23 05 48.00 40 - VIBRATION CONTROLS FOR HAC PIPING AND EQUIPMENT.pdf

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VI BRATI ON AND SEI SMI C CONTROLS FOR HVAC PI PI NG AND EQUI PMENT

08/ 15

PART 1 GENERAL

Sect i on 23 00 00 AI R SUPPLY, DI STRI BUTI ON, VENTI LATI ON, AND EXHAUST SYSTEMS appl i es t o wor k speci f i ed i n t hi s sect i on t o t he ext ent appl i cabl e.

Sect i on 23 52 00 HEATI NG BOI LERS appl i es t o wor k speci f i ed i n t he sect i on t o t he ext ent appl i cabl e.

Sect i on 23 64 26 CHI LLED WATER PI PI NG SYSTEMS appl i es t o wor k speci f i ed i n t hi s sect i on t o t he ext ent appl i cabl e.

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.

ACOUSTI CAL SOCI ETY OF AMERI CA ( ASA)

ASA S2. 71 ( 1983; R 2006) Gui de t o t he Eval uat i on of Human Exposur e t o Vi br at i on i n Bui l di ngs

AMERI CAN SOCI ETY OF HEATI NG, REFRI GERATI NG AND AI R- CONDI TI ONI NG

ENGI NEERS ( ASHRAE)

ASHRAE HVAC APP I P HDBK ( 2016) HVAC Appl i cat i ons Handbook, I - P Edi t i on

NATI ONAL ENVI RONMENTAL BALANCI NG BUREAU ( NEBB)

NEBB PROCEDURAL STANDARDS ( 2005) Pr ocedur al St andar ds f or TAB ( Test i ng, Adj ust i ng and Bal anci ng) Envi r onment al Syst ems

1. 2 ADMI NI STRATI VE REQUI REMENTS

Submi t equi pment and per f or mance dat a f or v i br at i on i sol at or syst ems as speci f i ed her ei n and i ndi cat ed on t he dr awi ngs i ncl udi ng, wher e appl i cabl e, equi pment base desi gn; i ner t i a- bl ock mass r el at i ve t o suppor t equi pment wei ght ; spr i ng l oads and f r ee, oper at i ng, and sol i d hei ght s of spr i ng;

spr i ng di amet er s; nonmet al l i c i sol at or l oadi ng and def l ect i on; di st ur bi ng f r equency; nat ur al f r equency of mount s; def l ect i on of wor ki ng member ; and ant i c i pat ed amount of physi cal movement at t he r ef er ence poi nt s.

Ensur e t he dat a i ncl udes i nf or mat i on on t he f ol l owi ng wher e appl i cabl e:

a. Mount i ngs

b. Bases

c. I sol at or s

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Addendum #02 09/16/2024

Doolittle, Nicholas J.

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Doolittle, Nicholas J.

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Doolittle, Nicholas J.

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d. Fl oor - Mount ed Pi pi ng

e. Ver t i cal Pi pi ng

Pr i or t o commencement of i nst al l at i on, submi t i nst al l at i on dr awi ngs f or v i br at i on i sol at or syst ems i ncl udi ng equi pment and per f or mance r equi r ement s.

I ndi cat e wi t hi n out l i ne dr awi ngs f or v i br at i on i sol at or syst ems, over al l physi cal f eat ur es, di mensi ons, r at i ngs, ser vi ce r equi r ement s, and wei ght s of equi pment .

1. 3 SUBMI TTALS

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 i nf or mat i on onl y.

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. 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

I nst al l at i on Dr awi ngs; G

Out l i ne Dr awi ngs; G

SD- 03 Pr oduct Dat a

Equi pment and Per f or mance Dat a; G

I sol at or s; G

SD- 06 Test Repor t s

Type of I sol at or ; G

Type of Base; G

Al l owabl e Def l ect i on; G

Measur ed Def l ect i on; G

1. 4 QUALI TY CONTROL

Ensur e al l v i br at i on- cont r ol appar at us i s t he pr oduct of a s i ngl e manuf act ur i ng sour ce, wher e possi bl e. Human exposur e l evel s shoul d be consi der ed usi ng ASA S2. 71 and NEBB PROCEDURAL STANDARDS.

PART 2 PRODUCTS

2. 1 SYSTEM DESCRI PTI ON

Schedul ed i sol at i on mount i ng i s i n i nches and i s a mi ni mum st at i c def l ect i on.

Det er mi ne exact mount i ng s i zes and number of i sol at or s by t he i sol at or manuf act ur er based on equi pment t hat wi l l be i nst al l ed and equi pment l ocat i on. Check equi pment r evol ut i ons per mi nut e ( r pm) and spr i ng

SECTI ON 23 05 48. 00 40 Page 2 def l ect i ons t o ver i f y t hat r esonance cannot occur .

2. 1. 1 Desi gn Requi r ement s

Desi gn f or v i br at i on i sol at i on usi ng ASHRAE HVAC APP I P HDBK, Chapt er 48, as appl i cabl e t o t he f ol l owi ng sect i ons. Al l i sol at or t ypes may not be r equi r ed.

2. 1. 1. 1 Mount i ngs

Pr ovi de t he f ol l owi ng mount i ngs as appl i cabl e and i ndi cat ed on t he dr awi ngs:

Type A: Composi t e pad, wi t h 0. 25- i nch t hi ck el ast omer t op and bot t om l ayer s, mol ded t o cont ai n a pat t er n wi t h nonsl i p char act er i st i cs i n al l hor i zont al di r ect i ons. El ast omer l oadi ng i s not t o exceed 40 pounds per squar e i nch ( psi ) . Ensur e mi ni mum over al l t hi ckness i s 1 i nch. Maxi mum def l ect i ons up t o 0. 25- i nch ar e al l owed.

Type B: Doubl e el ast omer - i n- shear wi t h mol ded- i n st eel r ei nf or cement i n t op and bot t om. Maxi mum def l ect i ons up t o 0. 50- i nch ar e al l owed.

Type C: Fr ee- st andi ng l at er al l y st abl e open- spr i ng t ype f or def l ect i ons over 0. 50- i nch, wi t h bui l t - i n bear i ng and l evel i ng pr ovi s i ons, 0. 25- i nch t hi ck Type A base el ast omer pads, and accessor i es. Ensur e out si de di amet er of each spr i ng i s equal t o or gr eat er t han 0. 9 t i mes t he oper at i ng hei ght of t he spr i ng under r at ed l oad.

Type D: Par t i al l y housed t ype, cont ai ni ng one or mor e ver t i cal l y r est r ai ned spr i ngs wi t h at l east 0. 50- i nch cl ear ance mai nt ai ned ar ound spr i ngs, wi t h adj ust abl e l i mi t st ops, 0. 25- i nch t hi ck Type A base el ast omer pads, and accessor i es.

Type E: Pendul um- suspensi on conf i gur at i on wi t h f r ee- st andi ng st abl e spr i ng wi t h r esi l i ent hor i zont al and ver t i cal r est r ai nt s t o al l ow maxi mum movement s of 0. 25- i nch i n each di r ect i on, 0. 25- i nch t hi ck Type A base el ast omer pads.

Type F: Combi nat i on spr i ng and el ast omer - i n- shear st eel or el ast omer - i n- shear as i ndi cat ed on t he dr awi ngs, f r amed f or hanger - r od mount i ng, wi t h mi ni mum t ot al st at i c def l ect i on of 1- i nch f or combi nat i on spr i ng and el ast omer - i n- shear and 0. 4 i nch f or el ast omer - i n- shear .

2. 1. 1. 2 Bases

Pr ovi de t he f ol l owi ng bases:

Type U: Uni t i sol at or s wi t hout r ai l s, st r uct ur al - st eel bases, or i ner t i a bl ocks.

Type R: Rai l s, connect ed mi l l - r ol l ed st r uct ur al st eel , of suf f i c i ent di mensi on t o pr ecl ude def l ect i on at mi dpoi nt of unsuppor t ed span i n excess of 1/ 1, 440t h of t he span bet ween i sol at or s, power t r ansmi ssi on, component mi sal i gnment , and any over hung wei ght . Wher e Type R bases ar e speci f i ed and t he equi pment pr oposed r equi r es addi t i onal base suppor t , use a Type S base.

Type S: St r uct ur al - st eel bases common t o a suppor t ed assembl y, made

SECTI ON 23 05 48. 00 40 Page 3 f r om wel ded- j oi nt mi l l - r ol l ed st r uct ur al st eel wi t h c l osed- per i met er conf i gur at i on, i sol at or s at t ached t o out r i gger suppor t s.

Ensur e hei ght of st eel member s i s suf f i c i ent t o pr ovi de st i f f ness r equi r ed t o mai nt ai n equi pment manuf act ur er ' s r ecommended al i gnment and dut y ef f i c i ency of power - t r ansmi ssi on component s. Ensur e hei ght of st eel member does not r esul t i n member def l ect i on at mi dpoi nt of unsuppor t ed span of mor e t han 1/ 1, 440t h of t he span bet ween i sol at or s. Mi ni mum hei ght i s 5- i nches.

Type CI B: Pr ovi de concr et e i ner t i a bl ocks common t o t he ent i r e assembl y, wi t h wel ded- j oi nt const r uct i on, mi l l - r ol l ed st r uct ur al - st eel per i met er s, wel ded- i n No. 4 r ei nf or ci ng bar s 8- i nches on cent er each way near t he bot t om of t he bl ock, out r i gger - i sol at or mount i ng pr ovi s i ons, anchor bol t s. Fi l l wi t h 3, 000 psi cur ed- st r engt h concr et e.

Conf i gur e r ect angul ar i ner t i a bases t o accommodat e equi pment suppor t ed.

Ensur e mi ni mum t hi ckness of i ner t i a base, i n addi t i on t o pr ovi di ng sui t abl e mass, i s suf f i c i ent t o pr ovi de st i f f ness t o mai nt ai n equi pment manuf act ur er ' s r ecommended al i gnment and dut y ef f i c i ency of power - t r ansmi ssi on component s, and i s suf f i c i ent t o r esul t i n base def l ect i on at mi dpoi nt of unsuppor t ed span of not mor e t han 1/ 1, 440t h of t he span bet ween i sol at or s. Ver i f y mi ni mum t hi ckness, t he pr ecedi ng r equi r ement s not wi t hst andi ng, i s 8 per cent of t he l ongest base di mensi on.

Ensur e pumps wi t h f l exi bl e coupl i ngs do not have i ner t i a base l ess t han 8- i nches t hi ck, and t he mi ni mum mass of concr et e i ner t i a bl ock i s equal i n wei ght t o suppor t ed equi pment .

2. 1. 1. 3 Pi pe And Duct Vi br at i on I sol at i on

Type G: Pr ovi de i sol at or s wi t h i n- ser i es cont ai ned st eel spr i ngs and pr ef or med f i br ous- gl ass or chl or opr ene- el ast omer el ement s f or connect i ng t o bui l di ng- st r uct ur e at t achment s. Load devi ces by suppor t ed syst em dur i ng oper at i ng condi t i ons t o pr oduce a mi ni mum spr i ng and el ast omer st at i c def l ect i on of 1- i nch and 3/ 8- i nch, r espect i vel y.

Type H: Pr ovi de i sol at or s wi t h cont ai ned chl or opr ene- el ast omer el ement s f or connect i ng t o bui l di ng- st r uct ur e at t achment s. Load devi ces by suppor t ed syst em dur i ng oper at i ng condi t i ons t o pr oduce a mi ni mum el ast omer st at i c def l ect i on of 3/ 8- i nch.

Type J: Pr ovi de i sol at or s wi t h el ast omer s mount ed on f l oor - suppor t ed col umns or di r ect l y on t he f l oor . Load devi ces by suppor t ed syst em dur i ng oper at i ng condi t i ons t o pr oduce a mi ni mum el ast omer st at i c def l ect i on of 3/ 8- i nch.

2. 1. 1. 4 Fl oor - Mount ed Pi pi ng

Type K: Pr ovi de i sol at or s wi t h spr i ngs mount ed on f l oor - suppor t ed col umns or di r ect l y on t he f l oor . Load devi ces by suppor t ed syst em dur i ng oper at i ng condi t i ons t o pr oduce a mi ni mum spr i ng st at i c def l ect i on of 1- i nch.

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2. 1. 1. 5 Ver t i cal Pi pi ng

Type L: Pr ovi de i sol at or s whi ch ar e pi pe base- suppor t devi ces wi t h one or mor e cont ai ned st eel spr i ngs. Load devi ces by suppor t ed syst em dur i ng oper at i ng condi t i ons t o pr oduce a mi ni mum st at i c def l ect i on of 1- i nch. Equi p devi ces wi t h pr ecompr essi on and ver t i cal - l i mi t f eat ur es, as wel l as a mi ni mum 1/ 4- i nch t hi ck el ast omer sound pad and i sol at i on washer s, f or mount i ng t o f l oor .

Type M: Pr ovi de i sol at or s whi ch ar e el ast omer mount ed basepl at e and r i ser pi pe- gui de devi ces, wi t h cont ai ned doubl e act i ng el ast omer el ement s whi ch under r at ed l oad have a mi ni mum st at i c def l ect i on of 3/ 8- i nch. Si ze i sol at or t o accommodat e t her mal i nsul at i on wi t hi n t he st at i onar y gui de r i ng.

2. 2 MATERI ALS

Ensur e r ubber i s nat ur al r ubber and el ast omer i s chl or opr ene. Shor e A dur omet er measur ement of bot h mat er i al s and r ange bet ween 40 and 60.

I nor gani c mat er i al s such as pr ecompr essed, hi gh- densi t y, f i br ous gl ass encased i n a r esi l i ent moi st ur e- i mper vi ous membr ane may be used i n l i eu of speci f i ed nat ur al r ubber and el ast omer s. Wher e t hi s subst i t ut i on i s made, ensur e speci f i ed def l ect i ons ar e modi f i ed by t he manuf act ur i ng sour ce t o accommodat e physi cal char act er i st i cs of i nor gani c mat er i al s and t o pr ovi de equal or bet t er v i br at i on i sol at i on.

Ensur e weat her - exposed met al v i br at i on- i sol at or par t s ar e cor r osi on pr ot ect ed. Chl or opr ene coat spr i ngs.

2. 3 TESTS, I NSPECTI ONS, AND VERI FI CATI ONS

Submi t t est r epor t s f or t est i ng v i br at i on i sol at i on f or each t ype of i sol at or and each t ype of base. Meet r ef er enced st andar ds cont ai ned wi t hi n t hi s sect i on. I ncl ude i n t est r epor t s al l owabl e def l ect i on and measur ed def l ect i on al so meet i ng r ef er enced st andar ds wi t hi n t hi s sect i on.

PART 3 EXECUTI ON

3. 1 I NSTALLATI ON

I nst al l equi pment i n accor dance wi t h manuf act ur er ' s r ecommendat i ons.

Ensur e r ai l s, st r uct ur al st eel bases, and concr et e i ner t i a bl ocks ar e r ai sed not l ess t han 1- i nch above t he f l oor and ar e l evel when equi pment suppor t ed i s under oper at i ng l oad.

Ensur e v i br at i on- i sol at i on i nst al l at i on and def l ect i on t est i ng af t er equi pment st ar t - up i s di r ect ed by a compet ent r epr esent at i ve of t he manuf act ur er .

3. 2 FI ELD QUALI TY CONTROL

3. 2. 1 Test s and Repor t s

Ensur e v i br at i on- i sol at i on devi ces ar e def l ect i on t est ed. Submi t t est r epor t s subst ant i at i ng t hat al l equi pment has been i sol at ed as speci f i ed

SECTI ON 23 05 48. 00 40 Page 5 and t hat mi ni mum speci f i ed def l ect i ons have been met . Make al l measur ement s i n t he pr esence of t he Cont r act i ng Of f i cer .

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