26 05 48.00 10.pdf
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Summary: TAFB Technical Specifications 2019 – Seismic Protection for Electrical Equipment
This is a technical specification document (Section 26 05 48.00 10) issued by Tinker Air Force Base, Oklahoma, dated April 2019, establishing requirements for seismic protection of electrical equipment and systems. The specification applies to various electrical components including control panels, switchgear, transformers, motor control centers, light fixtures, unit substations, pumps with motors, air handling units, engine-generators, switchboards, storage racks, and solar heating units. The document references industry standards including AISC 325 (2011), ASTM E580/E580M (2014), UFC 3-310-04 (2013), and UL 1598 (2008), which contractors must comply with when designing and installing seismic protection measures.
Key requirements include: contractors must submit detailed design calculations stamped and signed by registered professional engineers demonstrating that structural members can withstand seismic loads calculated per UFC 3-310-04; seismic restraints may be omitted from electrical conduit smaller than 2-1/2 inches trade size unless otherwise required; rigidly mounted equipment such as engine-generators, substations, transformers, and motor control centers must be located entirely on one side of building expansion joints with flexible connections for conduit crossing joints; lighting fixtures must comply with UL 1598 standards and UFC 3-310-04 requirements; and recessed fluorescent fixtures not exceeding 56 pounds may be attached directly to ceiling system runners using seismically designed fastening. All submittals, including shop drawings, product data, and contractor-designed bracing, require government approval before implementation.
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Ti nker AFB, OK TAFB Techni cal Spr ci f i cat i ons 2019
SECTI ON 26 05 48. 00 10
SEI SMI C PROTECTI ON FOR ELECTRI CAL EQUI PMENT
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.
AMERI CAN I NSTI TUTE OF STEEL CONSTRUCTI ON ( AI SC)
AI SC 325 ( 2011) St eel Const r uct i on Manual
ASTM I NTERNATI ONAL ( ASTM)
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
U. S. DEPARTMENT OF DEFENSE ( DOD)
UFC 3- 310- 04 ( 2013) Sei smi c Desi gn f or Bui l di ngs
UNDERWRI TERS LABORATORI ES ( UL)
UL 1598 ( 2008; Repr i nt Oct 2012) Lumi nai r es
1. 2 SYSTEM DESCRI PTI ON
1. 2. 1 Gener al Requi r ement s
The r equi r ement s f or sei smi c pr ot ect i on measur es descr i bed i n t hi s sect i on shal l be appl i ed t o t he el ect r i cal equi pment and syst ems l i s t ed bel ow.
St r uct ur al r equi r ement s shal l be i n accor dance wi t h Sect i on 13 48 00
SEI SMI C PROTECTI ON FOR MI SCELLANEOUS EQUI PMENT.
1. 2. 2 El ect r i cal Equi pment
El ect r i cal equi pment shal l i ncl ude t he f ol l owi ng i t ems t o t he ext ent r equi r ed on t he dr awi ngs or i n ot her sect i ons of t hese speci f i cat i ons:
Cont r ol Panel s Ai r Handl i ng Uni t s
Pumps wi t h Mot or s Switchgear
Li ght Fi xt ur es Uni t Subst at i ons
Mot or Cont r ol Cent er s Transformers
Apr i l 2019 Page 1 SECTI ON 26 05 48. 00 10
Swi t chboar ds ( Fl oor Mount ed) St or age Racks
Sol ar Heat i ng Uni t s
1. 2. 3 El ect r i cal Syst ems
El ect r i cal syst ems shal l be i nst al l ed as r equi r ed on t he dr awi ngs and ot her sect i ons of t hese speci f i cat i ons and shal l be sei smi cal l y pr ot ect ed i n accor dance wi t h t hi s speci f i cat i on.
1. 2. 4 Cont r act or Desi gned Br aci ng
Submi t copi es of t he Desi gn Cal cul at i ons wi t h t he Dr awi ngs. Cal cul at i ons shal l be appr oved, cer t i f i ed, st amped and si gned by a Regi st er ed Pr of essi onal Engi neer . Cal cul at i ons shal l ver i f y t he capabi l i t y of st r uct ur al member s t o whi ch br aci ng i s at t ached f or car r y i ng t he l oad f r om t he br ace. Desi gn t he br aci ng i n accor dance wi t h UFC 3- 310- 04 and addi t i onal dat a f ur ni shed by t he Cont r act i ng Of f i cer . Resi st ance t o l at er al f or ces i nduced by ear t hquakes shal l be accompl i shed wi t hout consi der at i on of f r i c t i on r esul t i ng f r om gr avi t y l oads. UFC 3- 310- 04 uses par amet er s f or t he bui l di ng, not f or t he equi pment i n t he bui l di ng;
t her ef or e, cor r espondi ng adj ust ment s t o t he f or mul as shal l be r equi r ed.
Loadi ngs det er mi ned usi ng UFC 3- 310- 04 ar e based on st r engt h desi gn;
therefore, AI SC 325 shal l be used f or t he desi gn.
1. 2. 5 Condui t s Requi r i ng No Speci al Sei smi c Rest r ai nt s
Sei smi c r est r ai nt s may be omi t t ed f r om el ect r i cal condui t l ess t han 2- 1/ 2 i nches t r ade si ze, unl ess such r est r ai nt s woul d be necessar y t o meet t he r equi r ement s of UFC 4- 010- 01. Al l ot her i nt er i or condui t , shal l be sei smi cal l y pr ot ect ed as speci f i ed.
1. 3 EQUI PMENT REQUI REMENTS
Submi t det ai l dr awi ngs al ong wi t h cat al og cut s, t empl at es, and er ect i on and i nst al l at i on det ai l s, as appr opr i at e, f or t he i t ems l i s t ed.
Submi t t al s shal l be compl et e i n det ai l , i ndi cat i ng t hi ckness, t ype, gr ade, c l ass of met al , and di mensi ons; and shal l show const r uct i on det ai l s, r ei nf or cement , anchor age, and i nst al l at i on wi t h r el at i on t o t he bui l di ng const r uct i on. Submi t copi es of t he desi gn cal cul at i ons wi t h t he det ai l dr awi ngs. Cal cul at i ons shal l be st amped by a r egi st er ed engi neer and shal l ver i f y t he capabi l i t y of st r uct ur al member s t o whi ch br aci ng i s at t ached f or car r y i ng t he l oad f r om t he br ace.
1. 3. 1 Ri gi dl y Mount ed Equi pment
The f ol l owi ng speci f i c i t ems of equi pment t o be f ur ni shed under t hi s cont r act shal l be const r uct ed and assembl ed t o wi t hst and t he sei smi c f or ces speci f i ed i n UFC 3- 310- 04. Each i t em of r i gi d el ect r i cal equi pment shal l be ent i r el y l ocat ed and r i gi dl y at t ached on one si de onl y of a bui l di ng expansi on j oi nt . Pi pi ng, el ect r i cal condui t , et c. , whi ch cr oss t he expansi on j oi nt shal l be pr ovi ded wi t h f l exi bl e j oi nt s t hat ar e capabl e of accommodat i ng di spl acement s equal t o t he f ul l wi dt h of t he j oi nt i n bot h or t hogonal di r ect i ons.
Engine-Generators Substations
Apr i l 2019 Page 2 SECTI ON 26 05 48. 00 10
Transformers Swi t ch Boar ds and Swi t ch Gear s Mot or Cont r ol Cent er s Fr ee St andi ng El ect r i c Mot or s
1. 3. 2 Nonr i gi d or Fl exi bl y- Mount ed Equi pment
Equi pment , ot her t han t he i t ems speci f i ed above, shal l be const r uct ed and assembl ed t o r esi st a hor i zont al l at er al f or ces based on t he oper at i ng wei ght of t he equi pment at t he ver t i cal cent er of gr avi t y of t he equi pment .
Lat er al f or ces shal l be comput ed based on t he r equi r ement s of TI 809- 04 and UFC 4- 010- 01.
1. 4 SUBMITTALS
Gover nment appr oval i s r equi r ed f or al l submi t t al s. 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
Li ght i ng Fi xt ur es i n Bui l di ngs Equi pment Requi r ement s
SD- 03 Pr oduct Dat a
Li ght i ng Fi xt ur es i n Bui l di ngs Equi pment Requi r ement s Cont r act or Desi gned Br aci ng
PART 2 PRODUCTS
2. 1 LI GHTI NG FI XTURE SUPPORTS
Li ght i ng f i x t ur es and suppor t s shal l conf or m t o UL 1598.
2. 2 SWAY BRACI NG MATERI ALS
Sway br aci ng mat er i al s ( e. g. r ods, pl at es, r ope, angl es, et c. ) shal l be as speci f i ed i n Sect i on 13 48 00 SEI SMI C PROTECTI ON FOR MI SCELLANEOUS
EQUIPMENT.
PART 3 EXECUTI ON
3. 1 SWAY BRACES FOR CONDUI T
Condui t shal l be br aced as f or an equi val ent wei ght pi pe i n accor dance wi t h Sect i on 13 48 00 SEI SMI C PROTECTI ON FOR MI SCELLANEOUS EQUI PMENT.
3. 2 LI GHTI NG FI XTURES I N BUI LDI NGS
Li ght i ng f i x t ur es and suppor t s shal l conf or m t o t he f ol l owi ng:
3. 2. 1 Pendant Fi xt ur es
Pendant f i x t ur es shal l conf or m t o t he r equi r ement s of UFC 3- 310- 04.
Apr i l 2019 Page 3 SECTI ON 26 05 48. 00 10
3. 2. 2 Cei l i ng At t ached Fi xt ur es
3. 2. 2. 1 Recessed Fl uor escent Fi xt ur es
Recessed f l uor escent i ndi v i dual or cont i nuous- r ow mount ed f i xt ur es shal l be suppor t ed by a sei smi c- r esi st ant suspended cei l i ng suppor t syst em bui l t i n accor dance wi t h Sect i on 09 51 00 ACOUSTI CAL CEI LI NGS. Sei smi c pr ot ect i on f or t he f i x t ur es shal l conf or m t o t he r equi r ement s of UFC 3- 310- 04. Recessed l i ght i ng f i x t ur es not over 56 pounds i n wei ght may be suppor t ed by and at t ached di r ect l y t o t he cei l i ng syst em r unner s usi ng scr ews or bol t s, number and si ze as r equi r ed by t he sei smi c desi gn.
Fi xt ur e accessor i es, i ncl udi ng l ouver s, di f f user s, and l enses shal l have l ock or scr ew at t achment s.
3. 2. 2. 2 Sur f ace- Mount ed Fl uor escent Fi xt ur es
Sur f ace- mount ed f l uor escent i ndi v i dual or cont i nuous- r ow f i xt ur es shal l be at t ached t o a sei smi c- r esi st ant cei l i ng suppor t syst em bui l t i n accor dance wi t h Sect i on 09 51 00 ACOUSTI CAL CEI LI NGS. Sei smi c pr ot ect i on f or t he f i x t ur es shal l conf or m t o t he r equi r ement s of UFC 3- 310- 04.
3. 2. 3 Assembl y Mount ed on Out l et Box
A suppor t i ng assembl y, t hat i s i nt ended t o be mount ed on an out l et box, shal l be desi gned t o accommodat e mount i ng f eat ur es on 4 i nch boxes, pl ast er r i ngs, and f i xt ur e st uds.
3. 2. 4 Wal l - Mount ed Emer gency Li ght Uni t
At t achment s f or wal l - mount ed emer gency l i ght uni t s shal l be desi gned and secur ed f or t he wor st expect ed sei smi c di st ur bance at t he s i t e.
3. 2. 5 Lat er al For ce
St r uct ur al r equi r ement s f or l i ght f i x t ur e br aci ng shal l be i n accor dance wi t h Sect i on 13 48 00 SEI SMI C PROTECTI ON FOR MI SCELLANEOUS EQUI PMENT.
- - End of Sect i on - -
Apr i l 2019 Page 4 SECTI ON 26 05 48. 00 10
File details come from the government source that posted it. Updated .