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,�,�.,.,. . _ _ <br /> 2.02 ACOU3TICAL LAY•IN BOARD3 <br /> _ �3 �, p�d AcapUcal Lay-In Bo�rds(AG�:Armatrong'Minaboard Cortege#�823'. No <br /> eubtdhdlont. Board ehall me�t ths follovvinp: <br /> 1. Slzs: 24'x 49'x S/8'thidc; aquaro edpe. <br /> 2. sTc: 35 to 39(conunuous cefling>. <br /> 3. NRC: .5S to.BS. �!-.� <br /> 4. LIpM R�1Nctlon: OJ5 minlmum. �/f � <br /> � � <br /> ;; 5. FlartN Spread: UL IabN wh�n tNt�d pe ASTM E119. Q �"`� ��(7 L <br /> � <br /> j A. Finbh: M�nufacturer'a ttandard whfts PaiM flnish. ; <br /> 7 _ <br /> B. NarR�ud Aoowtica_l`La_yyIn Bo��(A�Gt/)y:�fumstronG'Mlnaboard Corte9a 747' No � <br /> �/� �M1a�����wv��ry� f <br /> d <br /> 1. Sizr 24'x 48'x 5/6'thk:k;�q�w�ed9e• " <br /> ; <br /> ; � <br /> :�� 2. 3TC: 40 to 44(contlnuous ceiliny). ;� <br /> � 3. NRC: .60 to.80. ';' <br /> � <br /> �, UpM ReAecdon: 0.75 minimum. � <br /> 5. Flam�Spreed: Claaa 25 whsn testsd per ASTM EB4. . <br /> - 8. Flnish: Manufacturor'�standard whits punt fln(sh. <br /> -- � <br /> , <br /> 2.03 METAL SUSPENSION SYSTEM3 '+ <br /> A. Non-Ret�d E�cpo�d(irid Suspension Syetem (AG1): Donn Corpwallon'DX-28 Main - <br /> qunnK and DX�424 and DX•218 Cross Tess',or approved doubb w�b swpsnfbn <br /> ey�t�m barfnq•H�avyDuty'etructural das�fflcatlon a per A3TM C835. , <br /> - t, 8uspenelon syatem ahell bs tumlahed complete with ell acceaeory Itema indicated or <br /> hqulred to complete InatallaUon. <br /> 2. Main runnen and cross ba and their eplic�s and IMersectlon connectoro shell be ;. <br /> daiqnsd and consuucled ro carry a mean uttimats teet load of not lets then 1e0 <br /> pounds or twica ths actual loed,wh�chsver b 9reater. Connection at eplkxs and <br /> InteroecUons ahall be mechanical interlockin9 type• <br /> 3 fln'Ishs�Ex�poeed totvlew poNona shall heceive low g oas whks bakedon eUne msltl <br /> -- �� B. RaUd Exposed Cirid Suepsnabn Syst�m(AG21: Donn Corporatlon'DXL-28 Mein <br /> Runner and DXL-424 and DXL•218 Croa Teee',or approved doubl's web swpenslon <br /> �, ayalsm bsar�ng'HeavyDuty'atruatural dnesl�cation as per ASTM C835.All comPonents <br /> � ths acouaUcal conve�ctori or provide a suepenae oin s�etem�which has been tested end�t <br /> � <br /> � — qenovetiona to <br /> +; pualNy Control Laboratory <br /> ;, — Boeing•Everett-Bldg.40�03 <br /> ose�o•s e�so3.o� <br />