09 51 00.pdf

Ti nker AFB, OK TAFB Techni cal Spr ci f i cat i ons 2019

SECTI ON 09 51 00

ACOUSTI CAL CEI LI NGS

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o wi t hi n t he t ext by t he basi c desi gnat i on onl y.

ASTM I NTERNATI ONAL ( ASTM)

ASTM A1008/ A1008M ( 2015) St andar d Speci f i cat i on f or St eel , Sheet , Col d- Rol l ed, Car bon, St r uct ur al , Hi gh- St r engt h Low- Al l oy and Hi gh- St r engt h Low- Al l oy wi t h I mpr oved For mabi l i t y , Sol ut i on Har dened, and Bake Har dened

ASTM A167 ( 2011) St andar d Speci f i cat i on f or St ai nl ess and Heat - Resi st i ng Chr omi um- Ni ckel St eel Pl at e, Sheet , and Strip

ASTM A489 ( 2012) St andar d Speci f i cat i on f or Car bon St eel Li f t i ng Eyes

ASTM A580/ A580M ( 2015) St andar d Speci f i cat i on f or St ai nl ess St eel Wi r e

ASTM A641/ A641M ( 2009a; R 2014) St andar d Speci f i cat i on f or Zi nc- Coat ed ( Gal vani zed) Car bon St eel Wi r e

ASTM A653/ A653M ( 2015; E 2016) St andar d Speci f i cat i on f or St eel Sheet , Zi nc- Coat ed ( Gal vani zed) or Zi nc- I r on Al l oy- Coat ed ( Gal vanneal ed) by t he Hot - Di p Pr ocess

ASTM B633 ( 2015) St andar d Speci f i cat i on f or El ect r odeposi t ed Coat i ngs of Zi nc on I r on and St eel

ASTM C423 ( 2009a) Sound Absor pt i on and Sound Absor pt i on Coef f i c i ent s by t he Rever ber at i on Room Met hod

ASTM C635/ C635M ( 2013a) Manuf act ur e, Per f or mance, and Test i ng of Met al Suspensi on Syst ems f or Acoust i cal Ti l e and Lay- I n Panel Cei l i ngs

ASTM C636/ C636M ( 2013) St andar d Pr act i ce f or I nst al l at i on of Met al Cei l i ng Suspensi on Syst ems f or Acoust i cal Ti l e and Lay- I n Panel s

ASTM C834 ( 2014) Lat ex Seal ant s

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ASTM E119 ( 2016) St andar d Test Met hods f or Fi r e Test s of Bui l di ng Const r uct i on and Materials

ASTM E1264 ( 2014) Acoust i cal Cei l i ng Pr oduct s

ASTM E1414/ E1414M ( 2011a; E 2014) Ai r bor ne Sound At t enuat i on Bet ween Rooms Shar i ng a Common Cei l i ng Plenum

ASTM E1477 ( 1998a; R 2013) Lumi nous Ref l ect ance Fact or of Acoust i cal Mat er i al s by Use of I nt egr at i ng- Spher e Ref l ect omet er s

ASTM E580/ E580M ( 2014) St andar d Pr act i ce f or I nst al l at i on of Cei l i ng Suspensi on Syst ems f or Acoust i cal Ti l e and Lay- i n Panel s i n Ar eas Subj ect t o Ear t hquake Gr ound Mot i ons

ASTM E795 ( 2005; R 2012) Mount i ng Test Speci mens Dur i ng Sound Absor pt i on Test s

ASTM E84 ( 2015b) St andar d Test Met hod f or Sur f ace Bur ni ng Char act er i st i cs of Bui l di ng Materials

SCI ENTI FI C CERTI FI CATI ON SYSTEMS ( SCS)

SCS SCS Gl obal Ser vi ces ( SCS) I ndoor Advant age

U. S. DEPARTMENT OF DEFENSE ( DOD)

UFC 3- 310- 04 ( 2013) Sei smi c Desi gn f or Bui l di ngs

UL ENVI RONMENT ( ULE)

ULE Gr eenguar d UL Gr eenguar d Cer t i f i cat i on Pr ogr am

UNDERWRI TERS LABORATORI ES ( UL)

UL Fi r e Resi st ance ( 2014) Fi r e Resi st ance Di r ect or y

1. 2 SYSTEM DESCRI PTI ON

Pr ovi de sound cont r ol l i ng uni t s mechani cal l y mount ed on a cei l i ng suspensi on syst em f or acoust i cal t r eat ment . The uni t s i ze, t ext ur e, f i ni sh, and col or must be as speci f i ed. The l ocat i on and ext ent of acoust i cal t r eat ment shal l be as shown on t he appr oved det ai l dr awi ngs.

Submi t dr awi ngs showi ng suspensi on syst em, met hod of anchor i ng and f ast eni ng, det ai l s, and r ef l ect ed cei l i ng pl an. Coor di nat e wi t h par agr aph RECLAMATI ON PROCEDURES f or r ecl amat i on of mi ner al f i ber acoust i cal cei l i ng panel s t o be r emoved f r om t he j ob s i t e.

1. 2. 1 Fi r e Resi st i ve Cei l i ngs

Rat e acoust i cal cei l i ng syst ems, i ndi cat ed as f i r e r esi st ant , f or f i r e endur ance as speci f i ed when t est ed i n accor dance wi t h ASTM E119. Test suspended cei l i ng wi t h a speci men r oof or f l oor assembl y r epr esent at i ve of

Apr i l 2019 Page 2 SECTI ON 09 51 00 t he i ndi cat ed const r uct i on, i ncl udi ng mechani cal and el ect r i cal wor k wi t hi n cei l i ng space openi ngs f or l i ght f i x t ur es, and ai r out l et s, and access panel s. Pr ovi de cei l i ng assembl y r at i ng f or 1, 1- 1/ 2, 2, 3, or 4 hour , conceal ed gr i d or exposed gr i d syst em as shown on dr awi ngs. Pr ovi de acoust i cal uni t s wi t h a f l ame spr ead of 25 or l ess and smoke devel opment of 50 or l ess when t est ed i n accor dance wi t h ASTM E84.

1. 2. 2 Cei l i ng At t enuat i on Cl ass and Test

Pr ovi de a cei l i ng syst em wi t h an at t enuat i on c l ass ( CAC) of 39 when det er mi ned i n accor dance wi t h ASTM E1414/ E1414M. Pr ovi de f i xt ur e at t enuat or s over l i ght f i x t ur es and ot her cei l i ng penet r at i ons, and pr ovi de acoust i cal bl anket i nsul at i on adj acent t o par t i t i ons, as r equi r ed t o achi eve t he speci f i ed CAC. Pr ovi de t est cei l i ng cont i nuous at t he par t i t i on and assembl ed i n t he suspensi on syst em i n t he same manner t hat t he cei l i ng wi l l be i nst al l ed on t he pr oj ect .

1. 2. 3 Cei l i ng Sound Absor pt i on

Det er mi ne t he Noi se Reduct i on Coef f i c i ent ( NRC) i n accor dance wi t h ASTM C423 Test Met hod.

1. 2. 4 Li ght Ref l ect ance

Det er mi ne l i ght r ef l ect ance f act or i n accor dance wi t h ASTM E1477 Test Method.

1. 2. 5 Ot her Submi t t al s Requi r ement s

The f ol l owi ng shal l be submi t t ed:

a. Manuf act ur er ' s dat a i ndi cat i ng per cent age of r ecycl e mat er i al i n acoust i c cei l i ng t i l es t o ver i f y af f i r mat i ve pr ocur ement compl i ance.

b. Tot al wei ght and vol ume quant i t i es of acoust i c cei l i ng t i l es wi t h r ecycl e mat er i al .

c. Manuf act ur er ' s cat al og showi ng UL cl assi f i cat i on of f i r e- r at ed cei l i ngs gi v i ng mat er i al s, const r uct i on det ai l s, t ypes of f l oor and r oof const r uct i ons t o be pr ot ect ed, and UL desi gn number and f i r e pr ot ect i on t i me r at i ng f or each r equi r ed f l oor or r oof const r uct i on and acoust i c cei l i ng assembl y.

d. Repor t s by an i ndependent t est i ng l abor at or y at t est i ng t hat acoust i cal cei l i ng syst ems meet speci f i ed f i r e endur ance and sound t r ansmi ssi on r equi r ement s. Dat a at t est i ng t o conf or mance of t he pr oposed syst em t o Under wr i t er s Labor at or i es r equi r ement s f or t he f i r e endur ance r at i ng l i s t ed i n UL Fi r e Resi st ance may be submi t t ed i n l i eu of t est r epor t s.

e. Cer t i f i cat e at t est i ng t hat t he mi ner al based acoust i cal uni t s f ur ni shed f or t he pr oj ect cont ai n r ecycl ed mat er i al and showi ng an est i mat ed per cent of such mat er i al .

1. 3 SUBMITTALS

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" desi gnat i on;

submi t t al s not havi ng a " G" desi gnat i on ar e f or Cont r act or Qual i t y Cont r ol appr oval . Submi t t al s wi t h an " S" ar e f or i ncl usi on i n t he Sust ai nabi l i t y Not ebook, i n conf or mance t o Sect i on 01 33 29 SUSTAI NABI LI TY REPORTI NG.

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Submi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00 SUBMI TTAL

PROCEDURES:

SD- 02 Shop Dr awi ngs

Appr oved Det ai l Dr awi ngs

SD- 03 Pr oduct Dat a

Acoust i cal Cei l i ng Syst ems

SD- 04 Sampl es

Acoust i cal Uni t s Acoust i c Cei l i ng Ti l es

SD- 06 Test Repor t s

Fi r e Resi st i ve Cei l i ngs Cei l i ng At t enuat i on Cl ass and Test

SD- 07 Cer t i f i cat es

Acoust i cal Uni t s Acoust i c Cei l i ng Ti l es

1. 4 DELI VERY, STORAGE. AND HANDLI NG

Del i ver mat er i al s t o t he s i t e i n t he manuf act ur er ' s or i gi nal unopened cont ai ner s wi t h br and name and t ype cl ear l y mar ked. Car ef ul l y handl e and st or e mat er i al s i n dr y, wat er t i ght encl osur es. I mmedi at el y bef or e i nst al l at i on, st or e acoust i cal uni t s f or not l ess t han 24 hour s at t he same t emper at ur e and r el at i ve humi di t y as t he space wher e t hey wi l l be i nst al l ed i n or der t o assur e pr oper t emper at ur e and moi st ur e accl i mat i on.

1. 5 ENVI RONMENTAL REQUI REMENTS

Mai nt ai n a uni f or m t emper at ur e of not l ess t han 60 degr ees F nor mor e t han 85 degr ees F and a r el at i ve humi di t y of not mor e t han 70 per cent f or 24 hour s bef or e, dur i ng, and 24 hour s af t er i nst al l at i on of acoust i cal uni t s.

1. 6 SCHEDULING

Compl et e and dr y i nt er i or f i ni sh wor k such as pl ast er i ng, concr et e and t er r azzo wor k bef or e cei l i ng i nst al l at i on. Compl et e mechani cal , el ect r i cal , and ot her wor k above t he cei l i ng l i ne; i nst al l and st ar t oper at i ng heat i ng, vent i l at i ng, and ai r condi t i oni ng syst ems i n or der t o mai nt ai n t emper at ur e and humi di t y r equi r ement s.

1. 7 WARRANTY

Pr ovi de manuf act ur er ' s st andar d per f or mance guar ant ees or war r ant i es t hat ext end beyond a one year per i od. I ncl ude an agr eement t o r epai r or r epl ace acoust i cal panel s t hat f ai l wi t hi n t he war r ant y per i od i n t he st andar d per f or mance guar ant ee or war r ant y. Fai l ur es i ncl ude, but ar e not l i mi t ed t o, saggi ng and war pi ng of panel s; r ust i ng and manuf act ur er s def ect s of gr i d syst em.

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1. 8 EXTRA MATERI ALS

Fur ni sh spar e t i l es, f r om t he same l ot as t hose i nst al l ed, of each col or at t he r at e of 5 t i l es f or each 1000 t i l es i nst al l ed.

PART 2 PRODUCTS

2. 1 ACOUSTI CAL UNI TS

Compl y wi t h EPA r equi r ement s i n accor dance wi t h Sect i on 01 33 29 SUSTAI NABI LI TY REPORTI NG. Submi t t wo sampl es of each t ype of acoust i cal uni t and each t ype of suspensi on gr i d t ee sect i on showi ng t ext ur e, f i ni sh, and col or . Conf or m acoust i cal uni t s t o ASTM E1264, Cl ass A, and t he f ol l owi ng r equi r ement s:

2. 1. 1 Af f i r mat i ve Pr ocur ement

Mi ner al Wool , Cel l ul ose, and Lami nat ed Paper boar d used i n acoust i c cei l i ng t i l es ar e mat er i al s l i s t ed i n t he EPA' s Compr ehensi ve Pr ocur ement Gui del i nes ( CPG) ( http://www.epa.gov/cpg/ ) . EPA' s r ecommended Recover ed Mat er i al s Cont ent Level s f or Mi ner al Wool , Cel l ul ose, St r uct ur al Fi ber boar d and Lami nat ed Paper boar d ar e:

Product Material Per cent of Post Consumer Mat er i al s

Per cent of Tot al Recover ed Mat er i al s

Lami nat e Paper boar d Post Consumer Paper 100 100

Rock Wool Slag 75

Cellulose Post Consumer Paper 75 75

a. The r ecommended r ecover ed mat er i al s cont ent l evel s ar e based on t he wei ght ( not vol ume) of mat er i al s i n t he i nsul at i ng cor e onl y.

b. Submi t r ecycl ed mat er i al cont ent dat a f or acoust i c cei l i ng t i l es i ndi cat i ng compl i ance wi t h af f i r mat i ve pr ocur ement .

c. Submi t t ot al wei ght and vol ume quant i t i es of acoust i c cei l i ng t i l es wi t h r ecycl e mat er i al .

2. 1. 2 I mpact / Abr asi on Resi st ant Uni t s

2. 1. 2. 1 Type

Non- asbest os mi ner al composi t i on wi t h a har dened mi ner al sur f ace and f act or y appl i ed whi t e pai nt f i ni sh. Pr ovi de a sur f ace r esi st ant t o i mpact and abr asi on.

2. 1. 2. 2 Fl ame Spr ead

Cl ass A, 25 or l ess

2. 1. 2. 3 Pattern

As i ndi cat ed.

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2. 1. 2. 4 Mi ni mum NRC

. 95 when t est ed on Mount i ng Type E- 400 of ASTM E795.

2. 1. 2. 5 Mi ni mum Li ght Ref l ect ance Coef f i c i ent

LR- 1, 0. 75 or gr eat er

2. 1. 2. 6 Nomi nal Si ze

24 by 24 by 1 i nch

2. 1. 2. 7 Edge Det ai l

Squar e or bevel ed as i ndi cat ed.

2. 1. 2. 8 Joi nt Det ai l

Tr i mmed and but t ed

2. 1. 3 Humi di t y Resi st ant Composi t i on Uni t s

2. 1. 3. 1 Type

Non- asbest os mi ner al or gl ass f i ber s bonded wi t h cer ami c, moi st ur e r esi st ant t her mo- set t i ng r esi n, or ot her moi st ur e r esi st ant mat er i al and havi ng a f act or y appl i ed whi t e pai nt f i ni sh. Pr ovi de panel s t hat do not sag or war p under condi t i ons of heat , hi gh humi di t y or chemi cal f umes.

2. 1. 3. 2 Fl ame Spr ead

Cl ass: A, 25 or l ess

2. 1. 3. 3 Pattern

As i ndi cat ed.

2. 1. 3. 4 Mi ni mum NRC

Mi ni mum . 95 when t est ed on Mount i ng Type E- 400 of ASTM E795.

2. 1. 3. 5 Mi ni mum Li ght Ref l ect ance Coef f i c i ent

LR- 1, 0. 75 or gr eat er

2. 1. 3. 6 Nomi nal Si ze

24 by 48, or as i ndi cat ed. i nch

2. 1. 3. 7 Edge Det ai l

Square

2. 2 SUSPENSI ON SYSTEM

Pr ovi de st andar d f i r e- r esi st i ve st andar d wi dt h f l ange as shown on dr awi ngs suspensi on syst em conf or mi ng t o ASTM C635/ C635M f or i nt er medi at e- dut y syst ems . Pr ovi de sur f aces exposed t o v i ew of al umi num or st eel wi t h a f act or y- appl i ed whi t e baked- enamel f i ni sh . Pr ovi de wal l mol di ng havi ng a

Apr i l 2019 Page 6 SECTI ON 09 51 00 f l ange of not l ess t han 15/ 16 i nch . Pr ovi de st andar d cor ner s.

Suspended cei l i ng f r ami ng syst em must have t he capabi l i t y t o suppor t t he f i ni shed cei l i ng, l i ght f i x t ur es, ai r di f f user s, and accessor i es, as shown. Pr ovi de a suspensi on syst em wi t h a maxi mum def l ect i on of 1/ 360 of t he span l engt h. Conf or m sei smi c det ai l s t o t he gui dance i n UFC 3- 310- 04 and ASTM E580/ E580M .

2. 3 HANGERS

Pr ovi de hanger s and at t achment capabl e of suppor t i ng a mi ni mum 300 pound ul t i mat e ver t i cal l oad wi t hout f ai l ur e of suppor t i ng mat er i al or attachment.

2. 3. 1 Wires

Conf or m wi r es t o ASTM A641/ A641M, Cl ass 1, 0. 08 i nch ( 12 gauge) i n diameter.

2. 3. 2 Straps

Pr ovi de st r aps of 1 by 3/ 16 i nch gal vani zed st eel conf or mi ng t o ASTM A653/ A653M, wi t h a l i ght commer ci al z i nc coat i ng or ASTM A1008/ A1008M wi t h an el ect r odeposi t ed z i nc coat i ng conf or mi ng t o ASTM B633, Type RS.

2. 3. 3 Rods

Pr ovi de 3/ 16 i nch di amet er t hr eaded st eel r ods, z i nc or cadmi um coat ed.

2. 3. 4 Eyebolts

Pr ovi de eyebol t s of wel dl ess, f or ged- car bon- st eel , wi t h a st r ai ght - shank i n accor dance wi t h ASTM A489. Eyebol t s i ze must be a mi ni mum 1/ 4 i nch, z i nc coat ed or cadmi um pl at ed.

2. 3. 5 Masonr y Anchor age Devi ces

Compl y wi t h ASTM C636/ C636M f or anchor age devi ces f or eyebol t s, machi ne scr ews, and wood scr ews.

2. 4 ACCESS PANELS

Pr ovi de access panel s t hat mat ch adj acent acoust i cal uni t s, desi gned and equi pped wi t h sui t abl e f r ami ng and f ast eni ngs f or r emoval and r epl acement wi t hout damage. Si ze panel t o be not l ess t han 12 by 12 i nch or mor e t han 12 by 24 i nch.

a. At t ach an i dent i f i cat i on pl at e of 0. 032 i nch t hi ck al umi num, 3/ 4 i nch i n di amet er , st amped wi t h t he l et t er s " AP" and f i ni shed t he same as t he uni t , near one cor ner on t he f ace of each access panel .

b. I dent i f y cei l i ng access panel by a number ut i l i z i ng whi t e i dent i f i cat i on pl at es or pl ast i c but t ons wi t h cont r ast i ng numer al s.

Pr ovi de pl at es or but t ons of mi ni mum 1 i nch di amet er and secur el y at t ached t o one cor ner of each access uni t . Pr ovi de a t ypewr i t t en car d f r amed under gl ass l i s t i ng t he code i dent i f i cat i on number s and cor r espondi ng syst em descr i pt i ons l i s t ed above. Mount t he f r amed car d wher e di r ect ed and f ur ni sh a dupl i cat e car d t o t he Cont r act i ng Of f i cer . Code i dent i f i cat i on syst em i s as f ol l ows:

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1 Fi r e det ect i on/ al ar m syst em

2 Ai r condi t i oni ng cont r ol s

3 Pl umbi ng syst em

4 Heat i ng and st eam syst ems

5 Ai r condi t i oni ng duct syst em

6 Spr i nkl er syst em

7 I nt er communi cat i on syst em

8 Nur se' s cal l syst em

9 Pneumat i c t ube syst em

10 Medi cal pi pi ng syst em

11 Pr ogr am ent er t ai nment

12 Tel ephone j unct i on boxes

13 Det ect or X- r ay

2. 5 ADHESIVE

Use adhesi ve as r ecommended by t i l e manuf act ur er .

2. 6 FINISHES

Use manuf act ur er ' s st andar d t ext ur es, pat t er ns and f i ni shes as speci f i ed f or acoust i cal uni t s and suspensi on syst em member s. Tr eat cei l i ng suspensi on syst em component s t o i nhi bi t cor r osi on.

2. 7 COLORS AND PATTERNS

Use col or s and pat t er ns f or acoust i cal uni t s and suspensi on syst em component s as speci f i ed i n Sect i on 09 06 90 SCHEDULES FOR PAI NTI NG AND

COATI NG .

2. 8 ACOUSTI CAL SEALANT

Conf or m acoust i cal seal ant t o ASTM C834, nonst ai ni ng.

PART 3 EXECUTI ON

3. 1 INSTALLATION

Exami ne sur f aces t o r ecei ve di r ect l y at t ached acoust i cal uni t s f or unevenness, i r r egul ar i t i es, and dampness t hat woul d af f ect qual i t y and execut i on of t he wor k. Ri d ar eas, wher e acoust i cal uni t s wi l l be cement ed, of oi l s , f or m r esi due, or ot her mat er i al s t hat r educe bondi ng capabi l i t i es of t he adhesi ve. Compl et e and dr y i nt er i or f i ni sh wor k such as pl ast er i ng, concr et e, and t er r azzo wor k bef or e i nst al l at i on. Compl et e and appr ove mechani cal , el ect r i cal , and ot her wor k above t he cei l i ng l i ne pr i or t o t he st ar t of acoust i cal cei l i ng i nst al l at i on. Pr ovi de acoust i cal

Apr i l 2019 Page 8 SECTI ON 09 51 00 wor k compl et e wi t h necessar y f ast eni ngs, c l i ps, and ot her accessor i es r equi r ed f or a compl et e i nst al l at i on. Do not expose mechani cal f ast eni ngs i n t he f i ni shed wor k. Lay out hanger s f or each i ndi v i dual r oom or space.

Pr ovi de hanger s t o suppor t f r ami ng ar ound beams, duct s, col umns, gr i l l es, and ot her penet r at i ons t hr ough cei l i ngs. Keep mai n r unner s and car r y i ng channel s c l ear of abut t i ng wal l s and par t i t i ons. Pr ovi de at l east t wo mai n r unner s f or each cei l i ng span. Wher ever r equi r ed t o bypass an obj ect wi t h t he hanger wi r es, i nst al l a subsuspensi on syst em so t hat al l hanger wi r es wi l l be pl umb.

3. 1. 1 Suspensi on Syst em

I nst al l suspensi on syst em i n accor dance wi t h ASTM C636/ C636M and as speci f i ed her ei n. Do not suspend hanger wi r es or ot her l oads f r om under si de of st eel decki ng.

3. 1. 1. 1 Pl umb Hanger s

I nst al l hanger s pl umb and not pr essi ng agai nst i nsul at i on cover i ng duct s and pi pes. Wher e l i ght i ng f i x t ur es ar e suppor t ed f r om t he suspended cei l i ng syst em, pr ovi de hanger s at a mi ni mum of f our hanger s per f i x t ur e and l ocat ed not mor e t han 6 i nch f r om each cor ner of each f i xt ur e.

3. 1. 1. 2 Spl ayed Hanger s

Wher e hanger s must be spl ayed ( s l oped or s l ant ed) ar ound obst r uct i ons, of f set t he r esul t i ng hor i zont al f or ce by br aci ng, count er spl ayi ng, or ot her accept abl e means.

3. 1. 2 Wal l Mol di ng

Pr ovi de wal l mol di ng wher e cei l i ngs abut ver t i cal sur f aces. Mi t er cor ner s wher e wal l mol di ngs i nt er sect or i nst al l cor ner caps. Secur e wal l mol di ng not mor e t han 3 i nch f r om ends of each l engt h and not mor e t han 16 i nch on cent er s bet ween end f ast eni ngs. Pr ovi de wal l mol di ng spr i ngs at each acoust i cal uni t i n semi - exposed or conceal ed syst ems.

3. 1. 3 Acoust i cal Uni t s

I nst al l acoust i cal uni t s i n accor dance wi t h t he appr oved i nst al l at i on i nst r uct i ons of t he manuf act ur er . Ensur e t hat edges of acoust i cal uni t s ar e i n c l ose cont act wi t h met al suppor t s, wi t h each ot her , and i n t r ue al i gnment . Ar r ange acoust i cal uni t s so t hat uni t s l ess t han one- hal f wi dt h ar e mi ni mi zed. Hol d uni t s i n exposed- gr i d syst em i n pl ace wi t h manuf act ur er ' s st andar d hol d- down cl i ps, i f uni t s wei gh l ess t han 1 psf or i f r equi r ed f or f i r e r esi st ance r at i ng.

3. 1. 4 Caulking

Seal al l j oi nt s ar ound pi pes, duct s or el ect r i cal out l et s penet r at i ng t he cei l i ng. Appl y a cont i nuous r i bbon of acoust i cal seal ant on ver t i cal web of wal l or edge mol di ngs.

3. 1. 5 Adhesi ve Appl i cat i on

Wi pe back of t i l e t o r emove accumul at ed dust . Daub acoust i cal uni t s on back si de wi t h f our equal daubs of adhesi ve. Appl y daubs near cor ner s of t i l es. Ensur e t hat cont act ar ea of each daub i s at l east 2 i nch di amet er i n f i nal posi t i on. Pr ess uni t s i nt o pl ace, al i gni ng j oi nt s and abut t i ng

Apr i l 2019 Page 9 SECTI ON 09 51 00 uni t s t i ght and uni f or m wi t hout di f f er ences i n j oi nt wi dt hs.

3. 2 CEI LI NG ACCESS PANELS

Locat e cei l i ng access panel s di r ect l y under t he i t ems whi ch r equi r e access.

3. 3 CLEANING

Fol l owi ng i nst al l at i on, c l ean di r t y or di scol or ed sur f aces of acoust i cal uni t s and l eave t hem f r ee f r om def ect s. Remove uni t s t hat ar e damaged or i mpr oper l y i nst al l ed and pr ovi de new uni t s as di r ect ed.

3. 4 RECLAMATI ON PROCEDURES

Neat l y st ack cei l i ng t i l e, desi gnat ed f or r ecycl i ng by t he Cont r act i ng Of f i cer , on 4 by 4 f oot pal l et s not hi gher t han 4 f oot . Panel s must be compl et el y dr y. Shr i nk wr ap and symmet r i cal l y st ack pal l et s on t op of each ot her wi t hout f al l i ng over .

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