Ur­bana Town­ship de­signed by Ar. Stephen Coates and Ar. Su­bir Joshi

Kolkata, which has un­der­gone sig­nif­i­cant in­fras­truc­tural changes in re­cent years, has got a world-class town­ship with Ur­bana, a stim­u­lat­ing com­bi­na­tion of eclec­tic thought, struc­tural dy­namism, and in­ter­na­tional pa­ram­e­ters

MGS Architecture - - Front Page -

Ur­bana, a metic­u­lously planned project, is the first ever tallest res­i­den­tial com­plex in east­ern In­dia. Soar­ing at a height of 171 me­ters with seven tow­ers com­pris­ing 40 to 45 floors of lux­ury apart­ments, du­plex and pent­houses, and bun­ga­lows and sprawl­ing farm­lands, it is Kolkata’s only mega project spread across 66 acres in the heart of the city. It is de­fined by mag­nif­i­cent high-rise ed­i­fices with de­signer land­scape along with best-in-class life­style and recre­ational and sports fa­cil­i­ties, and is set amidst lush green­ery, wide open spa­ces and or­ga­nized land­scaped ar­eas.

Struc­tural De­sign

The struc­tural de­sign of Ur­bana has been done by us­ing a 3-D ‘fi­nite-el­e­ment’ com­puter pro­gram called ETABS to en­sure max­i­mum struc­tural in­tegrity. Us­ing an ad­vanced tech­nol­ogy known as dy­namic anal­y­sis, the tow­ers have been tested to with­stand earth­quakes. Ex­treme Wind Tun­nel test­ing has also been con­ducted by CPP, Texas, to en­sure that the tow­ers can re­sist in­tense wind forces.

The de­sign adopts a shear core wall sys­tem to re­sist lat­eral and grav­ity loads. The ver­ti­cal or grav­ity loads are pro­posed to be car­ried by a re-en­forced con­crete sys­tem of a flat plate with edge beam, in ad­di­tion to a shear wall sys­tem. Floor di­aphragms are de­signed to trans­mit loads hor­i­zon­tally so that tor­sional loads gen­er­ated due to dy­namic wind and seis­mic ef­fects are re­sisted ef­fec­tively. The en­tire sewage gen­er­ated will be treated through a sewage treat­ment plant. The treated water shall then be used for gar­den­ing, car wash, AC chiller plants, com­mer­cial build­ing toi­let flush­ing and water bod­ies.

Cred­its

Ar­chi­tect: Stephen Coates, Prin­ci­pal Ar­chi­tect, Sin­ga­pore As­so­ci­ate Ar­chi­tect: Su­bir Basu, Kolkata Struc­tural Con­sul­tant: Pre­drag Eror, Dubai Land­scape De­sign Con­sul­tant: Boon­chai Sakultham­rak, Green Ar­chi­tects, Thai­land Engi­neer­ing firm: Larsen & Toubro

A ded­i­cated un­der­ground net­work for col­lec­tion and stor­age of roof rain water will be im­ple­mented, in ad­di­tion to ground water recharge per­co­la­tion pits at ap­pro­pri­ate lo­ca­tions. In­no­va­tive solid waste col­lec­tion sys­tems and pro­cesses will be in­tro­duced. The refuse from res­i­den­tial tow­ers will be dis­posed through a garbage chute to a vol­ume con­trolled hop­per at the bot­tom of the build­ing. All re­use from the town­ship will be sucked into the garbage col­lec­tion truck by us­ing a pneu­matic sys­tem and dis­posed to KMC land­fill area.

Stephen Coates, Prin­ci­pal Ar­chi­tect, Ur­bana,

is a prom­i­nent name in the field of ar­chi­tec­ture. Ear­lier a di­rec­tor at LPT Ar­chi­tects Ltd (now Aedas HK Ltd) he formed his de­sign com­pany acta In­ter­na­tional in part­ner­ship with Kevin Tan. acta is in­volved in var­i­ous pri­vate and com­mer­cial projects world­wide. Th­ese in­clude the 40-storey Res­i­den­tial Tower For­tune in Bei­jing; Prince’s Build­ing, Cen­tral Hong Kong (home to ma­jor re­tail­ers, and Min­istry of De­fense, Bris­tol that has 20 build­ings ar­ranged around a beau­ti­ful is­land wa­ter­way.

Su­bir Basu, As­so­ci­ate Ar­chi­tect, Ur­bana,

is as­so­ci­ated with al­most all Joint Sec­tor Com­pa­nies formed be­tween pri­vate de­vel­op­ers and the West Bengal Gov­ern­ment. He was also one of the mem­bers of the High Power Com­mit­tee that laid down the build­ing rules for the Kolkata Mu­nic­i­pal Cor­po­ra­tion.

Sus­tain­abil­ity

The Build­ing En­ve­lope and Sys­tem has been de­signed to max­i­mize en­ergy per­for­mance. About 90% of the area gets nat­u­ral light­ing dur­ing Equinox (noon time of March and Septem­ber) with re­quired lux level in clear sky con­di­tion. The Poros­ity through high-rise tow­ers al­lows for nat­u­ral ven­ti­la­tion through­out the site.

Vari­able Re­frig­er­ant Vol­ume (VRV) AC sys­tems in ev­ery apart­ment and bun­ga­low will en­able sav­ings of 20-30% en­ergy com­pared to con­ven­tional air con­di­tion­ing. Ven­ti­la­tion for the base­ment park­ing fa­cil­i­ties will be con­trolled by sen­sor op­er­ated jet fans for im­proved ef­fi­ciency and en­ergy sav­ing. By us­ing pre­cast fa­cades for the tow­ers, the elec­tric­ity con­sump­tion will re­duce by upto 15%. Mo­tion sen­sors in apart­ment lift lob­bies and stair­cases will sub­stan­tially re­duce the elec­tric­ity con­sump­tion as well.

Con­struc­tion

Ad­vanced con­struc­tion meth­ods and tech­nol­ogy such as ar­chi­tec­tural pre­cast façade, alu­minium shut­ter­ing sys­tem, self-com­pact­ing con­crete, build­ing ver­ti­cal­ity sur­vey, bi-di­rec­tional pile load test, tem­per­a­ture map­ping of mass con­crete in rafts, wind and water pres­sure test of full size sam­ple win­dow sim­u­lat­ing the ac­tual wind pres­sure con­di­tion at fac­tory, use of low smoke zero halo­gen (LSZH) wires, test­ing of elec­tri­cal ca­bles and wires, etc. en­sure qual­ity con­struc­tion and timely com­ple­tion of jobs.

A project of this mag­ni­tude also de­mands ex­per­tise far be­yond the scope of or­di­nary con­struc­tion com­pa­nies, which is why engi­neer­ing gi­ant L&T was roped in. En­gi­neers and tech­ni­cians over­see even the small­est cast­ing or set­ting work, mak­ing sure that qual­ity checks and de­sign in­tegrity are al­ways in place.

A full-fledged on-site qual­ity lab has also been set up with the Bengal Engi­neer­ing Col­lege as third party. This not only en­sures ex­pert ad­vice at hand but also that all con­struc­tion ma­te­rial such as ag­gre­gates, ce­ment, steel, con­crete, bricks, and tiles are tested be­fore con­struc­tion be­gins. All test­ing so far has been done by var­i­ous in­de­pen­dent third-party ac­cred­i­ta­tions like BESU, EFRAC, and the In­dian Ply­wood In­dus­tries Re­search & Train­ing In­sti­tute.

Ur­bana, the largest lux­ury con­do­minium in Kolkata is de­signed by in­ter­na­tion­ally ac­claimed ar­chi­tects and the project is un­der the guid­ance of Larsen & Toubro, In­dia’s lead­ing engi­neer­ing firm

Ur­bana, tow­er­ing over East­ern Met­ro­pol­i­tan by­pass, in progress since 2010, is the first fu­tur­is­tic lux­ury com­mu­nity in the city that has trans­formed Kolkata’s sky­line

Ur­bana has been con­cep­tu­al­ized and planned by six stal­warts of the Real Es­tate in­dus­try, namely, the Shrachi Group, Emami Group, Sureka Group, MKJ Group, JB Group, and Na­hata Group, in as­so­ci­a­tion with the Gov­ern­ment of West Bengal.

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