Edward
April 28th, 2003, 10:02 PM
http://www.andante.com/article/article.cfm?id=20448
andante - 3 April 2003
http://www.andante.com/images/Articles/11zankelhallrendering200.jpg
New York's Carnegie Hall unveiled its third auditorium, the mid-sized, subterranean Zankel Hall, at a press conference on Wednesday. The 644-seat space, complementing Carnegie's 268-seat Weill Recital Hall and 2,904-seat Stern Auditorium, opens in September with a wide-ranging two-week festival.
"Our house of music has a new wing," said executive and artistic director Robert Harth.
A sycamore-lined "shoebox" placed within elliptical walls, Zankel's most prominent feature is its flexibility. A series of lifts enables the floor to be arranged in several configurations, with stages of various sizes and locations (the rows of seats are moved on air casters); a moveable ceiling allows for a range of lighting and theatrical equipment.
The first year of programming at the hall reflects its adaptability, with semi-staged events from the Kronos Quartet and cabaret star Audra McDonald. But perhaps as importantly, the moldable hall seems to have inspired an eclectic approach to programming, with new music, world music, pop, folk, cabaret, and jazz appearing nearly as often as traditional classical repertoire. "Great music comes in many forms and sizes," Harth said. "We wanted Zankel to have its own identity but we wanted the identity to be within the mantle of Carnegie Hall."
That identity is introduced in a two-week festival that begins on 12 September with a concert of 20th-century and contemporary music led by composer/conductor John Adams. Other festival performers include Cuban pianist Omar Sosa, cellist Yo-Yo Ma, jazz musicians Kenny Barron and Dianne Reeves, actress Anna Deavere Smith, Pierre Boulez' Ensemble Intercontemporain, and James Levine and the Met Chamber Ensemble. There is no opening gala, Harth emphasized, in order to encourage the widest possible audience to visit the hall.
The diverse programming continues through the 2003–04 season, with chamber music and recitals mingling with world music and cabaret. Jazz fans angered by the disbanding of the Carnegie Hall Jazz Band in 2002 will be pleased to find a four-concert jazz series produced in collaboration with George Wein's Festival Productions. Carnegie Hall's previously announced "Perspectives" artists for the season — pianists Mitsuko Uchida and Emanuel Ax, conductor Michael Tilson Thomas and soprano Dawn Upshaw — will bring parts of their series to Zankel, as will a just-announced fifth "Perspectives" curator — Brazilian singer/songwriter Caetano Veloso. Adams, who takes up the Debs Composer's Chair at Carnegie Hall in September, hosts a three-part interview series in Zankel as well as assisting with the hall's educational and other programming.
With the addition of a third performing space, Harth pointed out, Carnegie Hall is returning to its original configuration. When the hall opened in 1891, there was a lower-level Recital Hall underneath the main auditorium (in fact, Harth noted, Carnegie's first performance, by pianist Arthur Friedheim, took place there). But conversions of the space for various uses over the years (its most recent incarnation was the Carnegie Hall Cinema) left it unusable for music. Four years of construction — including the removal of 6,300 cubic yards of bedrock — have restored the third hall, albeit in an expanded and updated form.
"By realizing Andrew Carnegie's original vision of three very different musical stages under one roof," Harth said, "we are embracing and expanding upon Carnegie Hall's unique history."
http://newyork.construction.com/NYCN/NYmay2002/cover
May2002.html
New York Construction News - Cover Story
Worker Harmony 'Composes'
Facility Under Carnegie Hall
By David S. Chartock
It may not be Beethoven's Fifth, but the noise beneath Carnegie Hall is a well-orchestrated composition being played by construction workers whose instruments have included backhoes, hoe rams, drills, flat jacks, hydraulic jacks and hammers.
When completed, their composition will be known as Judy and Arthur Zankel Hall. Until its completion, work has been progressing since 1999 in a confined space that had to literally be carved out, requiring the removal of nearly 7,000 cu. yds. of rock.
To create a $70.5 million, 41,000-sq.-ft., three-level, multipurpose performance and education space with a 20,000-sq.-ft. footprint beneath Carnegie Hall's Isaac Stern Auditorium was no easy task.
"It's like building a ship in a bottle," said Nancy Czesak, vice president and project executive for Tishman Construction Corp, the project's New York-based construction manager.
"We are constrained by the rock below ground, the lack of access above ground and the three-dimensional perspective of this unique space," she added.
It also required a lowering of a floor by 24-ft. for the existing space, that was demolished, installation of a temporary shoring system and construction of a new concrete structure, added Tishman Construction's Chairman John L. Tishman.
The Excavation
To create the space necessary for an intermediate-sized facility, 7,000 cu. yds. of Manhattan Schist was excavated from beneath the landmark building, explained Richard Malenka, director of administration for Carnegie Hall Corp. Inc., the project's New York City-based owner.
Schiavone Construction Inc. of Secaucus, N.J., did the excavation and foundation work as well as the structural metal framing and concrete and masonry work. The firm also performed the specialized tunneling work required for this project.
"It was very complicated as to how they staged their work into the site. There was a great deal of innovation with regard to how we would use a tunneling contractor. John Tishman challenged the team to think out of the box by suggesting logistic impediments that needed to be taken into account, such as the subway tunnels. He viewed this as a mining operation and kept encouraging us to carefully review the capabilities of our contractors so that the right contractor would do the right job," said Czesak, who is also Tishman's project manager for Zankel Hall.
Schiavone brought experience and skill to the job to accomplish its task. They brought the proper equipment and the ability to modify that equipment for changing underground site conditions, she noted.
Anthony DelVescovo, a project manager with Schiavone Construction said, "our end of the project included the demolition of the existing building underground, rock excavation and providing temporary support for the existing building below ground.
"We excavated up to 35 ft. deep to rock. Before that, we had to perform some structural demolition to remove existing walls and concrete slabs. There were 750 cu. yds. of brick removed," DelVescovo explained.
In order to take the brick out," he continued, temporary steel supports had to be installed. Sometimes we had to needle the supports through existing brick walls. These needle beams were picked up by header beams, which in turn were picked up by the shoring towers.
There were other areas that had to be underpinned, including the existing stage. To do this, DelVescovo said, underpinning panels were installed under the existing brick wall for the main hall. Existing cast iron columns also had to be extended by temporarily supporting the columns so the rock below them could be excavated. Then, rock was excavated up to 16 ft. deep and new concrete piers were installed to lower the footings. In addition, two 80-ft.-long, W36x393 steel beams were placed above a brick wall to support the brick wall so the brick wall below it could be demolished.
The main hall seating area, he noted, also had to be supported. "This was done by drilling caissons 30 ft. below the excavation line and then installing 12 columns that supported the structure above. We also installed header beams above these columns to pick up the existing girders for the main hall. We had to transfer loads using flat jacks and hydraulic jacks."
Tunneling
Tunneling was also challenging. In order to tunnel, Schiavone had to install an elevator in order to transport its machinery down to the site.
"We had a 12-ft.-wide by 9-ft.-high hole in the exterior of the existing building at the sidewalk level. Then we installed a 20-ton hydraulic elevator that was custom made for this project. We brought in all of our equipment, including hoe rams, drills, excavators, loaders, Bobcat loaders and an air track drill," DelVescovo explained.
Excavation began after all of the temporary shoring was done. Then 7,000 cu. yds. of rock was removed using different methods of rock removal, including hoe rams and some chemicals to expand mortar so the rock would crack, he added.
"We also used limited, controlled blasting and a lot of it. About 1,500 cu. yds. was taken out by hand using small drills, sinking hammers and jack legs. Hydraulic splitters were also used. All of the rock was taken out in 4 cu. yd. boxes using forklifts." DelVescovo noted.
"Installation of structural steel for permanent support of the building was next. The two 80-ft. beams were a part of this. All of the beams were set using chain falls and come alongs," DelVescovo explained, noting, "we had 400,000 lbs. of structural steel that was moved in through that small opening and then assembled below. We had about 30 columns to remove as well."
"Everything was dependent on each other," he continued. "After the excavation was done, the steel was in place and the temporary shoring was removed, we installed our concrete walls and slabs."
DelVescovo said there are three different slab levels: the pit level, the parterre level and the mezzanine level. "We had to drill 72 caissons into the pit level so screw jacks could be installed to support the stage," he added.
Structural Design
"The entire structural design involved shoring up the existing structure to allow for rock removal and then building a new structural support system that consisted of an elliptical, sloping, reinforced concrete wall 30 ft. high and 100 ft. long," noted Alastair Elliott, a senior engineer with Robert Silman Associates, the project's New York-based structural engineer.
The 12-in.-thick, elliptical 5,000 psi concrete wall is sloped at a 7-degree angle for acoustical and structural purposes. In order to pour the wall, shoring columns first had to be used to shore up the existing beams, explained Dan Ekus, Tishman's project superintendent. When the foundations for the wall were poured, the load was transferred from the shoring beams to the wall. This, he noted, required two weeks of intense coordination.
One of the project's structural challenges was its proximity to the N and R subway lines, which required approval from the Metropolitan Transportation Authority/New York City Transit, Elliott said.
"We were 9 ft. from the tracks at the closest point and we had to demonstrate that normal subway line operations would not be impacted by our work. With all of the rock removal, we had to establish a rock-monitoring program that consisted of seismic monitors to detect vibration. We also worked closely with URS, the project's New York-based geotechnical engineer, monitoring the rock removal process and providing assistance regarding placement of rock anchors to Schiavone Construction," Elliott added.
Other Structural Challenges
Other structural challenges required the "predeflection of all of the transfer steel to ensure that there would be no movement of the main hall floor and stage above," Elliott said, noting that A36 steel was used along with connections to cast iron columns throughout the original lower level structure. We could not weld the steel connections because of the cast iron columns. Instead, all of the cast iron column connections had to be rebolted or drilled and tapped. This was time-consuming because of the time it takes to drill through cast iron.
"Every square foot, vertically and horizontally, is different. For example," Czesak said, "architectural and structural details on one side of the project differ from the other side. This space is unique and does not exist anywhere else."
Flexible Space
This unique space was specifically designed to be flexible, Tishman added. To make it flexible required a system of lifts and chair wagons to allow the configuration of the space to be changed to meet different performance needs. Chair wagons hold 24 seats and are moved on casters to provide a quick and easy method for configuring space based on the type of performance.
The basic design is a rectangular auditorium inside the elliptical shell. It features an auditorium floor that will be on a series of lifts in order to enable the auditorium to be configured from traditional and stage seating to a center stage or flat floor facility. The end stage can be three different sizes as a result of the lifts, Carnegie Hall's Malenka explained.
Continuing, Malenka said there are two different center stage configurations as well. One is symmetrical and the other is asymmetrical. There are also two flat floor configurations; one is slightly lower than the other, which relates to capacity. In the facility's maximum configuration, which will be the smallest end stage and largest audience, there will be 650 seats.
Primary Configurations
The three primary configurations, according to Joe Fleischer, partner in charge, The Polshek Partnership, the project's New York-based architect, include: the end stage configuration in which people in the audience can focus on a performer on stage; in the round, where the stage is in the center of the space and the audience is all around the stage area; and when the floor and the stage is on a single level for distance learning and education programs and for orchestra rehearsals.
"The size and configuration that can be setup when the floor is flat in Zankel Hall corresponds to the stage area of the Isaac Stern Auditorium. This was all accomplished by making the entire floor of Zankel Hall a series of lifts. The moveable lifts help to adjust for floor height and allow for the alternative configurations. We also had to find a way to store all of the seating. They are all stored in an area we call the 'garage.' It is about one-third the size of the hall itself. All of the seating elements can be stored in this space. The ultimate goal was to make the changeover from one configuration to the next as simple as possible," Fleischer said.
The ceilings are unusual and flexible too. Ekus noted that Zankel Hall's ceiling is actually two ceilings, each consisting of 2-in. plaster. The mechanical duct work and sprinkler piping has been placed in between these two ceilings and the entire ceiling element is suspended on 6x9 steel beams supported on rubber pads to isolate sound and vibration from the Isaac Stern Auditorium above.
In addition, he said, all of the electrical wiring for all of the equipment will be hung from the ceiling in recessed troughs.
Flexibility is provided using a series of hangers equipped with acoustic isolators, Czesak continued, adding that no two square feet of the ceiling are the same, making the detailing and finishing work extremely complex.
Between the stage and the ceiling is the limitation of a 20,000-sq.-ft. footprint, portions of which include space for mechanical equipment and needed public spaces. This, combined with the challenge of trying to make Zankel Hall consistent with the elegance and quality of Carnegie Hall led to a design solution that incorporated as many double-height lobby areas as possible to provide a sense of openness and not one of confinement below grade, Fleischer explained.
In order for all of the double-height spaces and openness to be created, the existing facility, a commercial movie theater, which had originally been a recital hall, had to be demolished, because it was architecturally and acoustically compromised beyond restoration, Malenka said.
"Carnegie Hall decided to gut the space and create something new, reclaiming the space and restoring Andrew Carnegie's concept of three concert halls under one roof," he added.
Contractors in Concert
The project team faced other challenges too; including performing the work while Carnegie Hall remained operational. Czesak said the solution was an ongoing coordination effort between all team members, which included Carnegie Hall. Carnegie Hall altered its rehearsal schedule and the contract Tishman holds from Carnegie Hall specifies a "no noise" work time, which means there can be no noise from midnight to 6 a.m. As a result, the working hours for the construction crews are from 7 a.m. to 3 p.m, unless arrangements have been made with Carnegie Hall.
Czesak also noted that the contract contains "go-away" days. She described these as days the owner could use to stop construction in the event the contracted noise time was needed for ongoing operations. In addition, she said Carnegie Hall closes in the summer. This is a limited window of opportunity in which work could be planned and phased without concern for noise or interruption of Carnegie Hall's regular hours of operation.
She further noted that Carnegie Hall is a landmark building and as such, exterior work will consist of fabricating terra cotta pieces and specialty brick for the entrance to the foyer that leads to the new Judy and Arthur Zankel Hall.
The curtain at Zankel Hall will rise shortly. The project is expected to be completed by year-end and the first performances are scheduled for September 2003.
andante - 3 April 2003
http://www.andante.com/images/Articles/11zankelhallrendering200.jpg
New York's Carnegie Hall unveiled its third auditorium, the mid-sized, subterranean Zankel Hall, at a press conference on Wednesday. The 644-seat space, complementing Carnegie's 268-seat Weill Recital Hall and 2,904-seat Stern Auditorium, opens in September with a wide-ranging two-week festival.
"Our house of music has a new wing," said executive and artistic director Robert Harth.
A sycamore-lined "shoebox" placed within elliptical walls, Zankel's most prominent feature is its flexibility. A series of lifts enables the floor to be arranged in several configurations, with stages of various sizes and locations (the rows of seats are moved on air casters); a moveable ceiling allows for a range of lighting and theatrical equipment.
The first year of programming at the hall reflects its adaptability, with semi-staged events from the Kronos Quartet and cabaret star Audra McDonald. But perhaps as importantly, the moldable hall seems to have inspired an eclectic approach to programming, with new music, world music, pop, folk, cabaret, and jazz appearing nearly as often as traditional classical repertoire. "Great music comes in many forms and sizes," Harth said. "We wanted Zankel to have its own identity but we wanted the identity to be within the mantle of Carnegie Hall."
That identity is introduced in a two-week festival that begins on 12 September with a concert of 20th-century and contemporary music led by composer/conductor John Adams. Other festival performers include Cuban pianist Omar Sosa, cellist Yo-Yo Ma, jazz musicians Kenny Barron and Dianne Reeves, actress Anna Deavere Smith, Pierre Boulez' Ensemble Intercontemporain, and James Levine and the Met Chamber Ensemble. There is no opening gala, Harth emphasized, in order to encourage the widest possible audience to visit the hall.
The diverse programming continues through the 2003–04 season, with chamber music and recitals mingling with world music and cabaret. Jazz fans angered by the disbanding of the Carnegie Hall Jazz Band in 2002 will be pleased to find a four-concert jazz series produced in collaboration with George Wein's Festival Productions. Carnegie Hall's previously announced "Perspectives" artists for the season — pianists Mitsuko Uchida and Emanuel Ax, conductor Michael Tilson Thomas and soprano Dawn Upshaw — will bring parts of their series to Zankel, as will a just-announced fifth "Perspectives" curator — Brazilian singer/songwriter Caetano Veloso. Adams, who takes up the Debs Composer's Chair at Carnegie Hall in September, hosts a three-part interview series in Zankel as well as assisting with the hall's educational and other programming.
With the addition of a third performing space, Harth pointed out, Carnegie Hall is returning to its original configuration. When the hall opened in 1891, there was a lower-level Recital Hall underneath the main auditorium (in fact, Harth noted, Carnegie's first performance, by pianist Arthur Friedheim, took place there). But conversions of the space for various uses over the years (its most recent incarnation was the Carnegie Hall Cinema) left it unusable for music. Four years of construction — including the removal of 6,300 cubic yards of bedrock — have restored the third hall, albeit in an expanded and updated form.
"By realizing Andrew Carnegie's original vision of three very different musical stages under one roof," Harth said, "we are embracing and expanding upon Carnegie Hall's unique history."
http://newyork.construction.com/NYCN/NYmay2002/cover
May2002.html
New York Construction News - Cover Story
Worker Harmony 'Composes'
Facility Under Carnegie Hall
By David S. Chartock
It may not be Beethoven's Fifth, but the noise beneath Carnegie Hall is a well-orchestrated composition being played by construction workers whose instruments have included backhoes, hoe rams, drills, flat jacks, hydraulic jacks and hammers.
When completed, their composition will be known as Judy and Arthur Zankel Hall. Until its completion, work has been progressing since 1999 in a confined space that had to literally be carved out, requiring the removal of nearly 7,000 cu. yds. of rock.
To create a $70.5 million, 41,000-sq.-ft., three-level, multipurpose performance and education space with a 20,000-sq.-ft. footprint beneath Carnegie Hall's Isaac Stern Auditorium was no easy task.
"It's like building a ship in a bottle," said Nancy Czesak, vice president and project executive for Tishman Construction Corp, the project's New York-based construction manager.
"We are constrained by the rock below ground, the lack of access above ground and the three-dimensional perspective of this unique space," she added.
It also required a lowering of a floor by 24-ft. for the existing space, that was demolished, installation of a temporary shoring system and construction of a new concrete structure, added Tishman Construction's Chairman John L. Tishman.
The Excavation
To create the space necessary for an intermediate-sized facility, 7,000 cu. yds. of Manhattan Schist was excavated from beneath the landmark building, explained Richard Malenka, director of administration for Carnegie Hall Corp. Inc., the project's New York City-based owner.
Schiavone Construction Inc. of Secaucus, N.J., did the excavation and foundation work as well as the structural metal framing and concrete and masonry work. The firm also performed the specialized tunneling work required for this project.
"It was very complicated as to how they staged their work into the site. There was a great deal of innovation with regard to how we would use a tunneling contractor. John Tishman challenged the team to think out of the box by suggesting logistic impediments that needed to be taken into account, such as the subway tunnels. He viewed this as a mining operation and kept encouraging us to carefully review the capabilities of our contractors so that the right contractor would do the right job," said Czesak, who is also Tishman's project manager for Zankel Hall.
Schiavone brought experience and skill to the job to accomplish its task. They brought the proper equipment and the ability to modify that equipment for changing underground site conditions, she noted.
Anthony DelVescovo, a project manager with Schiavone Construction said, "our end of the project included the demolition of the existing building underground, rock excavation and providing temporary support for the existing building below ground.
"We excavated up to 35 ft. deep to rock. Before that, we had to perform some structural demolition to remove existing walls and concrete slabs. There were 750 cu. yds. of brick removed," DelVescovo explained.
In order to take the brick out," he continued, temporary steel supports had to be installed. Sometimes we had to needle the supports through existing brick walls. These needle beams were picked up by header beams, which in turn were picked up by the shoring towers.
There were other areas that had to be underpinned, including the existing stage. To do this, DelVescovo said, underpinning panels were installed under the existing brick wall for the main hall. Existing cast iron columns also had to be extended by temporarily supporting the columns so the rock below them could be excavated. Then, rock was excavated up to 16 ft. deep and new concrete piers were installed to lower the footings. In addition, two 80-ft.-long, W36x393 steel beams were placed above a brick wall to support the brick wall so the brick wall below it could be demolished.
The main hall seating area, he noted, also had to be supported. "This was done by drilling caissons 30 ft. below the excavation line and then installing 12 columns that supported the structure above. We also installed header beams above these columns to pick up the existing girders for the main hall. We had to transfer loads using flat jacks and hydraulic jacks."
Tunneling
Tunneling was also challenging. In order to tunnel, Schiavone had to install an elevator in order to transport its machinery down to the site.
"We had a 12-ft.-wide by 9-ft.-high hole in the exterior of the existing building at the sidewalk level. Then we installed a 20-ton hydraulic elevator that was custom made for this project. We brought in all of our equipment, including hoe rams, drills, excavators, loaders, Bobcat loaders and an air track drill," DelVescovo explained.
Excavation began after all of the temporary shoring was done. Then 7,000 cu. yds. of rock was removed using different methods of rock removal, including hoe rams and some chemicals to expand mortar so the rock would crack, he added.
"We also used limited, controlled blasting and a lot of it. About 1,500 cu. yds. was taken out by hand using small drills, sinking hammers and jack legs. Hydraulic splitters were also used. All of the rock was taken out in 4 cu. yd. boxes using forklifts." DelVescovo noted.
"Installation of structural steel for permanent support of the building was next. The two 80-ft. beams were a part of this. All of the beams were set using chain falls and come alongs," DelVescovo explained, noting, "we had 400,000 lbs. of structural steel that was moved in through that small opening and then assembled below. We had about 30 columns to remove as well."
"Everything was dependent on each other," he continued. "After the excavation was done, the steel was in place and the temporary shoring was removed, we installed our concrete walls and slabs."
DelVescovo said there are three different slab levels: the pit level, the parterre level and the mezzanine level. "We had to drill 72 caissons into the pit level so screw jacks could be installed to support the stage," he added.
Structural Design
"The entire structural design involved shoring up the existing structure to allow for rock removal and then building a new structural support system that consisted of an elliptical, sloping, reinforced concrete wall 30 ft. high and 100 ft. long," noted Alastair Elliott, a senior engineer with Robert Silman Associates, the project's New York-based structural engineer.
The 12-in.-thick, elliptical 5,000 psi concrete wall is sloped at a 7-degree angle for acoustical and structural purposes. In order to pour the wall, shoring columns first had to be used to shore up the existing beams, explained Dan Ekus, Tishman's project superintendent. When the foundations for the wall were poured, the load was transferred from the shoring beams to the wall. This, he noted, required two weeks of intense coordination.
One of the project's structural challenges was its proximity to the N and R subway lines, which required approval from the Metropolitan Transportation Authority/New York City Transit, Elliott said.
"We were 9 ft. from the tracks at the closest point and we had to demonstrate that normal subway line operations would not be impacted by our work. With all of the rock removal, we had to establish a rock-monitoring program that consisted of seismic monitors to detect vibration. We also worked closely with URS, the project's New York-based geotechnical engineer, monitoring the rock removal process and providing assistance regarding placement of rock anchors to Schiavone Construction," Elliott added.
Other Structural Challenges
Other structural challenges required the "predeflection of all of the transfer steel to ensure that there would be no movement of the main hall floor and stage above," Elliott said, noting that A36 steel was used along with connections to cast iron columns throughout the original lower level structure. We could not weld the steel connections because of the cast iron columns. Instead, all of the cast iron column connections had to be rebolted or drilled and tapped. This was time-consuming because of the time it takes to drill through cast iron.
"Every square foot, vertically and horizontally, is different. For example," Czesak said, "architectural and structural details on one side of the project differ from the other side. This space is unique and does not exist anywhere else."
Flexible Space
This unique space was specifically designed to be flexible, Tishman added. To make it flexible required a system of lifts and chair wagons to allow the configuration of the space to be changed to meet different performance needs. Chair wagons hold 24 seats and are moved on casters to provide a quick and easy method for configuring space based on the type of performance.
The basic design is a rectangular auditorium inside the elliptical shell. It features an auditorium floor that will be on a series of lifts in order to enable the auditorium to be configured from traditional and stage seating to a center stage or flat floor facility. The end stage can be three different sizes as a result of the lifts, Carnegie Hall's Malenka explained.
Continuing, Malenka said there are two different center stage configurations as well. One is symmetrical and the other is asymmetrical. There are also two flat floor configurations; one is slightly lower than the other, which relates to capacity. In the facility's maximum configuration, which will be the smallest end stage and largest audience, there will be 650 seats.
Primary Configurations
The three primary configurations, according to Joe Fleischer, partner in charge, The Polshek Partnership, the project's New York-based architect, include: the end stage configuration in which people in the audience can focus on a performer on stage; in the round, where the stage is in the center of the space and the audience is all around the stage area; and when the floor and the stage is on a single level for distance learning and education programs and for orchestra rehearsals.
"The size and configuration that can be setup when the floor is flat in Zankel Hall corresponds to the stage area of the Isaac Stern Auditorium. This was all accomplished by making the entire floor of Zankel Hall a series of lifts. The moveable lifts help to adjust for floor height and allow for the alternative configurations. We also had to find a way to store all of the seating. They are all stored in an area we call the 'garage.' It is about one-third the size of the hall itself. All of the seating elements can be stored in this space. The ultimate goal was to make the changeover from one configuration to the next as simple as possible," Fleischer said.
The ceilings are unusual and flexible too. Ekus noted that Zankel Hall's ceiling is actually two ceilings, each consisting of 2-in. plaster. The mechanical duct work and sprinkler piping has been placed in between these two ceilings and the entire ceiling element is suspended on 6x9 steel beams supported on rubber pads to isolate sound and vibration from the Isaac Stern Auditorium above.
In addition, he said, all of the electrical wiring for all of the equipment will be hung from the ceiling in recessed troughs.
Flexibility is provided using a series of hangers equipped with acoustic isolators, Czesak continued, adding that no two square feet of the ceiling are the same, making the detailing and finishing work extremely complex.
Between the stage and the ceiling is the limitation of a 20,000-sq.-ft. footprint, portions of which include space for mechanical equipment and needed public spaces. This, combined with the challenge of trying to make Zankel Hall consistent with the elegance and quality of Carnegie Hall led to a design solution that incorporated as many double-height lobby areas as possible to provide a sense of openness and not one of confinement below grade, Fleischer explained.
In order for all of the double-height spaces and openness to be created, the existing facility, a commercial movie theater, which had originally been a recital hall, had to be demolished, because it was architecturally and acoustically compromised beyond restoration, Malenka said.
"Carnegie Hall decided to gut the space and create something new, reclaiming the space and restoring Andrew Carnegie's concept of three concert halls under one roof," he added.
Contractors in Concert
The project team faced other challenges too; including performing the work while Carnegie Hall remained operational. Czesak said the solution was an ongoing coordination effort between all team members, which included Carnegie Hall. Carnegie Hall altered its rehearsal schedule and the contract Tishman holds from Carnegie Hall specifies a "no noise" work time, which means there can be no noise from midnight to 6 a.m. As a result, the working hours for the construction crews are from 7 a.m. to 3 p.m, unless arrangements have been made with Carnegie Hall.
Czesak also noted that the contract contains "go-away" days. She described these as days the owner could use to stop construction in the event the contracted noise time was needed for ongoing operations. In addition, she said Carnegie Hall closes in the summer. This is a limited window of opportunity in which work could be planned and phased without concern for noise or interruption of Carnegie Hall's regular hours of operation.
She further noted that Carnegie Hall is a landmark building and as such, exterior work will consist of fabricating terra cotta pieces and specialty brick for the entrance to the foyer that leads to the new Judy and Arthur Zankel Hall.
The curtain at Zankel Hall will rise shortly. The project is expected to be completed by year-end and the first performances are scheduled for September 2003.