Internal Wood Joist Mount Ceiling Plate

Ideal Use Cases

The Peerless-AV ACC120 Internal Wood Joist Ceiling Plate is designed for indoor mounting installations where the attachment point must be positioned between two wood ceiling joists above a finished ceiling. It is suited to projects that use joists spaced on either 16-inch or 20-inch centers. The adjustable, expandable design makes it useful when the required mounting location does not align directly with a single joist.

This mounting plate supports Peerless Jumbo Mount and Extension Column installations. Its threaded fitting also accepts most Peerless-AV Extension Columns, making the ACC120 appropriate for compatible suspended ceiling-mount assemblies that require an internal structural attachment.

Why Choose This Model

The ACC120 combines a 300 lb maximum load capacity with cold rolled steel construction. Its internal placement allows the mounting hardware to attach between ceiling joists above the finished surface. This configuration provides an adjustable attachment point while keeping the primary supporting structure within the ceiling space.

A key benefit is the ability to fine-tune the point of attachment before completing installation. The plate can be adjusted between the joists so the extension column and finished assembly align with the intended viewing position. This is particularly valuable when joist placement and the desired equipment position do not match.

Installation and Integration

The expandable plate attaches between two wood ceiling joists and accommodates joists installed on 16-inch or 20-inch centers. Assembly is required. Because the product is intended for installation above a finished ceiling, access to the joist space is necessary during setup.

The ACC120 includes a 1 1/2-11.5 NPS threaded fitting for connection to most Peerless-AV Extension Columns. It is also listed as compatible with the Peerless Jumbo Mount and Extension Column. Installers can adjust the plate before securing the assembly, allowing the threaded connection point to be positioned for the intended equipment location.

The unit is ceiling mountable and intended for indoor use with wood construction. Its black finish allows it to coordinate with compatible black mounting components where portions of the assembly remain visible below the ceiling.

Performance Highlights

• Maximum load capacity of 300 lb
• Expandable configuration for 16-inch or 20-inch joist centers
• Adjustable attachment point for installation alignment
• 1 1/2-11.5 NPS threaded fitting
• Cold rolled steel construction
• Black fused epoxy and powder-coated finish
• Approximate product weight of 8.50 lb
• Indoor, ceiling-mountable form factor

The adjustable and extendable mounting function is central to the design. Rather than limiting the finished assembly to a fixed point determined solely by joist position, the ACC120 provides room to refine the attachment location before installation is finalized.

What Makes It Different

The defining feature of the ACC120 is its between-joist installation. It is not simply a plate fixed beneath the ceiling surface; it mounts internally between structural wood joists above the finished ceiling. The expandable frame accommodates two common joist-center measurements, while the adjustable connection point helps establish the desired location for the extension column.

The combination of a 300 lb capacity, steel construction, and compatibility with Peerless mounting components supports integration into a coordinated mounting system. The product is manufactured in the United States, is TAA compliant, and is identified as compliant with the Restriction of Hazardous Substances requirements. RoHS and TAA are also listed among its certifications and standards.

Final Assessment

The Peerless-AV ACC120 is a purpose-built internal ceiling plate for compatible mounting assemblies installed between wood joists. Its expandable support spans joists on 16-inch or 20-inch centers, while its adjustable threaded attachment helps installers establish the intended final position before securing the system. With cold rolled steel construction, a 300 lb maximum load capacity, and a 1 1/2-11.5 NPS fitting, it provides a clearly defined solution for compatible Peerless-AV ceiling-mount applications.