08 51 23.pdf

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

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STEEL WI NDOWS

04/17

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.

ASME I NTERNATI ONAL ( ASME)

ASME B18. 6. 3 ( 2013) Machi ne Scr ews, Tappi ng Scr ews, and Machi ne Dr i ve Scr ews ( I nch Ser i es)

ASTM I NTERNATI ONAL ( ASTM)

ASTM A1011/ A1011M ( 2015) St andar d Speci f i cat i on f or St eel , Sheet , and St r i p, Hot - 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 and Ul t r a- Hi gh St r engt h

ASTM A123/ A123M ( 2013) St andar d Speci f i cat i on f or Zi nc ( Hot - Di p Gal vani zed) Coat i ngs on I r on and St eel Pr oduct s

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 D3656/ D3656M ( 2013) I nsect Scr eeni ng and Louver Cl ot h Woven f r om Vi nyl - Coat ed Gl ass Yar ns

ASTM E283 ( 2004; R 2012) Det er mi ni ng t he Rat e of Ai r Leakage Thr ough Ext er i or Wi ndows, Cur t ai n Wal l s, and Door s Under Speci f i ed Pr essur e Di f f er ences Acr oss t he Speci men

ASTM E330/ E330M ( 2014) St r uct ur al Per f or mance of Ext er i or Wi ndows, Door s, Skyl i ght s and Cur t ai n Wal l s by Uni f or m St at i c Ai r Pr essur e Difference

ASTM E331 ( 2000; R 2016) St andar d Test Met hod f or Wat er Penet r at i on of Ext er i or Wi ndows, Skyl i ght s, Door s, and Cur t ai n Wal l s by Uni f or m St at i c Ai r Pr essur e Di f f er ence

NATI ONAL FENESTRATI ON RATI NG COUNCI L ( NFRC)

NFRC 100 ( 2014) Pr ocedur e f or Det er mi ni ng Fenest r at i on Pr oduct U- Fact or s

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NFRC 200 ( 2014) Pr ocedur e f or Det er mi ni ng Fenest r at i on Pr oduct Sol ar Heat Gai n Coef f i c i ent and Vi s i bl e Tr ansmi t t ance at Nor mal I nci dence

NATI ONAL FI RE PROTECTI ON ASSOCI ATI ON ( NFPA)

NFPA 101 ( 2015; ERTA 2015) Li f e Saf et y Code

NFPA 80 ( 2016) St andar d f or Fi r e Door s and Ot her Openi ng Pr ot ect i ves

STEEL WI NDOW I NSTI TUTE ( SWI )

SWI SWS ( 2005) St eel Wi ndow Speci f i cat i ons

1. 2 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 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

Windows

I ndi cat e el evat i ons of wi ndows, f ul l - s i ze sect i ons, t hi cknesses and gages of met al , f ast eni ngs, pr oposed met hod of anchor i ng, s i ze and spaci ng of anchor s, det ai l s of const r uct i on, met hod of gl azi ng, det ai l s of oper at i ng har dwar e, mul l i on det ai l s, met hod and mat er i al s f or weat her st r i ppi ng, met hod of at t achment of scr eens, met al subf r ames, st ool s, casi ngs, s i l l s , t r i m, ot her r el at ed i t ems, and i nst al l at i on det ai l s.

SD- 03 Pr oduct Dat a

St eel Fr ami ng Mat er i al s

Mullions

Hardware

Fasteners

Accessories

Operators

Screens

SD- 04 Sampl es

Col or Coat i ng; G

Submi t char t of manuf act ur er ' s col or coat i ngs i f f act or y f i ni sh i s t o be pr ovi ded i n l i eu of f i el d pai nt i ng.

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Windows

Submi t one compl et e, f ul l s i ze gl azed wi ndow of each t ype pr oposed f or use, compl et e wi t h har dwar e, anchor s, and ot her accessor i es.

Wher e scr eens or weat her st r i ppi ng ar e r equi r ed, f i t sampl e wi ndows wi t h such i t ems t hat ar e t o be used. Af t er appr oval , i nst al l each sampl e i n t he wor k, c l ear l y i dent i f i ed, wi t h l ocat i on r ecor ded.

SD- 06 Test Repor t s

Ai r I nf i l t r at i on

Wat er I nf i l t r at i on

Mul l i on and Tr ansom Bar Wi nd Load

SD- 10 Oper at i on and Mai nt enance Dat a

Wi ndows, Dat a Package 1; G

Submi t i n accor dance wi t h t he r equi r ement s of Sect i on 01 78 23

OPERATI ON AND MAI NTENANCE DATA.

SD- 11 Cl oseout Submi t t al s

Recycl ed Cont ent f or St eel Fr ami ng Mat er i al s; S

1. 3 TEST REPORT REQUI REMENTS

1. 3. 1 Ai r and Wat er I nf i l t r at i on

ASTM E283 and ASTM E331. Do not exceed maxi mum ai r i nf i l t r at i on of one- hal f cubi c f oot per mi nut e per f oot of cr ack l engt h when subj ect ed t o a st at i c pr essur e of 1. 56 pounds per squar e f oot ( equi val ent t o a wi nd vel oci t y of 25 mi l es per hour ( mph) ) . Wat er i nf i l t r at i on must be " zer o. "

1. 3. 2 Mul l i on and Tr ansom Bar Wi nd Load Test s

ASTM E330/ E330M. Member s must wi t hst and a uni f or m wi nd l oad of 20 pounds per squar e f oot of wi ndow ar ea wi t hout def l ect i ng mor e t han 1/ 175 of t he span.

1. 4 DELI VERY AND STORAGE

Del i ver t o pr oj ect s i t e i n undamaged condi t i on. St or e wi ndows and component s on edge, out of cont act wi t h t he gr ound, under weat her t i ght cover i ng, and ar r anged t o avoi d bendi ng, war pi ng, or ot her damage.

PART 2 PRODUCTS

2. 1 PRODUCT SUSTAI NABI LI TY CRI TERI A

2. 1. 1 Recycl ed Cont ent f or St eel Fr ami ng Mat er i al s

Pr ovi de st eel f r ami ng mat er i al s meet i ng t he r ecycl ed cont ent r equi r ement s as st at ed wi t hi n t hi s sect i on and pr ovi de document at i on i n accor dance wi t h Sect i on 01 33 29 SUSTAI NABI LI TY REPORTI NG par agr aph RECYCLED CONTENT.

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2. 2 MATERIALS

2. 2. 1 Gener al Syst em Requi r ement s

St eel f r ami ng mat er i al s must cont ai n a mi ni mum of 10 per cent post - consumer r ecycl ed cont ent , or a mi ni mum of 20 per cent post - i ndust r i al r ecycl ed cont ent . See Sect i on 01 33 29 SUSTAI NABI LI TY REPORTI NG f or cumul at i ve t ot al r ecycl ed cont ent r equi r ement s. Met al mat er i al s may cont ai n post - consumer or post - i ndust r i al r ecycl ed cont ent .

Non- r esi dent i al gl azed syst ems ( i ncl udi ng f r ames and gl ass) must be cer t i f i ed by t he Nat i onal Fenest r at i on Rat i ng Counci l wi t h a whol e- wi ndow Sol ar Heat Gai n Coef f i c i ent ( SHGC) maxi mum of 0. 30 det er mi ned accor di ng t o NFRC 200 pr ocedur es and a U- f act or maxi mum of 0. 46 Bt u per squar e f oot by hr by degr ee F i n accor dance wi t h NFRC 100.

2. 2. 2 St eel Bar s

SWI SWS.

2. 2. 3 Sheet St eel

ASTM A1011/ A1011M.

2. 2. 4 Zi nc- Coat ed Sheet St eel

ASTM A653/ A653M.

2. 2. 5 Zi nc Coat i ng

ASTM A123/ A123M.

2. 2. 6 Scr ews and Bol t s

ASME B18. 6. 3 as appl i cabl e.

2. 3 FABRI CATI ON OF WI NDOWS

For m per manent j oi nt s by wel di ng or mechani cal l y f ast eni ng as speci f i ed f or each t ype wi ndow. Use j oi nt s of st r engt h t o mai nt ai n st r uct ur al val ue of member s connect ed. Wel d j oi nt s sol i d, r emove excess met al , and dr ess smoot h on exposed and cont act sur f aces. Cl osel y f i t j oi nt s f or med wi t h mechani cal f ast eni ngs and make per manent l y wat er t i ght . Assembl e f r ames and sash, i ncl udi ng vent i l at or s and t her mal br eaks, at t he pl ant and shi p as a uni t wi t h har dwar e unat t ached. Pr ovi de t he f ol l owi ng const r uct i on:

a. Wher e f i xed wi ndow sect i ons adj oi n vent i l at or sect i ons, pr ovi de f i xed sash, f abr i cat ed f r om si mi l ar f r ame member s, and of manuf act ur er ' s st andar d t ype sui t abl e f or t he pur pose.

b. Rol l weat her i ng sur f aces i nt egr al l y t o pr ovi de t wo- poi nt par al l el - sur f ace cont act wi t h over l ap at bot h i nsi de and out si de poi nt s of c l osur e.

c. Pr ovi de dr i ps and weep hol es as r equi r ed t o r et ur n wat er t o out si de.

d. Desi gn gl azed wi ndows and r abbet s sui t abl e f or gl ass t hi ckness shown on dr awi ngs or speci f i ed.

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e. Use f l at head, cr oss r ecessed t ype, exposed head scr ews and bol t s wi t h st andar d t hr eads on wi ndows, t r i m and accessor i es. Scr ew heads must f i ni sh f l ush wi t h adj oi ni ng sur f aces. Sel f t appi ng sheet - met al scr ews ar e not accept abl e.

f . For hot - di pped gal vani zed wi ndows, use st ai nl ess st eel or hot - spun gal vani zed st eel f ast ener s. For wi ndows wi t h pai nt ed f i ni sh use cadmi um pl at ed or el ect r o- gal vani zed f ast ener s. Fi ni sh exposed heads t o mat ch f i ni sh of wi ndows.

2. 4 FI RE RATED WI NDOWS

Pr ovi de sash and f r ame wi t h necessar y har dwar e t o conf or m t o t he r equi r ement s of Under wr i t er s Labor at or i es I nc. ( UL) , f or c l ass of wi ndow i ndi cat ed. Submi t pr oof of conf or mance. UL l abel wi l l be accept ed as pr oof . Label ed wi ndow det ai l s t ake pr ecedence over det ai l s i ndi cat ed or speci f i ed f or nonl abel ed wi ndows, except when sect i ons r equi r ed f or nonl abel ed wi ndows ar e heavi er t han t hose r equi r ed by UL. I n l i eu of UL l abel , wr i t t en cer t i f i cat i on by appr oved nat i onal l y r ecogni zed t est i ng agency may be submi t t ed. Cer t i f i cat i on must st at e t hat compl et e wi ndow uni t of t ype pr ovi ded has been t est ed and conf or ms t o publ i shed st andar ds, i ncl udi ng met hods of t est s, of UL.

2. 5 PROVI SI ONS FOR GLAZI NG

Desi gn sash f or out si de gl azi ng and f or secur i ng gl ass wi t h met al beads and gl azi ng compound. Wher e i nsul at i ng gl ass i s i ndi cat ed, use r abbet s of adequat e wei ght and dept h t o r ecei ve and pr oper l y suppor t gl ass and gl azi ng accessor i es.

2. 6 MULLI ONS AND TRANSOM BARS

Pr ovi de mul l i ons bet ween mul t i pl e wi ndow uni t s desi gned t o wi t hst and speci f i ed wi nd l oad r equi r ement s. Pr ovi de mul l i ons wi t h a t her mal br eak.

Secur e mul l i ons and t r ansom bar s t o adj oi ni ng const r uct i on and wi ndow uni t s i n such a manner as t o per mi t expansi on and cont r act i on and t o f or m weat her t i ght j oi nt . Pr ovi de mul l i on cover s of manuf act ur er ' s st ock desi gn on t he i nt er i or and ext er i or t o compl et el y cover exposed j oi nt s and r ecesses bet ween wi ndow uni t s and f or neat appear ance.

2. 7 METAL- TO- METAL JOI NTS

Set i n mast i c, usi ng t ype r ecommended by wi ndow manuf act ur er t o pr ovi de weat her t i ght j oi nt s. Remove excess mast i c bef or e i t har dens.

2. 8 ACCESSORIES

Pr ovi de wi ndows wi t h har dwar e, c l i ps, f i ns, anchor s, gl azi ng beads, and f ast eni ngs, necessar y f or compl et e i nst al l at i on and oper at i on of ventilators.

2. 8. 1 Anchors

Use hot - di p gal vani zed st eel anchor s. Secur e anchor s and f ast eni ngs t o heads, j ambs, and si l l s of openi ngs, and f ast en secur el y t o wi ndows or f r ames. Use anchor s r ecommended by wi ndow manuf act ur er f or speci f i c t ype of const r uct i on and conceal . Anchor each f r ame at j ambs wi t h mi ni mum of t hr ee adj ust abl e st eel anchor s.

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2. 8. 2 Weatherstripping

Pr ovi de on al l oper abl e wi ndows so t hat , when t est ed bef or e l eavi ng f act or y, i n accor dance wi t h ASTM E283, do not exceed a maxi mum ai r i nf i l t r at i on of one hal f cubi c f oot per mi nut e per f oot of cr ack l engt h when subj ect ed t o st at i c pr essur e of 1. 56 pounds per squar e f oot equi val ent t o wi nd vel oci t y of 25 mph.

2. 8. 3 Hardware

Equi p al l oper abl e sash wi t h l at chi ng devi ce whi ch can be secur ed f r om i nsi de. The i t em, t ype, and f unct i on of har dwar e r equi r ed i s speci f i ed under i ndi v i dual wi ndow t ype. At t ach har dwar e secur el y t o wi ndows wi t h cor r osi on r esi st i ng bol t s or machi ne scr ews; do not use sheet met al scr ews. At f i xed scr eens, adapt har dwar e t o per mi t oper at i on of vent i l at or s. Fi t and t est har dwar e f or each wi ndow at f act or y t o ensur e sat i sf act or y oper at i on and secur i t y.

2. 8. 3. 1 Har dwar e Mat er i al s and Fi ni sh

Pr ovi de non- magnet i c t ype st ai nl ess st eel exposed har dwar e wi t h sat i n f i ni sh; whi t e br onze wi t h sat i n f i ni sh; yel l ow br onze wi t h dul l ( oxi di zed) f i ni sh. Use st eel or mal l eabl e i r on hi nges, wi t h nonf er r ous pi ns, or wi t h st eel pi ns and non- f er r ous bushi ngs or washer s.

2. 8. 4 Fasteners

Pr i me exposed heads of coat ed or pl at ed f ast ener s and f i ni sh t o mat ch adj acent mat er i al .

2. 8. 5 Met al Sub- f r ames and St ool s

Manuf act ur er ' s st andar d t ype desi gned t o sui t t he par t i cul ar wi ndow.

Mat ch exposed sur f aces t o wi ndows.

2. 9 WI NDOW FI NI SH

2. 9. 1 Shop Pr i med Fi ni sh

Af t er f abr i cat i on, c l ean al l sur f aces of wi ndows, f i ns, mul l i ons, cover pl at es, and scr een f r ames and pr ovi de a hot - di p gal vani zed, phosphat e- t r eat ed and shop pr i med f i ni sh. Conf or m t o SWI SWS f or t he met hods of c l eani ng, chemi cal t r eat ment , gal vani z i ng, and pai nt i ng.

2. 9. 2 Fact or y Fi ni sh

I n l i eu of shop pr i med f i ni sh, f act or y f i ni sh may be pr ovi ded usi ng t he f ol l owi ng met hod, i n whi ch case f i ni sh f i el d pai nt i ng wi l l not be r equi r ed:

a. Chemi cal l y c l ean and bonder i ze wi ndows. Appl y di p coat of epoxy pr i mer baked on f or not l ess t han 15 mi nut es at not l ess t han 300 degr ees F, f ol l owed by f i ni sh coat of al kyd- ami ne enamel of not l ess t han one mi l t hi ckness, baked on f or 15 mi nut es at not l ess t han 300 degr ees F.

b. Fi ni sh col or coat i ng t o be sel ect ed f r om manuf act ur er ' s st andar d col or chart.

c. Touch up abr aded sur f aces wi t h enamel as speci f i ed f or f act or y f i ni sh.

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2. 10 WI NDOW TYPES

Conf or m t o SWI SWS. Pr ovi de combi nat i ons, t ypes and si zes i ndi cat ed. Each wi ndow must consi st of a uni t i ncl udi ng subf r ame, f r ame, sash, har dwar e, mul l i ons, t r i m, i nsect scr een, and anchor s. Desi gn wi ndows i ndi cat ed t o have scr een t o accommodat e i t ems t o be f ur ni shed.

2. 10. 1 Fi xed Wi ndows

Heavy I nt er medi at e wi ndows.

2. 11 SCREENS

Pr ovi de one i nsect scr een f or each oper abl e ext er i or sash or vent i l at or .

Locat e scr een uni t s ei t her i nsi de or out si de, dependi ng upon wi ndow t ype and met hod of oper at i on. Desi gn scr eens t o f i t c l osel y ar ound ent i r e per i met er of vent i l at or or openi ng, t o be r ewi r abl e, easi l y r emovabl e f r om i nsi de bui l di ng, and i nt er changeabl e f or same si ze vent i l at or s of s i mi l ar t ype wi ndows, wi t h mi ni mum of exposed f ast ener s and l at ches. Pr ovi de al l gui des, st ops, c l i ps, bol t s, and scr ews, as necessar y, f or a secur e and i nsect - t i ght at t achment t o wi ndow. Wher e wi cket s ar e necessar y, use sl i di ng or hi nged t ype, wi t h f r i c t i on cat ches, f r amed and t r i mmed f or dur abi l i t y and t i ght f i t . Pr ovi de wi cket openi ng f r ames of s i mi l ar mat er i al and cr oss- sect i on as scr een f r ames. Pr ovi de cont i nuous f r ami ng bar bet ween t he t wo si des of scr een f r ames.

2. 11. 1 Construction

Pr ovi de scr een f r ames of st eel wi t h f i ni sh mat chi ng t hat of wi ndows.

Equi p f r ames wi t h r emovabl e spl i nes of st eel or v i nyl . For m gr oove i n f r ame f or hol di ng scr een cl ot h i n pl ace wi t h noncyl i ndr i cal spl i nes. Make spl i ne and gr oove assembl y so t hat c l ot h cannot be r emoved f r om gr oove by pr essur e on cl ot h. Make spl i nes of such si ze and shape t hat r ot at i on of spl i ne i n gr oove wi l l be pr event ed and spl i ne wi l l t i ght l y hol d c l ot h i n place.

2. 11. 2 I nsect Scr eeni ng

ASTM D3656/ D3656M, Cl ass 2, 18 by 14 mesh, col or gr ay. I nst al l wi t h weave par al l el t o f r ames. St r et ch t i ght f or smoot h appear ance. Conceal edges i n spl i ne channel s.

PART 3 EXECUTI ON

3. 1 INSTALLATION

I nst al l i n accor dance wi t h wi ndow manuf act ur er ' s pr i nt ed i nst r uct i ons and det ai l s. Bui l d i n wi ndows as wor k pr ogr esses or i nst al l wi t hout f or c i ng i nt o pr epar ed wi ndow openi ngs. Set at pr oper el evat i on, l ocat i on, and r eveal ; pl umb, squar e, l evel , and i n al i gnment . Br ace and st ay t o pr event di st or t i on and mi sal i gnment . Pr ot ect vent i l at or s and oper at i ng par t s agai nst di r t and bui l di ng mat er i al s by keepi ng cl osed and l ocked t o f r ame. Bed scr ews or bol t s i n s i l l member s, j oi nt s at mul l i ons, cont act s of wi ndows wi t h s i l l s , bui l t - i n f i ns, and subf r ames i n mast i c seal ant r ecommended by wi ndow manuf act ur er . I nst al l and seal wi ndows i n a manner t hat wi l l pr event ent r ance of wat er and wi nd. Fast en i nsect scr eens secur el y i n pl ace.

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Any mat er i al s t hat show vi sual evi dence of bi ol ogi cal gr owt h due t o t he pr esence of moi st ur e must not be i nst al l ed on t he bui l di ng pr oj ect .

3. 2 ANCHORS AND FASTENI NGS

Make pr ovi s i on f or secur i ng uni t s t o each ot her and t o adj oi ni ng const r uct i on. Desi gn head and j amb member s t o ent er i nt o masonr y not l ess t han 7/ 16 i nch wher e wi ndows ar e i nst al l ed i n di r ect cont act wi t h masonr y. Wher e wi ndows ar e set i n pr epar ed masonr y openi ngs, bui l d i n anchor s and f ast eni ngs t o j ambs of openi ngs and f ast en secur el y t o wi ndows or f r ames and t o adj oi ni ng const r uct i on. Space anchor s not mor e t han 18 i nches apar t on j ambs and si l l s , and i nst al l a mi ni mum of t hr ee anchor s on each si de of each openi ng. Anchor s and f ast eni ngs must have suf f i c i ent st r engt h t o hol d member f i r ml y i n posi t i on. Wher e t ype, s i ze, or spaci ng of anchor s i s not shown or speci f i ed, use expansi on or t oggl e bol t s or scr ews as best sui t ed t o const r uct i on mat er i al . Pr ovi de expansi on shi el d and bol t assembl i es of t ype desi gned t o gi ve hol di ng power beyond t ensi l e and shear i ng st r engt h of bol t . Mi ni mum f ast ener penet r at i on must be not l ess t han t hat r ecommended by manuf act ur er f or t ype f ast ener and wal l mat er i al i nvol ved.

3. 3 OPERATORS

I nst al l oper at or s bef or e gl azi ng. Pl umb and l evel shaf t r i ser s and r uns.

Adj ust vent i l at or s f or f r ee openi ng and t i ght c l osi ng. Secur e housi ngs and adj ust abl e suppor t s t o wal l . Anchor oper at or par t s t o st eel wi ndow mul l i ons wi t h 1/ 2 i nch bol t s. Coupl e i ndi v i dual l engt hs of shaf t i ng wi t h st eel r i vet s or bol t s. Leave mechani cal equi pment and vent i l at or s i n pr oper oper at i ng condi t i on.

3. 4 WEATHERSTRIPPING

Use br onze, spr i ng- br ass, or st ai nl ess st eel and secur e wi t h non- f er r ous scr ews. Secur e weat her st r i ppi ng or r ubbi ng- bl ocks t o par t i ng- st r i p and each end of meet i ng- r ai l s. For sol i d bar st ock wi ndows, use manuf act ur er ' s st andar d weat her st r i ppi ng i nser t ed i nt o gr oove.

3. 5 ADJUSTMENTS AFTER I NSTALLATI ON

Af t er i nst al l at i on of wi ndows and compl et i on of gl azi ng and f i el d pai nt i ng, adj ust al l vent i l at or s and har dwar e t o oper at e smoot hl y and t o pr ovi de weat her t i ght seal i ng when vent i l at or s ar e c l osed and l ocked.

Lubr i cat e har dwar e and oper at i ng par t s. Adj ust weat her st r i ppi ng t o assur e weat her t i ght cont act wi t h f r ames when vent i l at or s ar e c l osed and l ocked.

Weat her st r i ppi ng must not cause bi ndi ng of sash, or pr event c l osi ng and l ocki ng of vent i l at or . Ver i f y pr oduct s ar e pr oper l y i nst al l ed, connect ed, and adj ust ed.

3. 6 CLEANING

Cl ean i nt er i or and ext er i or sur f aces of wi ndow uni t s of mor t ar , pl ast er , pai nt spat t er i ng spot s, and ot her f or ei gn mat t er t o pr esent a neat appear ance and t o pr event f oul i ng of weat her i ng sur f aces and weat her st r i ppi ng, or i nt er f er ence wi t h oper at i on of har dwar e. Cl ean and t ouch up abr aded sur f aces. Repl ace wi t h new wi ndows any st ai ned, di scol or ed, or abr aded wi ndows t hat cannot be r est or ed t o or i gi nal condition.

- - End of Sect i on - -

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