Article on 'Thermal Bridging: Building Envelope' by Chaitanya Raj Goyal

7/28/2019 Article on 'Thermal Bridging: Building Envelope' by Chaitanya Raj Goyal

1/5

:57 P h l I j s t l rd u c o ` lr ) Ijy 45:4 www.ijstlrduco`lr.ak.cn

Qtl l o Qtruaturl s Phlrijo Drc`bcnb

a o ci j tl a h jn b l. I u ah k g t h cs l nl rb y c s

j a a k un t l ` g k r c n t h l s p j a l h lj t c n b j n à kk oc nb / j n` gk ri s t hl ar ux kg t hl

prkdol i*

Q t l lo c s j g u o o y r l a ya o j d ol i j t l rc j o

j n ` p rk d j do y t h l ik s t rl a y a ol ` c n t h l

w kr o . K w cn b t k s u ah p r kp l rt c ls kg c t /

l j a h t k n k g r l a ya o l ` s t l lo s jv l s 4 / < 55

p k u n s k g c r k n k r l j n ` j p p r kx c i j tl o y

: / 55 5 p k un ` s k g a k jo . I ks t s t ll o u t co c zl `

c n t hl a kn st ru at ck n k g s tl lo d uc o cn bs

a k n sc s t s k g 2 5 , r la y a o l` a k n t l nt ) c n

gjat/thl Brl ln Duco cnb Tl skural Buc`l

n l r by l g g ca c l n ay c s d l ak i c n b jn

cnarljscnboy cipkrtjnt pjrjiltlr

Lcn thl `l scbn kg duco`cnbs. Jiknbt h l ij n y a h j n bc n b t rl n ` s/ j s j rl s u o tk g t h l b rl l n r lv k ou t ck n / c s t h l br k wc n b

p kp uo jr ct y j n` `l ij n` kg l nl rb y

l ggcacl nt jn sustjcnjdol duco`cnbs

whcahhjv l nkwdl akil thl hkttl sttrl n`

k g t h l ` l aj ` l. P h l l nl r by a k ns u il `

d y s tr ua tu rl s j aa ku nt s g kr j oj rb l

p r kp k rt c kn k g t h l tk t jo b o kd j o ln l rb y

a k n s u i p t c k n / j n ` k g t h l a j r d k n

`ckxc`l l icssckns whcah akntrcdutl tk

bcv l s stl l o grjicnb cts hcbhl st < cakn

rjtcnb ijmcnb ct j trul brl l n prkùat.Jpprkprcjtl oy prkv c`l cnsuojtckn cn

s tl lo ak ns tr ua tc kn a jn s ud st jn tc jo o y

s j vl n j tu r jo r ls k ur a ls / l n lr b y j n `

i k n ly. \ n g kr t u n jt l o y/ s t l lo d l c n b 1 5 5

tcil s ikrl thl rijooy aknùatcv l thjn

w k k` r l s u ot s c n s h k rt a c r a u c t th l r ij o

drc`bcnb thrkubh stllo grjicnb ilidlrs.

Dut wcth thl akntcnukus drl jmthrkubhs

c n t h l c n su o jt c kn t l ah n ko k by c t h j s n kw

dlakil pksscdol tk kvlrakil suah

shkrt akicnbs. Pk`jy/ dl ajusl kg pudoca

P hl ri jo D rc `b cn b6T l` ua cn b Q tr ua tu rj o Q tl lo s C ip ja t k nD uc o` c nb L nv lo k pl L nl rb y P r j ns gl r

P hl ri jo D rc `b cn b6T l` ua cn b Q tr ua tu rj o Q tl lo s C ip ja t k nD uc o` cn b L nv lo kp l L nl rb y P r j ns gl r

Ahjct jnyj Tjf BkyjoAhjct jnyj Tjf Bkyjo

U h ktk Aku r tlsy6 w w w .r w ijr tc naknstr u atc kn. aki


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:52www.ijstlrduco`lr.ak.cn P h l I j s t lr d u c o l r ) Ijy 45:4


` c s p r k p k r t c k n j t l o y s c b n c g c a j n t h l j t

o k ss .$ G k r l x ji p ol / c t i j y k a au r w h ln j

aknùatcv l duco`cnb akipknl nt/ suah

js j stl l o ocntl o/ spjns thl bjp dl twl l n

t h l c n sc ` l j n ` k ut s c ` l kg j d u c o ` c nb /

d y p j s s c n b t h l c n s u o j t c k n . P h l r i j oDrc`bcnb ol j`s tk thl rijo okssl s grki

thl duco`cnb cnarl jscnb AK l icssckns4g r ki t h l d u c o ` cn b . A kn ` ln s jt c kn i j y

j o sk k a au r k n t h l cn t lr n jo w j oo w h lr l

thl rl cs j thl rijo drc`bl ol j`cnb tk

`jijbl tk thl cntl rnjo `l akrjtckn.

C ns uo jt ck n s tj n` jr `s g kr r kk gs / w jo os /

w c n ` kw s jn ` g ok k r s c n t h l D u c o c n b

T l b uo j t c kn s h j v l c n ar l j sl ` k v lr t h l

yl jrs tk ciprkv l l ggcacl nay dy rl ùacnb

h l j t o ks s . C n ` c jn Q t j n `j r ` a k` l 1 2 34 )

:328 slrvls js thl buc l kg hljt cnsuojtckng k r n k n c n ` u st r c j o d u co ` c n b s c n C n ` c j.

Q c na l l n lr b y a k st s a j n d l h c bh /

h jv cn b t hl ri jo d rc `b cn b k aa ur c n j

i l t jo d u c o ` c n b a j n d l l x p ln s c vl j n `

a k st p rk h cd c tc v l. R h co l lg g kr t s c n t h cs

j rl j j rl ty pc aj oo y g ka us l` kn t hl

i l ah j n ca j o / l o la t r ca j o j n ` b o jz c n b

systl is jn nkt thl struaturjo systl i/

k n l j r l j w h lr l s t ru a tu r jo ` l sc b nl rs a j n

r l ` ua l l n l r by a k n su i p t ck n c s t h l o k s s

k g d u c o ` cn b l n l rb y v c j t h l ri j o a k n ù a )

t c vc t y k g l o li l nt s t hj t dr c `b l j a rk s s

t h l c n s u o jt c k n k g j w jo o k r r k k g l n a o ks u r l

k g j a k n ` c t c kn l ` ( c . l. / h l j t l` k r a k k o l` #

spjal whl n thl kutsc`l tl ipl rjturl cs

wjrilr kr ako`lr thjn thl cntlrckr

s p j al . T l ` ua c n b t hl s l d r c ` bl s h js

d l a ki l k g p j r j ik u n t c i pk r t j na l t k

us tk`jy* Gkrtunjtl oy/ rl v lrscnb thl rijo

drc`bcnb cs pksscdol .

P hl ri jo D rc `b cn b t hr ku bh s tr ua tu rj o

s t l l o 6 H kw c t w k r m s ;

C n t hl l jr oy : 33 5s / w hl n t hl s tl lo

c n ù s tr y i j `l j s t rk n b po j y t k d rc n bocbht)bjubl stl l o grjicnb tk rl sc`l ntcjo

aknstruatckn/ ct wjs ilt/ un`lrstjn jdoy/

d y s t r kn b r l s c st j n a l g rk i t h l o u i d lr

i j nu g ja t ur l rs / g r ji c nb t r j ` ls j n `

trj`ctckn) krcl ntl hkil duco`l rs whk

wlrl aknal rnl` jdkut pl rgkrijnal jn`

w jr r jn t y. J t t hl t c il / k n l k g t h l ik s t

a k ii k no y l x pr l ss l ` ak n al rn s d y

struaturjo l nbcnl l rs `l djtcnb thl cssul

wjs thl prkdol i kg thl rijo drc`bcnb.Qtruaturjo stl lo l ol il nts jrl cntl brjo

t k t h l du c o ` c n b l n v lo k p l kr d u c o c n b

l naoksurl. Jaakr cnboy/ `l scbnl rs nl l `

t k hj vl j dj sc a m nk wo l` bl kg h kw

l nv l okpl s wkrm/ l spl acjooy thl thl rijo

c i p j at k g s t l lo l o l i l nt s p l n l tr j t c nb

t h l l n vl o kp l . J s l vl r yk n l m n kw s/ s t ll o

c s j p r lt t y b k k` a k n` u at k r k g h l jt . C t s

T ) v jo u l c s c n a r l` c d o y o k w/ j n ` w h c o l c t

h j s t r j c t c k nj o o y d l l n d l o c lv l ` t h j t t h l

j r l j kg j w j o o k r a l c o c nb d r c ` bl ` d y s t l lo

cs sk sijoo thjt thl kv l rjoo okss kg hl jt cs

r lo jt c vl oy i cn kr/ r la ln t rl sl jr ah h js

s h kw n t h jt " s n k t t r ul g kr l c th l r k g o c bh t )

bjubl stll o grjicnb kr struaturjo stll o

grjicnb.Jaakr`cnb tk knl skural / cg thl

d rc `b cn b k g s tl lo c n j w jo o c s l qu jo t k o ls s

t h jn k n l) t ln t h k r : p lr a ln t kg t h l t k tj o

w j o o j rl j / c t w c o o j o o kw i k r l hl j t t k g o kw

t h r k ub h t h j t s i jo o s u r g ja l j r l j t hj n

t h l l nt c rl r ls t kg t h l w j oo . T ls l jr a h

aknalrns rlbjr cnb lnvcrknilntjo cssuls

j s w lo o j s l vl r c na rl js cn b l nl rb y a k st s /s t u ` cl s s h k w t h j t a k n su i l rs h jv l

dl akil wcoocnb jn prl pjrl tk l nsurl

t h j t t h lc r s t l lo d u c o ` c nb s j r l l n lr b y)

l ggcacl nt.

@ lgcn cnb j Phlri jo Drc `bl jn` thl

j s s k a cj t l ` p r k d o l i s

P h lr i jo d rc ` bc n b k a au r s/ w hl n

h l j t g o k w t h j t ka a u r s ja r k ss i k rl

aknùatcv l akipknl nts cn jn kthlrwcsl

w l oo ) c ns u o jt l ` js s li d oy/ r l su o t s cn

J n cng rjrl` th lri jo ci jb l kg j stllo)g rji l` drcam

du co`cnb rlvljos h ljt okss jt th l drcb h t ylookw ocnls

akrrlspkn`cnb tk th l okajtckns kg th l rloclvcnb jnb ols.

Rcn`kw stllo g rji l jats js j th lri jo drc`b l


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:58 P h l I j s t l rd u c o ` lr ) Ijy 45:4 www.ijstlrduco`lr.ak.cn

cnstctutckns okkml jt thl rijo drc`bcnb

c n o c b h t) b j u bl s t l lo g r j i cn b j n ` ` c s)

akv l rl thl thl rijo drc`bcnb thrkubh

s t ll o g rj i cn b a jn r l `u a l j wj o o s

thl rijo pl rgkrijnal dy


4/5

Ijaicoojn CnsuojtcknsCn`cj Uvt. Ot`.


5/5

c n s u oj t l ` s h lj t h c nb = ` l s cb n j n ` c n s t jo o

` c s t jn a l s p j a lr s th j t p o j a l j n j c r

d j rr c lr d l tw ll n t h l g r ji c nb j n` t hl

l xt lr ck r s hl jt hc nb = j `` j r lg ol at c vlsurgjal tk thl spjal sk thl jcr djrrcl r

h j s j n c n ar l js l ` T ) vj o ul = j o tl r nj t l

grjicnb il idl rs tk prkv c`l j drl jm

jn`sprjygkjikn thl grjicnb il idlrs.

U lr h j p s t h l qu c a m ls t / s c i p ol s t jn `

l j s c l s t w j y t k c i p r k v l t h l r i j o

p l r gk r i jn a l k g w j o o s jn ` a l c o c nb s j t

t h l i k st a k s t )l g g la t c v l pr c a l a j n d l

j a h c lv l ` w c t h a k n t cn u k u s c n s u oj t c k n

p r k` u at s / t y pc a jo o y w c th r c bc ` g k ji kr j

a k id c nj t ck n p r k u at / s u ah j s c n su o jt l `

il tjo pjnl os.

J``ctckn kg spjal grjicnb cs jnkthl r

l ggl atcv l skoutckn. Ikst il tjo duco`cnbs

j r l a k n st r u a t l` w ct h d j t t c n s u oj t c k n

`rjpl kv l r thl grjicnb il idl rs/ jn`

t h ln i lt j o p j nl o s j t tj a hl ` . P h l p j nl o s

a k i pr l s s t h l c n su o j t ck n / r l ` ua c n b c t s

l gg l at c vl nl s s j n ` t h l g j st l nl r s p r kv c `l

j shkrt aut tk thl thl rijo drc`bl . Akn)

sl qul ntoy/ j wjoo `lscbnl tk jahcl v l

j n T ): 3 v jo ul aj n h jv l j n l gg la tc vl

v j o ul k g T ) : 0 . U o j a c nb j t h lr i j o do k a m

k n t h l g r ji c nb i li dl r p rc kr t k c ns tj oo cn b

p jn lo s jo okws t hl wj oo t k rl tjc n c ts g uo o

rjtcnb jn` prl vl nt thl shkrt aut ajusl `

d y g j s t ln l r s.

I kc s tu r l jo k nb w c th t h l ln l rb yshkuo josk dl tjml n bkk ajrl kg. Knl

k g t h l d c bb l s t `j n b lr s t k j ny d u c o ` cn b

c s t h l p kt l n t cj o g k r i k c st u r l d uc o ` ) u p

w c th c n t h l w j oo s . P h l ` l gc n cn b gj a tk r c s

` l w p k cn t / w h ca h c s t h l t li p lr j tu r l j t

whcah wjtl r v jpkr akn l nsls. Phlrl jrl

t wk w jy s t k p rl vl nt t hc s. K nl c s t k c ns tj oo

l n k ub h c n s u oj t c k n s k t h j t t hl ` l w p k c n t

kaaurs kutsc`l thl wjoo jn thl kthl r cs

tk usl v jpkr djrrcl rs thjt prl v l nt thl

i k c st u r l c n t h l wj r i jc r g r k i p j s sc n b

cntk thl wjoo. Dkth jrl nl alssjry.

A kn t cn u ku s c n su o jt c kn w c th g j ac n b

ijtl rcjo cs j aknv l ncl nt jn l jsy wjy

t k a k n st r u a t j v jp k r d j r rc l r/ p r l vl n t j

t h lr i jo d r c `b l ( jn k th l r w j y t k b lt j

` l w p k c n t c n s c ` l j w j oo # j n ` j ` ` l n ku b h

T)v joul sk thl duco`cnb l nv l okpl wkrms

lggcaclntoy.

Cnsuojtckn gjacnb jn` rj cjnt djrrclrs

j o sk ` l ij n ` s p la c jo j t tl n tc k n. G ja c nb s

akil cn `cggl rl nt v jrcl tcl s wcth `cggl rl nt

j ` vj n tj b ls . G kc o g j ac n b/ g k r l x ji p ol /

wcoo hlop rl ùal hl jt aknùatcv cty. Mrjgt

p j p lr g j a c nb c s a k i ik n o y u s l ` gk r d j t t

cnsuojtckn jn wkrms wl oo gkr cnarl jscnb

t h l p l r i l j d c o c t y r j t c n b k n v j p k r

c n gc o t rj t ck n . P h l c i pk r tj n al kg g j ac n b

l xtl n`s dl ykn fust ikcsturl akntrko

jn hl jt aknùatcv cty. Ul rhjps knl kgthl gjacnbs thjt cs bl ttcnb thl ikst

j t t ln t c k n c n a k n t cn u k u s c n s u o jt c k n c s gk c o

g j ac n b/ w h ca h c s u s l` j s j r j c j nt d j rr c lr/

prl kicnjntoy cn akko rkkgjppocajtckns.

Tj`cjnt djrrcl rs jrl nl al ssjry

p r ci j rc o y c n h k t a o ci j tl s w hl r l ` cr l at

sunocbht strcml s j surgjal jn hl jts ct. J

r j c j nt d j rr c lr r l u a ls t h l h l jt t r jn s gl r

j n ` c s jg g la t l` d y t h rl l gj a tk r s6

l i c ss c v ct y/ r l g o la t c v ct y j n ` t h l j nb o l k g

t h l s u r g ja l . Q t u ` cl s h j v l s h k wn t h j t

r j ` c jn t d jr r c lr s a jn r l ` u al a kk o c n ba k s ts d lt w l ln < ) :5 p lr a l nt c n w j r i

a o ci j tl s . C n a k ko a o c ij t ls / c t i j ml s i k rl

sl nsl tk cnarljsl thl ol v l o kg cnsuojtckn

rjthl r thjn cnstjoocnb j rj`cjnt djrrcl r.

Olsskns Oljrnl`

C n j `` ct ck n t k th l su st jc nj dc oc ty

c i pj a t k g t h l u s l k g s t ru a tu r jo s tl lo

i j tl rc j o c t sl o g/ t h l s t ll o ` l sc b n j n `

a k n st r u a tc k n a k i iu n c t y i u s t j a m n kw )

o l `b l t h l n l l t k i c nc i cz l t h l p k tl n tc j o

d uc o c nb l nl rb y t hj t a jn d l o ks t t hr ku bh

thl rijo stl l o drc`bcnb. Phcs ahjnbl cs

akicnb qucamoy. Rl nl l tk `l vl okp

j n` r lg cn l j s lt k g s ko u tc kn s n kw/ d lg kr l

k u r k p tc k ns jr l o c ic t l` dy k t hl rs . R l

shkuo`nt wjct untco duco`cnb ak`l s jrl

c n tr k u a l` c n t h cs a k un t ry c n a kr p kr j tc n b

s p la c gc a o c ic t jt c kn s g kr t h l ji k un t k g

thl rijo stl l o drc`bcnb thjt wcoo dl

jookwl cn duco`cnbs `l pl n`cnb kn thl cr

usl . Phl Cntl rnjtcknjo Brl l n Aknstrua)

t ck n A k` l ( CB AA #/ j pr k` ua t k g t hl

Cntl rnjtcknjo Ak`l Akunaco/ wjs pudoc)

shl` rlalntoy cn Ijrah 45:4. Phl

C B AA s tj tl s t hj t t hl du co c nb t hl ri jo

l nv lokpl shjoo l xal l rl qucrl il nts cn

thl Cntl rnjtcknjo Lnl rby Aknsl rv jtckn

Ak`l (CLAA# dy :5,.C n t k `j y s i j rm l t/ r l ù a cn b d kt h

a k n s tr u a t c kn j n ` k p l r jt c k n jo d u c o ` c n b

a k s t j r l i k r l c i p kr t j n t t h j n l v l r

dl gkrl . Cts tcil gkr struaturjo l nbcnl l rs

t k u n ` l r s t j n ` t h c s p r k d o l i j n `

` l vl o kp s ko u tc k ns . J g tl r j o o/ t h jt s w h j t

l nbcnl l rcnb cs joo jdkut*

::5 P h l I j s t l rd u c o ` lr ) Ijy 45:4 www.ijstlrduco`lr.ak.cn

Akntrkoocnb kdvcku s th lri jo drc`b ls cs i u st


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Article on 'Thermal Bridging: Building Envelope' by Chaitanya Raj Goyal