07 72 20.pdf

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

SECTI ON 07 72 20

GRAVI TY- TYPE ROOF VENTI LATORS

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.

AMERI CAN SOCI ETY OF CI VI L ENGI NEERS ( ASCE)

ASCE 7 ( 2010; Er r at a 2011; Supp 1 2013) Mi ni mum Desi gn Loads f or Bui l di ngs and Ot her Structures

ASTM I NTERNATI ONAL ( ASTM)

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 B209 ( 2014) St andar d Speci f i cat i on f or Al umi num and Al umi num- Al l oy Sheet and Pl at e

ASTM B209M ( 2014) St andar d Speci f i cat i on f or Al umi num and Al umi num- Al l oy Sheet and Pl at e ( Met r i c)

ASTM B221 ( 2014) St andar d Speci f i cat i on f or Al umi num and Al umi num- Al l oy Ext r uded Bar s, Rods, Wi r e, Pr of i l es, and Tubes

ASTM B221M ( 2013) St andar d Speci f i cat i on f or Al umi num and Al umi num- Al l oy Ext r uded Bar s, Rods, Wi r e, Pr of i l es, and Tubes ( Met r i c)

SHEET METAL AND AI R CONDI TI ONI NG CONTRACTORS' NATI ONAL ASSOCI ATI ON

(SMACNA)

SMACNA 1793 ( 2012) Ar chi t ect ur al Sheet Met al Manual , 7t h Edi t i on

1. 2 DESI GN REQUI REMENTS

Desi gn vent i l at or s f or use wi t h t he speci f i c t ype of pr oj ect r oof i ng syst em, and t o pr ovi de uni f or m and cont i nuous ai r f l ow. Vent i l at or desi gn shal l pr ovi de pr ot ect i on agai nst r ai n and snow, and shal l be pr ovi ded wi t h a cont i nuous weep al ong t he bot t om of bot h s i des of wi nd band. Uni t s shal l be sel f - c l eani ng by t he act i on of t he el ement s, and shal l have pr ovi s i ons f or car r y i ng wat er and nor mal wi nd- t r anspor t ed soi l mat t er t o t he out si de. Desi gn uni t s f or wi ndspeeds of not l ess t han 80 mph i n accor dance wi t h ASCE 7. Vent i l at or s shal l be f r ee of i nt er nal obst r uct i ons or movi ng par t s whi ch wi l l r equi r e mai nt enance, and shal l be

Apr i l 2019 Page 1 SECTI ON 07 72 20 compl et e wi t h t ype of mount i ng i ndi cat ed on dr awi ngs.

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 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

Roof Vent i l at or s; G

1. 4 QUALI TY ASSURANCE

Manuf act ur er shal l speci al i ze i n desi gn and manuf act ur e of t he t ype of r oof vent i l at or s speci f i ed i n t hi s sect i on, and shal l have a mi ni mum of 5 year s of document ed successf ul exper i ence. Pr ovi de a vent i l at or i nst al l er exper i enced i n t he i nst al l at i on of vent i l at or t ypes speci f i ed.

1. 5 DELI VERY, STORAGE, AND HANDLI NG

Roof vent i l at or s shal l be car t oned or cr at ed pr i or t o shi pment . Pr ot ect vent i l at or s f r om moi st ur e and damage. Remove damaged i t ems f r om t he si t e.

PART 2 PRODUCTS

2. 1 MATERIALS

2. 1. 1 Al umi num Ext r usi ons

Al umi num ext r usi ons shal l be al l oy 6063, t emper T5 i n compl i ance wi t h

ASTM B221.

2. 1. 2 Al umi num Sheet s

Al umi num sheet s shal l be al l oy 5005, t emper H15 or al l oy 3003, t emper H14 i n compl i ance wi t h ASTM B209.

2. 1. 3 Gal vani zed St eel Sheet s

St eel sheet s shal l be commer ci al qual i t y, z i nc- coat ed st eel ( hot - di p gal vani zed) of qual i t y est abl i shed by ASTM A653/ A653M, mi ni mum G90 coat i ng thickness.

2. 2 RI DGE VENTI LATORS

Pr ovi de r oof r i dge vent i l at or s f abr i cat ed of gal vani zed st eel or al umi num ( as i ndi cat ed) , and assembl ed t o any desi r ed l engt h. Cont i nuous- r un r i dge vent i l at or s shal l be connect ed wi t h spl i ce pl at es of t ype whi ch wi l l t el escope t oget her and not r equi r e f ast ener s, sol der i ng or wel di ng.

Pr ovi de vent i l at or s wi t h manual l y- oper at ed si ngl e- l eaf damper s compl et e wi t h accessor i es t o meet desi gn and per f or mance r equi r ement s; or a UL l abel ed f i r e- act uat ed damper syst em compl et e wi t h accessor i es t o meet bui l di ng code r equi r ement s. Damper s and ai r shaf t s shal l be compl et e wi t h ur et hane gasket i ng f or ext r a- t i ght encl osur es. Pr ovi de met al c l osur e st r i ps, whi ch mat ch t he panel r oof r i b cont our s, t o c l ose out weat her and pr ovi de a secur e seat f or vent i l at or s. I nsect or Bi r d scr eens shal l be provided.

Apr i l 2019 Page 2 SECTI ON 07 72 20

2. 3 STATI ONARY VENTI LATORS

Pr ovi de st at i onar y r oof vent i l at or s f abr i cat ed of gal vani zed st eel or al umi num wi t h seaml ess spun coni cal - shaped weat her cap, and havi ng st r ai ght - t hr ough dr ai nage f or el i mi nat i ng t he possi bi l i t y of ai r - bor ne debr i s col l ect i ng i n t he vent i l at or openi ngs. I nsect or Bi r d scr eens shal l be pr ovi ded.

2. 4 TURBI NE VENTI LATORS

Pr ovi de t ur bi ne vent i l at or s f abr i cat ed of gal vani zed st eel or al umi num, cor r ugat ed or f l at sheet s, compl et e wi t h sensi t i ve bal l - bear i ng act i on t o enabl e t he s l i ght est mot i on of ai r t o move t he r ot or head wher e suct i on i s mai nt ai ned at l ow wi nd vel oci t i es. Vent i l at or s shal l have 360 degr ee oper at i ng sur f ace t o assur e access of wi nd cur r ent s r egar dl ess of wi nd vel oci t i es. Rot or head shal l be anchor ed t o pr event head f r om l i f t i ng or j umpi ng of f t he r ot or i n hi gh wi nds. Rot or cr own pl at e shal l be seaml ess. Bi r d or I nsect scr eens shal l be pr ovi ded.

2. 4. 1 Dampers

Tur bi ne vent i l at or s shal l be pr ovi ded wi t h damper s manual l y- oper at ed wi t h di r ect pul l - chai n or r ack and pi ni on; push- but t on cont r ol el ect r i c gear mot or - oper at ed damper s; or t her most at cont r ol el ect r i c gear mot or - oper at ed damper s ( as i ndi cat ed i n dr awi ngs) .

2. 4. 2 Rot or Shaf t

Rot or shaf t bear i ngs shal l be ent i r el y shi el ded i n cor r osi on- r esi st ant al umi num casi ng. Bear i ngs shal l be pr e- l ubr i cat ed and shal l have l i f e- t i me war r ant y. Bear i ngs shal l be at t op and bot t om t o assur e accur at e al i gnment . Shaf t and bear i ngs shal l be easi l y r epl aceabl e as a uni t . Rot or col l ar shal l be r ol l ed and wel ded.

2. 5 FABRICATION

Vent i l at or s shal l be f abr i cat ed i n accor dance wi t h appr oved shop dr awi ngs. Wel ds, sol der ed seams, r i vet s and f ast ener s shal l be c l ean, secur e, wat er t i ght , and smoot h. Edges shal l be wi r ed or beaded, wher e necessar y, t o ensur e r i gi di t y. Joi nt s bet ween sect i ons shal l be wat er t i ght and shal l al l ow f or expansi on and cont r act i on. Gal vani c act i on bet ween di f f er ent met al s i n di r ect cont act shal l be pr event ed by nonconduct i ve separ at or s.

2. 6 CURB BASES

Vent i l at or bases f or cur b- mount ed i nst al l at i ons shal l be of s i ze i ndi cat ed on dr awi ngs, and shal l be desi gned speci f i cal l y f or t he t ype of vent i l at or and r oof i ng syst em appr oved f or t hi s pr oj ect . Cur b bases shal l be f act or y- f or med and f l ashed f or a wat er t i ght i nst al l at i on. Cur b bases shal l be f abr i cat ed of mat er i al and f i ni sh t o mat ch t he vent i l at or .

2. 7 SCREENS

Scr eens shal l be f ur ni shed by vent i l at or manuf act ur er as par t of vent i l at or assembl y. Scr een ( wi t h f r ames) shal l be manuf act ur ed of mat er i al t o mat ch vent i l at or s, and shal l be desi gned t o be easi l y r emoved f or c l eani ng pur poses.

Apr i l 2019 Page 3 SECTI ON 07 72 20

2. 8 FINISH

2. 8. 1 Gal vani zed St eel Fi ni sh

Gal vani zed st eel r oof vent i l at or s shal l be f act or y- coat ed wi t h r ust - r esi st ant pr i mer and baked- on f i ni sh coat s of acr yl i c .

2. 8. 2 Al umi num Fi ni sh

Al umi num r oof vent i l at or s shal l be f act or y- f i ni shed t o mat ch met al r oof f i ni sh and col or .

2. 8. 3 Color

Col or shal l be i n accor dance wi t h Sect i on 09 06 00 SCHEDULES FOR FI NI SHES .

PART 3 EXECUTI ON

3. 1 PREPARATION

Pr epar e r ough openi ngs and ot her r oof condi t i ons i n accor dance wi t h appr oved shop dr awi ngs and manuf act ur er ' s r ecommendat i ons. Rough openi ngs shal l be f i el d- measur ed and r ecor ded on shop dr awi ngs pr i or t o f abr i cat i on of r oof vent i l at or s. Bef or e st ar t i ng t he vent i l at or wor k, pr ot ect sur r oundi ng r oof sur f aces f r om damage. Coor di nat e f abr i cat i on wi t h const r uct i on schedul e. Submi t di mensi oned dr awi ngs i ndi cat i ng l ocat i on of each t ype of vent i l at or i ncl udi ng det ai l s of const r uct i on, gauges of met al , and met hods of oper at i on of damper s and cont r ol s.

3. 2 INSTALLATION

Coor di nat e r oof vent i l at or i nst al l at i on wi t h r oof i ng wor k, and i n accor dance wi t h appr oved shop dr awi ngs, manuf act ur er ' s publ i shed i nst r uct i ons, and chapt er 8 of SMACNA 1793. The vent i l at or i nst al l at i on shal l be wat er t i ght and f r ee of v i br at i on noi se. Pr ot ect al umi num sur f aces f r om di r ect cont act wi t h i ncompat i bl e mat er i al s. Al umi num sur f aces whi ch wi l l be i n cont act wi t h seal ant shal l not be coat ed wi t h a pr ot ect i ve mat er i al . Al umi num shal l not be used wi t h copper or wi t h wat er whi ch f l ows over copper sur f aces. Cl ean r oof vent i l at or s i n accor dance wi t h vent i l at or manuf act ur er ' s r ecommendat i ons.

3. 3 PROTECTION

Pr ot ect exposed vent i l at or f i ni sh sur f aces agai nst t he accumul at i on of pai nt , gr i me, mast i c, di sf i gur ement , di scol or at i on and damage f or dur at i on of const r uct i on act i v i t i es.

- - End of Sect i on - -

Apr i l 2019 Page 4 SECTI ON 07 72 20