Product Description

4" dia. round fan support box for use with nonmetallic sheathed cable

Catalog #: SB-CBFR

Width: 4 in.
Depth: 2-3/4 in.
Volume: 25 cu. in.

Type of Installation: Old or New Work

Round Ceiling Box

Carton Quantity: 12
Carton Weight: 10 lb.

UPC: 085339945062
UNSPSC: 39121316
U.S. Patent No. 7,855,338

U.S. Patent No. 6,365,831 B1
Country of Origin: United States of America


Machine tapped fixture holes and bolts/nuts for fan mounting, adjustable mounting plate for additional substrate thickness


New and old work residential construction 2 HR fire resistive floors and ceilings (70 lbs. fan support and 90 lbs. fixture support)


ANSI / UL 514C: File No. E30594


Ul Code Black


Fire Classification

Fire Test of Building Construction Materials
ANSI / UL 263: File No. CEYY.R9379 (Category / File No.) 

Note: Products must also be certified to: ANSI / UL 514C


Fire Resistance Classification in Floor-Ceiling Assemblies 2-Hours or Less
Distance between boxes in adjacent cavities may be reduced to 5 ½ inches

Note: For more details please refer to the UL fire resistive directory and Allied Moulded’s CEYY.9379 (Outlet boxes and fittings classified for fire resistance)






Internal screws with adjustable slider plate for substrates 1/2" to 1 5/32"

Additional Materials

Galvanized steel brackets and plated carbon steel fasteners

Carbon steel fasteners

Plated carbon steel fasteners

Support Rating

90 lbs fixture support and 70 lbs fan support