The FourJay TB8 is a support tile bridge.
The FourJay TB8 Support Bridge has the dimensions 23-3/4" x 10-5/16". It is made of high impact material (or U.L. rated 94 V-O flame retardant material). When placed on 2' span of a 2' x 2' or 2' x 4' Tee-Bar suspended acoustical tile ceiling, the bridge can firmly support at least 4 times standard load, in accordance with EIA safety guidelines.
The bridge accepts a Fourjay Model PH8 series protective housing. It has the means to accept a speaker baffle, with loudspeaker mounted thereto, of either 9-1/8" or 11-1/4" diameter mounting circle.
Attachment provisions include mounted spring clip nuts, (4) #8-15 and pack of #8-32 J-Nuts to accept fasteners normally supplied with baffle kits.