81-8S TILE BRIDGES 81-4 FOR 4 AND 8 LOUDSPEAKERS 81-8R FEATURES Locating Tabs Secure the Enclosure to Tile Bridge 81-8S for Easy In-Ceiling Installation of Speakers and Grilles Load-Bearing Bridges Eliminate Ceiling Tile Sag by Distributing Assembly Weight to Ceilings Support System Choice of Three Models that Accept a Wide Variety of Baffles and Baffle-Enclosure Combinations Rust-Resistant 24-Gauge Electrogalvanized Steel Construction Ensures Long Service Life APPLICATIONS Utilize Atlas Sound 81 Series tile bridges to prevent ceiling tile sag in suspended ceiling installations of loudspeaker assemblies. A The 81-8S and 81-8R (accepting 8 loudspeakers) and the 81-4 B (designed for 4 loudspeakers) distribute the assembly weight to overhead T-Bar support members. C GENERAL DESCRIPTION 81-8S The 81 Series includes three models and can accommodate over 30 Atlas Sound baffles. The 81-8S is designed to mount 8 loudspeakers and has a square cut-out with a multi-position hole pattern to accom- modate an extensive variety of round and square baffles including tor- sion spring and screw mount models. (See chart below for specific baffle model numbers.) Adaptability of the 81-8S also makes it ideal as a stocking item. Model 81-4 features a round cut-out and accepts 4 loudspeaker baffle Models 51-4 and 60-4. Model 81-8R, like the 81-8S, handles 8 loudspeakers but features a round cut-out that suits baffles mounting the industry standard Atlas Sound 95 Series enclo- sures. All tile bridges are constructed of 24-gauge CRS with an elec- trogalvanized rust-resistant finish. DIMENSIONS MODEL A B C WEIGHT 1 5 81-8S 8 (203mm) 14 8 23 8 2.0 lbs.(.9 kg.) 3 81-4 5 16 (132mm) (359mm) (600mm) 2.6 lbs.(1.2 kg.) 3 81-8R 10 4 (273mm) 2.0 lbs.(.9 kg.) 81-4 MOUNTS BAFFLE MODELS 81-8S 51-8, T51-8, 60-8(W), T60-8(W), 61-8W, T61-8W, (T)62-8, 63-8, 67-8(W), 68-8W, 161-8, T161-8, 164-8, T164-8, 169-8, 170-8, M222(W), TM222W, T620-8 T610-8W, T710-8, T720-8A, P900, P910, P912 81-4 51-4, 60-4 (Grilles Only) 81-8R 51-8, 60-8(W), 61-8W, 62-8, 63-8, 67-8(W), 68-8W, 170-8, M222(W), P900 ARCHITECT AND ENGINEER SPECIFICATIONS The items described are installation accessories, and their use is determined by the baffle, enclosure, or loudspeaker package series selected. Refer to the Architect and engineer Specifications outlined on each component specification sheet. 81-8R Specifications subject to change without notice 1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. / TELEPHONE: (800) 876-3333 / FAX (800) 765-3435 257 2001 Atlas Sound LP Printed in U.S.A. 000501 PN 338810 SL3-1431 THREEINSTALLATION Easy installation of the 81 Series is accomplished by: Additional information: Install mounting screws through grille mounting holes into tile bridge 1. Cutting a hole in the ceiling tile and placing a tile bridge over the hole from above. The top of the enclosure (not the rim) or enclosure may be used as a pattern for proper hole dimension. J-Nuts can be relocated to accommodate specific backbox or 2. Mount the enclosure from above. grille models 3. Mount the loudspeaker/baffle assembly through the ceiling tile Adjustments may need to be made when installing a torsion spring and tile bridge to the enclosure. (See illustrations below.) For grille, T-bar, and an enclosure.See Special Application below applications where enclosures are not required, installation is the sameexcept loudspeaker and baffle mount to tile bridge Floor-side backbox installation is possible with Model 81-8R only using J-Nuts. TYPICAL ASSEMBLY OF 81-8S TILE BRIDGE NEW Use enclosure tabs for tempo- rary positioning of enclosures Mounting the tile bridge with flanges facing up offers the the most strength. during pre-installation. Enclosure (optional) 1. Locate and bend up the two positioning tabs. To prevent metal-to-metal 81-8S rattle, install four HX76 felt TILE tabs (order separately). BRIDGE 2. Place the enclosure on top of the tabs Square Cut-Out 3. Bend tabs down to (with multi-position hole temporarily hold pattern to accept various enclosure. Speaker enclosures). mounting holes on enclosure and bridge Loudspeaker should be in alignment and Ceiling Tile (5/8 min. thickness ready for future when using torsion slots) Baffle loudspeaker/ baffle mounting. Special Application for 81-8S: When a torsion spring grille, tile will need to be secured to the tile bridge via four 8-32 screws (not bridge, and enclosure are specified, the grille will mount to the tile included). In some cases, the enclosure may need to be rotated bridge only and not to the enclosures torsion tabs. The enclosure to avoid the torsion tabs and insure a proper fit. TYPICAL ASSEMBLY OF 81-8R TILE BRIDGE 1 Mounting holes are 11 4 (286mm) Enclosure (optional) center to center (4 are tapped holes, 4 are clearance holes). 81-8R Tile Bridge Round Loudspeaker Ceiling Tile Clearance Hole 1 (Cut 11 2 (292mm) hole in ceiling tile for 95 Series and other typical enclosures.) Note: Floor-side installation is possible Loudspeaker by pushing enclosure through clearance hole and securing lip of enclosure to Baffle ceiling tile and tile bridge. Note: The 81-8R does not include slots for mounting torsion spring grilles. Specifications subject to change without notice 1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. / TELEPHONE: (800) 876-3333 / FAX (800) 765-3435 2001 Atlas Sound LP Printed in U.S.A. 00501 SL3-1431