Document rx960Bp0G0NayyYnDXrQKe1JG

\c\i< PLAINTIFF'S EXHIBrr X ACOUSTISORBER Space Units... simple, low-cost, suspended sound absorbers that arrest plant noise build-up n * d High industrial noise levels are a problem largely due to the build-up of reverberant sound energy resulting from a lack of adequate sound-absorptive surfaces. Newly developed to meet this widespread need are Acoustisorber Space Units. Metal framed and plastic film-encased, these mineral fiber pads are sus pended overhead to effectively control such noise. Each unit, I-in. thick and measuring 20"x24", is simply installed on prehung parallel wires in a spacing pattern determined from the calculated noise reduction. Since Acoustisorber Space Units absorb sound on both sides, their Sound Absorption Coefficient is an exceptional 1.5 sabins per sq. ft. of unit, compared with .04 for steel roof deck, .07 for painted concrete block walls or wood floors, and .02 for concrete floors (values at 1000 Hz). As a bonus, the high reflectivity of the white PVC plastic film helps to boost brightness levels in dimlylit areas. The spacing pattern should be as balanced as possible, but is not critical and an irregular pattern does not compromise the units' efficiency. Overhead fixtures and utilities need not be moved, for Acoustisorber Units can be hung around them. Fire Resistance--Acoustisorber Space Units are noncombusti ble. Fire hazard classification (ASTM E84 test procedure): flame spread 0, fuel contributed 15, smoke developed . Sound Rating--As tested by Riverbank Acoustical Laboratories (test no. A-72-90) Acoustisorber Space Units 1 ft. apart in rows 3 ft. o.c. showed sound absorption characteristics as follows: ( frequency (Hz) 125 250 500 1000 2000 4000 absorption (sabins 0.7 1.7 3.2 5.0 5.3 3.9 per 20''x24" unit) For complete data on absorption and procedures for calculating the number of units required, see U.S.G. Folder SC-811. Limitations--Acoustisorber Units (1) reduce only reverberant sound energy; sound direct from source to listener is unaffected; (2) are effective as sole treatment only for sound level reductions of approximately 7 db or less, thus are recommended for reduc tions greater than 7 db only in combination with other forms of acoustical treatment, most effectively at the source; (3) must be located to not interfere with fire-protection sprinkler operation; (4) are not recommended for use in areas where temperatures exceed 150F. Easily-installed ACOUSTISORBER Space Units help keep irritating, damaging noise levels down, personnel comfort and morale up. Non-Acoustical Ceiling Materials... for specialized applications USG Asbestos Board, 316" thick in nom. 24"x24' and 24"x48" sizes, is supplied either Perforated or Unperforated, for lay-in use in ceiling grid systems. Square-edged or beveled (lie" bevel on all four sides). Perforations, .197" dia., are spaced " o.c. White Rippletone texture finish. For other data, see table on page 4. Other tile bases, where a noncombustible base for adhesive ap plication of ceiling tile is required, include Sheetrock and Sheetrock Firecode gypsum panels, and Rocklath plaster base. See U.S.G. Folders SA-917, SA-927. THERMAFIBER Light Fixture Protection brings packaged con venience to jobs using U.S.G. ceiling systems, whether panel or tile. This consists of 1V4" thick semi-rigid mineral wool board wire-tied and suspended over fixtures. The assemblies (illustrated below) carry UL Labels covering board module ceiling designs of 1, l'/i, 2, 3 and 4 hours for which ratings have been established. They are adaptable to acoustical tile and panel ceiling constructions using either an exposed grid or concealed Z-spline suspension. The Thermafiber package is shipped in one module for acous tical ceiling panels, and in three where tile is used. IINITPp STATFP gypsum V* ' IUndam<Nrforatd PtKfATWK DUmmI Parferglad ^ \H/ vand panel ceiling constructions using either an exposed grW concealed Z-eptine ntpoelon. . The ThniunM package U shipped in modules for tr construooons using acoustical ceding board, and one when tile is used. . . ; .9 USG Calling Boards > Bejrul* Ftriauttd PERFATONE ViiMrtoratttf. PWATOHE --dsidipUsiT , ... Three ceiling board products arc available from U.S.G. k- specialised applications. . , . . -: > --SMVUmtOCK* Ceiling Board,non<Rooustical,fortay-inpj'v ' v ~ k use In ceiling grid systems. Available in nom. 24*x24' tsl Crl,- - , } ' T-, 24*x4fi* sizes, special sag-rcsistani gypsum core with eithr *\ " ' '.V (a) unpainted plain manila face paper, or (b) paintr.' V - ; white. Three thicknesses svsilaWc: Vi*, Vi*, H*. ; As_b_e_s_tp_ * "Board, _y.*"lhkcV nom. as border tile or for decorative effects. For other character-; istks, see table on page 2,-~ -;.. ...... .'. 24*x48' sizes, ss up_plied other Perforated or Unpcrforett for lay-in use in ceiling grid systems. Square-edged -r beveled (14* bevel on all four sides). Perforations, O.IV*r function .- . ... .... dia,, are spaced VV* n r Whitft ftipplr.tonr texture Fire Pretetden--Use of Fire-ruled Pwatcjne systems etlmi- nates need for contact fireproofing and/or iiMcrmxlial* ceiling hie barriers in many installations; Conventional Pxrfatowe system rated Incombustible by AMA. Sound Ratings--Excellent absorption and attenuation; sec tables, pages 4 and 5* ' Maintenance--Provides quick access to any plenum area; easily maintained and highly washublc. . Decoration--Has 72% light reHcctanoe in while; cait be painted in decorator colon with higfvgrad* metallic paint without impairing acoustical properties, if care is taken not to fill perforations, , ' IlmHations . In areas of high humidity or where moisture might Impinge against the acoustical surface. Aluminum PsRrxmNt Acousti cal Units with galvanized fittings should be used, or a different architectural (Resign should be considered. Ratings, erection and specification of the PwtEatone system are covered in USG Folder b-1575. ' PERFATONK. Accessorise, in addition to pans and mineral fiber pads, include more than SO elements which make up the various systems available--broadest in the industry. A single specification assures the use of parts medd to fit and function together--toe runners. - wire grids, straps, dips, damps, spooera. wall moulding, angles, chaitock, grid pad supports. Thcrmaho^r Ralad light Fixture Prataction brings packaged convenience to jobs using USG ceiling systems, whether panel or tile. This consists of i Id' thick semi-rigid mineral wool board wire-tied and suspended over futures. The assembly (illustrated, below) carries UIL Labels covering hoard module ceiling designs of 1.1 Vi, 2 and .1 hours for which ratings have been established. It is adaptable to acoustical lile '^MoeriT* special type V4**2'*R' gypsum where an incomburtible base for adhesive application . ceiling tile Is required. Nailed to wood members; allcrux bases for same application are Baxhord* and Rav: Ftnscooa gypsum backing board, Shbetrock and Shu* rock Ftaecooe gypsum wallboard, Rocklath* plaster has Screwed or nailed to metal channels: alternate baic* !.< same application are Baxhoro and Baxboro Fitun* gypsum hacking board, Shmctrock Fwecuoe wallboard. For other characteristics, see tabic on Page 2. 6. USG Matat Accoaaoriog for CoHings description Untied State* Gypsum markets precision-made mcul asm soriea which contribute to assured performance when r three Z-spline suspension systems arc specified: --Conoco lad Z-Spfinc --Concealed Accessible --Exposed Z-Spline . U.S.G. also supplies complete accessories for four >r systems, described ia preceding sections of this c<s*ks Those are the Airson* Air Distribution System, kit- ft* Exposed Grid System. Perfatons Metal Pan Syutm. % Aurauut* Lightmg-Acoustical System. Ratings, erectur ur specification of all seven swcmblic* are covered in prr..-v-i USG Systems Folders. For the three spline xystemv. nr* accessories are supplied in five group* as follows: Basic Grid Parts--I Vi' and V4' 16 ga. cold rolled chn-r* 16' and 20' lengths; etcctro-gslv. spring spacers. IK p rA clips, 10 and 11 go. galv. dips. 16' and 2O' lengths; dcctro-galv. spring spacer, lx fu clips, 10 and 11 ga. galv. clips. THEMAfltOP IwgUHoa Light FUiars Piotsctton Caaceakd 7rSpllne Parts (all 26 g*.)-V4* and I %' 7*ft w lO' lengths, and spUocs; fiat splines; I finish channrh * lengths, and splices; No. 00 dip*, corner plates. trw-Aw lacquer. with upmd grid witk cancMtcd 7-iptm* suspension F.x posed ZrSptbw Parts--26-ga. I V4* 7.-splincs. 10 r-r:* and splices; lee and angle splines. Concealed Accessible Part*--Angle splines, 2.1 and "** lengths. 12**12' Access Tile Parts--Split angles (R nr ' *. v L-splines. - iCS035 0250 J t