.

As the torsion spring system operates, the cables transfer lifting force to the bottom brackets, allowing the door to raise and lower. The bracket also positions the bottom roller inside the vertical track.

Because this hardware carries significant load, proper bracket selection and installation are important for safe and reliable door operation.

Common Applications

• Commercial sectional garage doors

• Industrial overhead doors

• Warehouse doors

• Automotive service doors

• Loading and service facilities

• Replacement of damaged or worn commercial bottom fixtures

• New commercial sectional door hardware installations

Compatibility & Fitment

This BB-6 is designed for sectional doors using 2" or 3" track.

Before ordering, verify:

• Track size

• Existing bracket dimensions

• Mounting-hole pattern

• Drilled-pin configuration

• Lift cable attachment method

• Roller stem and roller position

• Required flange dimensions

Commercial bottom brackets can look similar while having different dimensions and cable attachment configurations. Compare the existing hardware carefully before ordering.

Installation & Safety

Garage door bottom brackets are attached directly to lift cables that can be under extreme tension from the counterbalance system.

Never loosen, remove, or adjust a bottom bracket while the lift cable or spring system remains under tension.

Improper removal can result in sudden cable movement or uncontrolled release of stored spring energy. Installation and replacement should be performed by a qualified garage door technician familiar with commercial sectional door systems.

BB-6 Commercial Bottom Brackets for 2" & 3" Track – 11 Gauge Pair

Heavy-duty BB-6 commercial garage door bottom bracket pair for 2-inch and 3-inch track. 11-gauge steel construction with drilled-pin design for commercial and industrial sectional doors.