Light Archon TrussLock Fan-Rated Ceiling Boxes and Brace Kits

Light Archon TrussLock ceiling boxes put a fan-rated mounting point exactly where the plan calls for one, with or without attic access. Brace kits drop through a 4 in. hole and span the joists; side-mount, pancake, and box-only formats cover direct-to-framing work.

The adjustable brace spans 16 to 24 in. joist spacing and its gripping teeth bite the framing as the bar tightens, so retrofit fans go in from below without opening the ceiling. Boxes take both 10-24 and 8-32 fixture threads per the published listing, and five knockouts with an included cable connector handle the wiring on the brace kits. Capacities run 5.9 to 21.5 cu. in. by format. The desk confirms format counts and fixture weights at quote review.

Highlights

• Fan-rated ceiling formats for paddle fans and heavy fixtures per the published listing
• Adjustable brace kits span 16 to 24 in. joist spacing without attic access
• 4 in. hole saw installation on brace kit retrofits per the published listing
• Accepts both 10-24 and 8-32 fixture threads
• Capacities from 5.9 to 21.5 cu. in. by format
• Five knockouts with included cable connector on brace kits
• Side-mount, pancake, and box-only formats for direct framing attachment
• Quote-first trade supply; format counts confirmed at quote review

Specification Table

Included Components

• Adjustable joist brace with mounting hardware on brace kit formats
• Cable connector and instructions on brace kit formats per the published listing
• Snap-on cover on the nonmetallic side-mount format

Installation Notes

• Cut brace kit openings with a 4 in. hole saw and set the brace teeth square on sound joists.
• Confirm the fan or fixture weight against the format rating at quote review before final selection.
• Count conductors, clamps, and devices toward box fill per NEC; the pancake format suits shallow fixture-only landings.
• Side-mount formats fasten to the joist face in open framing before drywall.
• Format counts and case quantities are confirmed at quote review.

Warranty and Support

• Backed by the Light Archon trade supply program; warranty terms are confirmed at quote review.
• Submittal sheets and takeoff review support are available from our electrical supply desk.

Frequently Asked Questions

Can these boxes hold a paddle fan?
Yes. The platform is the fan-rated ceiling line: brace kits and direct-mount formats are built for fan support, with per-format weight ceilings confirmed at quote review.

Do brace kits need attic access?
No. The brace drops through a 4 in. hole, spans 16 to 24 in. joist spacing, and tightens from below, which is the point of the retrofit design.

Which format for new construction?
The new work brace kit or a side-mount format nailed to the joist face before drywall. The pancake format covers shallow fixture landings under a joist.

What fixture screws do they take?
Both 10-24 and 8-32 threads per the published listing, so fan brackets and standard fixture crossbars land without adapters.

Documents

• Product Submittal Summary (PDF)
• Dimensional & Fit Reference (PDF)
• Installation & Warranty Reference (PDF)

Project pricing, lead time, freight routing, and final configuration are confirmed during quote review before order release.

Support and request quote workflows stay available throughout specification and order planning.