Chief TRUSS SPANNING ADAPTER - CMA366
Chief TRUSS SPANNING ADAPTER - CMA366 is backordered and will ship as soon as it is back in stock.
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Product Overview
The Chief CMA366 truss spanning adapter mounts overhead AV equipment across truss systems for projectors, displays, and signage. It is built for auditoriums, broadcast studios, houses of worship, and exhibit booths where a structural truss is the available mounting point. The adapter spans two truss members and provides lateral shift to fine-tune fixture position. It accepts standard 1.5-inch NPT extension columns for a clean overhead drop.
Product Description

The CMA366 spans truss systems to enable overhead installation of equipment in permanent buildings and temporary exhibit environments. It bridges between truss members and provides lateral shift capability, so an installer can center a projector or display over the audience without relocating the truss. The adapter is compatible with 1.5-inch NPT extension columns, the standard interface across the Chief ceiling mount line, and routes cable through the column for a concealed run. Its span distance adjusts from 5 to 18 inches (127 to 457 mm) to fit a range of truss spacings. The integrated clamp accepts tubing up to 2 inches (51 mm) outside diameter or 1.9-inch (48 mm) square tubing. The CMA366 is TAA compliant for government and public-sector work. Pair it with extension columns and projector mounts from the full Chief collection at Creation Networks.
Key Features
- Truss spanning — Bridges truss systems for overhead equipment installation in buildings and exhibit booths.
- Lateral shift — Provides side-to-side adjustment to center the fixture over the space.
- NPT compatible — Accepts 1.5-inch NPT extension columns used across the Chief ceiling mount line.
- Concealed cabling — Allows cable routing through the column for a clean overhead run.
- Adjustable span — Span distance of 5 to 18 inches (127 to 457 mm) fits varied truss spacing.
- Clamp range — Accepts up to 2-inch (51 mm) OD or 1.9-inch (48 mm) square tubing.
- TAA compliant — Meets TAA requirements for government procurement.
Technical Specifications
| Manufacturer | Chief (Legrand AV) |
| Model / SKU | CMA366 |
| Type | Truss spanning adapter |
| Span Distance | 5–18 in (127–457 mm) |
| Clamp Range | Up to 2 in (51 mm) OD or 1.9 in (48 mm) square tubing |
| Column Compatibility | 1.5 in NPT extension columns |
| Lateral Shift | Yes |
| Cable Routing | Through column |
| TAA Compliant | Yes |
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
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