Document mBeQzOo3E6yrzLdZoVm2L0v70

A.I.A. File . 21-A TECHNICAL INFORMATION PLAINTIFF'S EXHIBIT Asters U UNITED STATES GYPSUM 1961 * TATI I OTMUH' > 1381 COOdj USG GYPSUM PLASTERS LI ACOUSTICAL FINISHES Acoustics) finishes, either hand or machine applied, provide a choice of pieasing surface appearances in addition to sound absorptive properties. However, they do not have Ihe charac teristics of other finishes with respect to hardness, impact and abrasion resistance, or ease of maintenance. (For further de tails, see AlA File 39-B). HI-LITE Acoustical Platter Hi-Lite Acoustical Plaster provides high light reflection, relatively high moisture resistance and a harder finished surfuce than moat other acoustical plasters. AUDICOTE Acoustical Plaster AUDICOTE Acoustical Plaster provides a low coat acoustical treatment which car. Pe machine or hund applied, over a variety of surfaces. Limitations of Use (Acoustical Finishes) 1. Acoustical plasters are not recommended over radiant heat ing installations. 2. Acoustical plasters are not designed for use on areas sub ject lu impact or abrasion. ACOUSTICAL PLASTERS fS.. AlA File 39-B) mi-UTE Actiicai piasisr--for an acoustical finish where high light reflection, hardness, or resistance to dampness are re quired. It niuy be bund applied over properly prepared Port land cement, lime or gy|isum basecoats. Finish is either stippled or sUpple-perforuted. Light reflectance is 0% when stippled. AUDICOTE Acsuiiicei piasters -- for an economical acoustical finish. May be applied by machine or by hand over properly prepared gypsum or Portland cement lime basecoala, or over monolithic concrete. Finish is normully a machine texture, but ninny utiier finishes ure possible. It is available in either Satin While or Special White. UNITED STATES GYPSUM NJ 7 BB007 0 U 2 1 USG GYPSUM PLASTERS C. c. Where RED TOP AUDICOTE Acoustical Plaster is indicated for application direct to smooth monolithic concrete, reinforcing bar chair legs shall be either galvanized or coated with rust inhibilive paint and use of nails or other raw steel against forms or surface of concrete held to a minimum. Where metal is exposed in spite of these precautions, and where AUDICOTE is to be applied directly against corner beads or other metal accessories, the metal should be treated with one coat of aluminum paint. d. (Optional Inclusion) See AIA File 39-B, page 4, for optional inclusions where AUDICOTE iB to be ap plied over poured monolithic concrete or over pre-cast structural concrete units. g. (HI-LITE) (AUDICOTE) Acoustical Plaster, as manufactured by the United States Gypsum Company. E d O l EOrtdO TJ*. S.g. UJ. Pot. os. UNITED STATES GYPSUM 13 4> USG GYPSUM PLASTERS iLA% ( ^* XIII. APPLICATION OF FINISH COATS. (This section does not apply to Acoustical Plasters. See AIA Kile 3D-B). The nniah coat ahull be applied over a partiully dry, level and cross-raked gypsum basecoat. The finish coat shall be scratched in thoroughly and immediately doubled back to fill out to a true, even surface. Thickness shall be no more than pj'. a. Trowel finishes shall be water trowelled during and after set to provide a smooth, dense surface for decoration, free of irregularities and blemishes. b. Float finishes shall be floated with shingle, wood, carpet or rubber flout to bring aggregate to the surface and produce a finish free of slick spots, cat faces, and other blemishes. In natural color finishes, water shall be used sparingly while floating. Water shall not be used while floating colored finishes. c. Textures shall be applied in such a manner that they will match the sample approved by the architect. d. Machine applied sprav finishes shall be applied over a smoothly trowelled level surface, in such a manner that they will match the sample approved by the architect. " tnJH l COOdS -------C:\ UNITED STATES OYPSUM 15 o I-- O'