Alice Tully Hall and the Juilliard School 3 4 Tension Exertedbythestainless for Ittoresist Theamountof the Challengetostructure Is Senior Structuralengineerfor Used

Left Alice Tully Hall’s new face exposes the lobby, and Juilliard’s new ﬂoors, to Broadway.

The warp and weft of a cantilevered steel addition hits a high note for audiences and performers.

ALTHOUGH IT IS ONE OF THE most often used venues in Lincoln Center, Alice Tully Hall hadn’t had a renovation since its opening night in 1969. And though The Juilliard School surrounding it had never faltered in its ability to develop world-famous performing artists, it was in much need of a makeover that would add practice rooms, classrooms, and office spaces. The long-overdue redesign, undertaken by Diller Scofidio + Renfro in collaboration with FXFowle Architects in 2003 and to be completed this year, strips away the opaque facade at the base of Pietro Belluschi’s original scheme, revealing the entrance lobby and Juilliard’s inner workings to the street. The dramatic physical, and symbolic, gesture was made possible by Arup’s structural engineers, who developed a 50-foot steel truss cantilever that serves the dual purpose of creating a soaring entrance to Alice Tully Hall while expanding the school’s practice space overhead. Like the pieces performed there, the project was complex and multilayered. A tight urban site is adjacent to the subway, and a schedule accelerated to meet performance and academic Alice Tully Hall and year deadlines—even as the school remained fully operational during construction—presented significant challenges. Despite The Juilliard School these, the new space is marked by a transparent, column-free lobby created by a unique geometry of intersecting tilted planes defined

2 Metals in Construction Spring 2010 Alice Tully Hall and The Juilliard School 3 4 tension exertedbythestainless for ittoresist theamountof the challengetostructure is senior structuralengineerfor used. minimize the number of fittings and large single-glazedpanels pretensioned cablewallsystem lobby curtainwall,aone-way transitions. For cables, fittings,andcomponent by minimizingthevisibilityof that give the building transparency designed two curtain wall systems C and philosophicalchange T beckons visitorsinside. creating awelcomingspacethat shape reaches toward Broadway, design meetings. FXFowle, oftheteam’s initial charge oftheproject for Sylvia Smith,seniorpartnerin volumes ofthebuilding,”says gesture, inthespiritofbig “We talkedaboutdoingabig line, and a sloped and tilted soffit. elevations, its Broadway property by thebuilding’s northandsouth enter wished for, the architects o achieve the dramatic visual A ccording to A lice T he resulting M T att ully’s L

arson, L incoln

rup, turns the corner on65 thecorner turns the lobbycolumns. foundation wall spanning between cables isresisted bythe loads. requirements under high pretension strength andstringentdeflection T span between the lobby columns. G between a pair of stiff heads of the cables are anchored resist theupliftatbase. load attheheadisusedto lobby columns;thecumulative converted tocompression inthe the tensionincablewallis at theheadandbaseofwall, bending of the structural elements to atennisracquet. loop structural system analogous T sensitive tobuildingmovements. steel cablesbecausetheyare of lobbyvolume,thestructure the expansion. vertically with the sloping soffit of the main structural line and drops the facademigratesawayfrom he W24membersmeetboth he rade 50 wide-flange beams that Where thelobbycurtainwall A rup teamutilizedaclosed A t thebase,uplifton I mmediately south T hrough A th Street, S

A he 992

goal wastonothaveanyvisible jewel box.”Forthissection,the in Smith’s words, “anilluminated washed with lights at night creating, spaces duringtheday, andis natural light to the Juilliard School cantilevered portionprovides east elevationofthebuilding’s a hungglass-ﬁnwallonthe A a single piece. fabricate the entire assembly as M structural steelerector/fabricator cable attachmentsledthe construction tolerancesatthe C members intheexpansion. existing buildingframeandto to reinforced membersinthe transferred intorsionbythepipe Bending intheoutriggersis diameter by1-inch-thickpipe. off of W14x132 outriggers that cantilever utilized a system of of abackspan. to the support without the beneﬁt are asmuch12 feeteccentric must supportfacadecablesthat hallenging weldsandstringent etropolitan-Walters toshop bove thethree-story lobby, A S TM

A 53 T G he engineers rade B 24-inch A 992 G rade 50

1 30-inch box-shapedgirder with wall systemishungfrom a the entire 48-foot-highcurtain looking out. high transparency foroccupants exterior fittings,butalsotohave metal spliceconnections. the visualdisruptionoftypical glass splicingwasusedtoavoid limitations forfinlength,glass-to- extrusions, and due to fabrication silicone glazedaluminum load to the glass fins via structural clips at vertical joints transfer wind concealed rods. glazing edgefrom hittingthe T section to2mmper5-footbay. deflection of the hollow structural was abletolimitthedifferential of thecantilevered trusses), beams that cantilever from the end points (theboxbeamsitson doubly cantilevered support spanning asmuch67feetto loads hanging from above. Despite glass unitstopickupthedead are concealedbetweeninsulating alloy stainlesssteeltensionrods Metals inConstruction his wasrequired toprevent the 5 ⁄ 8 x12-inch flanges.Special T o achievethislook, C oncealed glazing S pring 2010 A rup

Previous spread and this spread: Iwan Baan structure to maintain ceiling heights. were carefully woven around the (and thusquieter) air, but ducts larger tocontainslower-moving element. Duct sizes also hadtobe facade istheonlyexposed brace diagonal bracealongthesouthern west) in the expansion structure; the (one north to south and two east to line and with three braced frames the easternmost existing column infilling north-to-south bracing in expansion was achieved by thick. the building’s beauty, butits I reinforcing plates up to 3 with wide-flange columnswere plated existing buildings,where existing interface betweenthenewand column strengthening atthe T recording, andperformance. sensitive spacesforrehearsal, heavy acousticceilingsinsound- concrete toppingslabs,and partitions, isolatedacoustic support solid driven higherbytheneedto framework. Steeltonnagewas another determinedthebuilding’s isolated acousticallyfrom one performance spacesthatwere design goal,theneedforideal gesture wastheoutward A clearances. as minimalarchitecturalfinish audio-visual infrastructure as well lighting, electrical,high-tech mechanical distribution,theater to meetneedsfordense custom shop-built steel assemblies tightly control thegeometryof frame building,theteamcould new spaceandtheoriginalsteel- simplifying connectionsbetween the sameheight. elevations were notalwaysat existing structure, whose expansion extendingfrom the in whichtheycreated afour-story technically demandingprogram and engineerstodealwiththe design enabledthearchitects columns. lobby space with only three visible creates a large, unobstructed four stories on a single truss and span that supports as many as for a 75-foot unsupported back exterior plazaspaces,andalso to theproperty line,preserving allow forthe50-footcantilever brains andbrawn. attests toequalendowmentsof 275-ton systemofsteeltrusses he increased loads also required ts curtainwallsmayexpose lthough creating a welcoming A T S he lateral system for the TM M

A oreover, thesteel 572 CM I U acoustic G n additionto T rade 50

he trusses 3

⁄ 4 inches

and practice rooms for the school. the for rooms practice and space ofﬁce expanding to addition in lobby three-story soaring the creates Facing Alice Tully HallandTheJuilliard School A 50-foot steel truss cantilever cantilever truss steel 50-foot A

cantilever movementsoverhead. resisting while ﬁttings of number minimum a uses system wall cable Above The one-way pretensioned pretensioned one-way The

5 6 the 100,000-square-foot structure. The building’s unique steel “warp weave so many varied spaces into and weft” allowed the architects to

equipment, andlargeductwork. theater electrical material, acoustical accommodating while loads building’s the bear to kinked are members steel which throughout offices, and rooms practice small with interwoven are L building. steel-frame original the and building new the between connections Above arge rehearsal and performance spaces spaces performance and rehearsal arge S teel framing simplified simplified framing teel

to thepublic. gesture welcoming a create to meant is form, elongated new its with structure, Facing Metals inConstruction The 100,000-square-foot 100,000-square-foot The S pring 2010

FXFowle Architects

Iwan Baan changes andrampsallowthese N and multipleceilingplanelevels. theater lightinggrid,catwalks, metal assemblieslikethe located tofitwithmiscellaneous to maximizeusable space. plates or using welded connections clearance byadjustinggusset coordination withthearchitectural were designed in very tight I and diagonalsizesofW14x730. sections withmaximumchord fabricated from W14 wideflange through thestory-talltrusses, in specificareas toallowpassage room. the double-heightjazzrehearsal height blackboxtheater, and by thedancestudio,adouble- modate the larger spaces required Juilliard Schoolspacetoaccom- on varying floors of the cantilevered smaller offices and practice rooms n selectareas, steelconnections umerous steel and slab elevation Steel members also had to be Seven trusses are positioned in T russ chords were kinked

new imageofits future. C through its levels, honoring members, riseanddescend students, performers and audience come aliveasteachersand resembles apageofsheetmusic the transparent buildingalmost brightly littableau.Seenatnight, detached Belluschi design with a structure, replacing the somewhat into the100,000-square-foot to weavesomanyvariedspaces weft” thatenabledthearchitects building’s unique steel “warp and A throughout theexpansion. and performancefloorbuild-ups accommodate variousacoustic floor elevations,aswellto existing building’s floor-to- larger spacestomeshwiththe enter’s historywhilecreating a ccording toSmith,itisthe M

L incoln

Curtain Wall Fabricatorand MetalFabricatorand Ornamental Miscellaneous S Curtain Wall Consultant: General Contractor: Miscellaneous Metals Mechanical S Architects: L ALI Alice Tully HallandTheJuilliard School ocation: tructural tructural Metal Teck, Inc. Post RoadIron Works, Inc. Post RoadIron Works, Inc. Metropolitan Walters, LLC in collaborationwith C E TULLY HALL AND THE THE AND HALL TULLY E 1 S E 941 Broadway, NewYork, NY Diller Scofidio+Renfro ngineer: teel Fabricatorand E ngineer: I ron Fabricatorand , Bensalem, PA Arup Turner Construction Company E Arup FXFOWLE Architects ngineer: R.A. Heintges&Associates , New York, NY , E New York, NY rector: , , , E New York, NY Anastos EngineeringAssociates Greenwich, CT Greenwich, CT rector: E E rector: rector: , W&W Glass J New York, NY UILLIARD S

, New York, NY ; , Nanuet, NY ,

C , , New York, NY HOOL New York, NY , New York, NY 7