proposed informal auditorium - District of Columbia Public ... Concept Design Part 2.pdf ·...
Transcript of proposed informal auditorium - District of Columbia Public ... Concept Design Part 2.pdf ·...
Great Hallperformance
space
ceiling
brick veneer on wooden panel
steel wall structure
acoustic panel
MLK Jr. wall panel frame
MLK Jr. wall panel painting
steel door structure
brick veneer on wooden panel
acoustic panel
pivot door floor box
steel door structure
granite floor
proposed informal auditoriumdetails pivot doors
DETAIL 1
detail1
Artist impression, front view informal auditorium
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performancespace
Great Hall
back of housecore
brick veneer on wooden panel
brick wall
steel door structure
acoustic panel
pivot door floor box
separation between two doors
acoustic finishing
separation wall
proposed informal auditoriumdetails pivot doors
DETAIL 2
detail 2
Artist impression, front view informal auditorium
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Intended Design:- The facade was built as it was designed. Clear glass on the ground floor and
bronze-tinted glass on levels 2, 3, 4F.
Existing Design:- all windows are equipped with venetian horizontal blinds.
Remarks:- due to corrosion of the curtain wall, many of the glass panels are broken.
(Reference “Exterior Assessment Report, Freelon, June 2012” )- the original pivot doors on G Street, were later replaced by two revolving
doors (exact date unknown at this time). - virtually all of the original venetian blinds have been replaced by roller curtains.
Proposed Improvements:- the replacement of the existing single glass units to IGUs (insulated glass
units) is the best “value for money” solution and the least aesthetically/structurally disturbing. The thermal performance of the building will increase significantly and lamination of the inner layer of the IGU for ‘fall through’ protection is an option. Several other options have been suggested in past reports, however these would be more costly, impact the facade structurally, and alter the original detailing.
- the horizontal venting bars located on the ground floor and in the children’s library are not original and should be removed.
- it is important that new IGUs are installed . Special care should be taken during the fabrication process to prevent a different cavity width. Even the smallest degree of variance can result in a distorted reflection.
- roll curtains could be replaced by venetian blinds that follow the original design intention.
2.2.3 installation of double-pane windows.
recent photograph showing bronze-tinted glass on 2, 3, 4F and clear glass on 1F
photograph of horizontal venting bars, located at level 1F, adjacent to windows
recent photograph of water infiltration along the windows
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photograph of model showing bronze-tinted glass on 2, 3, 4F and clear glass on 1F
51 Exterior Assessment Report |
Analysis WJE developed three possible concepts to improve the thermal performance of the existing facade. Our concepts were based on introducing a thermal break into the facade assembly, either at the glass or at the glass and frame, and include the following:
• Concept No. 1: Remove the existing interior glazing stop and glass, install a thermal break between the glazing stop and remainder of the frame, install an insulated glazing unit (IGU), and reinstall the interior glazing stop (Figures T33 and T34)
• Concept No. 2: Install a new interior storm unit attached to the existing frame (Figures T35 and T36).
• Concept No. 3: Install new glass with new spacer attached to existing glass (Figures T37 and T38).
For each concept, WJE conducted a thermal performance analysis to predict how much the heat loss would improve, or in other words, how much the U-factor would decrease. The analysis was performed using the THERM and WINDOW computer modeling software for the same typical details.
Using the models developed using THERM and WINDOW, U-factors were calculated for the window system at the Library. The calculations used an interior temperature of 70 degrees Fahrenheit (°F), and an exterior temperature of 29°F, the average low temperature in Washington D.C. in January. The results are summarized in the table below.
U-Factor Surface U-Factor (Btu/h ft2 ˚F)
Sec
ond
thro
ugh
four
th
floor
ass
embl
ies
Center of glass 1.00Edge of glass 1.03Frame 3.6
Second floor spandrel 0.78
Third and fourth floor spandrel 0.82Roof spandrel 0.67Intermediate vertical mullion 2.26Column 1.17
Firs
t floo
r as
sem
blie
s
Center of glass 1.00Edge of glass 1.02Frame- Sill 1.51Frame- Intermediate horizontal 3.67Frame- Head 1.67Frame- Jamb 2.67Frame- Intermediate vertical mullion 3.67
Figure T32: Typical THERM inputs for Repair Concept No. 1 at second through fourth floors.
New IGU: PPG Solarban 70XL on 6mm Solarbronze, 90% argon fill; 6mm clear
Warm-edge spacer
PVC thermal break (1.18 Btuˑin/h ˑ ft2ˑ F̊)
Figure T34: Typical THERM inputs for Repair Concept No. 1 at first floor.
New IGU: PPG Solarban 70XL on 6mm Solarbronze, 90% argon fill; 6mm clear
Warm-edge spacer
PVC thermal break (1.18 Btuˑin/h ˑ ft2ˑ F̊)
Figure T33: Typical THERM inputs for Repair Concept No. 1 at second through fourth floors.
Figure T34: Typical THERM inputs for Repair Concept No. 1 at first floor.
expert from Exterior Assessment Report by Freelon: repair concept no.1
2-13/16" steel cut from 2"x3"x3/8" L
1-13/16" steel cut from 2"x2"x3/8" L
3"x4"x3/8" steel L
concrete slab 5"
3/8" steel plate
girder
ceiling
3"x4"x3/8" steel L
single glass
2-13/16" steel cut from 2"x3"x3/8" L
1-13/16" steel cut from 2"x2"x3/8" L
3"x3"x3/8" steel L
facade I-beam 10"x5"
proposed double-pane windows.
vertical detail
horizontal detail
steel facade fixing
steel L
2-13/16" steel cut from 2"x3"x3/8" L1-13/16" steel cut from 2"x2"x3/8" L
3/8" steel plate
concrete slab 5"
girder
ceiling
single glass
facade I-beam 10"x5"
steel L1-13/16" steel cut from 2"x2"x3/8" L
steel L
prefab combined facade fixingsteel L - thermal break - steel strip
insulation
water sealing
prefab combined facade fixingsteel L - thermal break - steel strip
insulation
double glazing
welded strip
current pane windows.
vertical detail
horizontal detail
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Intended Design:- when the original massing model was built it did not include site brick walls at
the ground level. By the time a final model was built, site brick walls were incorporated, but at a much lower height than what was ultimately built.
Existing:- the site brick walls at the east, west, and north sides on G Place significantly
impact the intention of a completely open ground plane. The uniform height of the walls causes an overbearing condition for passerby’s at the back of the building.
Remarks:- the original intent was for the spaces between the walls and the glass facade
to be accessible. Currently, fences inhibit any openness and the spaces go unused.
Proposed Improvements:- the walls should either be removed or lowered substantially in order to achieve
the originally intended openness of the site.
2.2.4 lower site walls along G Place and 9th Street
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original massing model: no site walls and no height difference at the street
Corner of 9th Street & G Place example of unused outdoor space along G Place
original model showing a lower wall
proposed walls along G place and 9th street
detail 2
DETAIL 2
DETAIL 1
detail 1
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Artist impression, Corner of 9th Street & G Place
Artist impression, view from 9th street looking G place
Intended Design:- The drawing of the original floor plan (May 12, 1966) shows the indoor space
symmetrical compared to the north and south. Both sides have a loggia with the same size. The intention of this design was most likely to use the loggia along G place as a public space.
Existing:- Due to extra SF required on the ground floor the northern area has been
increase along G place.
Remarks:- the original intent was for the spaces between the walls and the glass facade
to be accessible. Currently, fences inhibit any openness and the spaces go unused.
Improvements:- the site walls should either be removed or lowered substantially in order to
achieve the originally intended openness of the site. - the design team proposes to extend the activities of the NE building wing
along G place, through seamless doors, for outdoor activities.- the design team proposes to open the corner on 9th street and G place and
make it accessible using the introduction of stairs.
2.2.5 expanding the east wing along G place.
photograph of original drawing (May 12, 1966) with loggia along G place
revised preliminary drawing (October 7, 1966) with revised facade along G place
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corner of 9th Street & G Place
example of unused outdoor space along 9th Street
proposed extension of the east wing along G place.
Artist impression of extended east wing along G Place
Artist impression, axo corner of 9th Street & G Place
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Intended Design:- the alley that connects G Street to G Place was designed to be an open access
avenue for the public’s use.
Existing Design:- a brick wall and metal fence block any movement through this space.
Remarks:- this blockage creates an unused, hidden area that has potential to be unsafe.
Proposed Improvements:- locating a bicycle kiosk in this area would create an entrance for public bicycle
access and storage, invigorating this public avenue.
2.2.6 bicycle kiosk - area
photo of original Mies van der Rohe model showing open alley for public access
view from G Street, looking North to G Place. A wall divides the alley. view from G Place, looking South to G Street. The wall can be seen at a distance.
view from the loggia along G Street, looking west
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Proposed bicycle kiosk
Fragment of the Ground floor
Artist impression, view from G street looking east
Artist impression, view from G Street, looking North to G Place.
Artist impression, view from the loggia along G Street, looking west
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Intended Design:- The drawing of the original floor plan (October 7, 1966)show the central area occupied by different functions Existing:- N/A Remarks:- Due to the symmetrical position of this area and the lack of clear interior views,
this creates a disorienting situation- The current situation seems to go against the Miesian principle of flexibility and
transparency- No daylight in this area Improvements:- The design team proposes to remove all of the partition walls located at the
center of the upper floors in order to have more flexibility, clear interior views, and better orientation.
- This will also allow a clear understanding of public space (front of library) versus non-public space (back of library)
- The clean-up of these floors will bring back and enliven the Miesian principles
2.2.7 open up all three horizontal floors
photography of original drawing (May 12, 1966) clearly showing the central area occupied by functions
photography of the corridor allong the central area photography of the corridor allong the central area
photography of the corridor allong the central area
current floor plan, 2nd floor
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Proposed upper floors
current floor plan, upper floors
proposed floor plan, upper floors
concept
2nd floor
3rd floor
4th floor
non-public
public
non-public
public
non-public
public
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Intended Design:- the structure was designed and built in such a way that two floors can be added
onto the library without additional support.
Existing Design:- the roof level currently houses mechanical rooms and equipment.
Remarks:- The roofing material is composed of an approximately 15 year old, modified
bitumen. Cracking can be seen in the gravel stop materials, along with missing flashing, loose and damaged flashing, and a depressed screen wall with pitch pockets. Additionally, the roof supports the building cooling tower which overtaxes the system and has resulted in the growth of vegetation.
- Area development has resulted in optimal views from the corner of 9th and G Street.
Proposed Improvements:- a portion of the roof should become accessible to the public - preferably the
southeast corner. It’s envisioned that patrons can use this space to sit, read, socialize, and experience the view over 9th and G Streets.
2.2.8 roof garden 5th floor
PAGE | 53
MLK LIBRARY
BUILDING OVERVIEWPRE-DESIGN BUILDING EVALUATION
PAGE | 53
existing roof plan
proposed roof plan
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view from south west corner of roof, looking west
view from south east corner of roof, looking east
view from south east corner of roof, looking south
aromatic herbs knot garden with flowering plants
knot garden with flowering plantsinformal seating
different biotopes - different vegetation winding path
section detail through roof garden
section detail through roof garden
Artist impression, roof garden
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proposed roof gardenreference materials
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the children. The Children’s Hub has an Early Literacy Space with individualized computers to aid in the learning process. A more mature School Age Area and an enclosed Story Telling Room are available and flexible enough to be used for many different functions. The Children’s Hub has its own toilets for children and parental needs. At the center, there will be space designated for the parents/adults as part of the Adult Services. This will allow close visual proximity to their children which will permit more freedom for the children and less worry for the adults. In the northwest corner, there will be the Center for Adaptive Services. The staff of these departments have their office spaces on this floor. Meeting rooms, team rooms, and project rooms with transparent walls are placed along the façade to be used by staff and/or visitors.
Introduce the Third Floor as the Reading Floor. At his level one will find a more classical/traditional library space with a lot of open book shelving and places to read, study, and research. Behind a long wall - entirely filled with books - is the domain for the Executive Offices of the DCPL, the Chief Librarian, direct support staff, and key senior administrators. At the east corner of this floor is the Board Room, to be used for meetings of the Library Trustees. The west side is for Library Business Operations and Library Service Administrative Offices. A staffed reception area provides access to the offices, and seating is provided for visitors. The multiple small meeting rooms are close to this desk. The Staff will directly access the space through the staff elevator and stairs that lead down to the lobby on the ground floor at G Place, and up to the Staff Lounge, Staff Training Lab, and Secret Garden on the Roof pavilion.
Introduce the Fourth Floor as the History and Future Floor. At the west, we combine the Black Studies Center and the Washingtonia Collection. Both have compact shelving close to their information desk. Exhibition space in the lobby of this floor will be as visible as possible. This level is also the Conference and Exhibition Floor, complete with many flexible meeting rooms in various sizes. It will also house pre-function spaces, storage spaces, greenrooms, kitchen, and restrooms. Next to the Mies Restaurant on the southeast corner, an oval 300-seat auditorium will be available for debates, lectures, and performances. A special stair will connect this space to the Mies Café and roof garden above. This will provide access to The History and Future Floor, which will become a destination point for the library visitors, as well as the visitors of the conference center and the public Discovery Garden.
Introduce a new Roof and Garden Floor. An organic shaped horizontal volume gives shape and usefulness to the roof. There is a public Discovery Terrace in the southeast corner with seating elements, performing space, plants and flowers, all well connected to the public elevators and stairs. Here lies the Mies Café, well connected with a special stair directly to the Mies Restaurant below. There is also a Secret Garden for the staff in the northwest corner: a garden with herbs, flowers and berries. There will be an inviting terrace in front of the Staff Lounge that can be used during breaks or meal-time, all directly accessible by the staff elevators (and cargo elevator) and stairs. Wouldn’t it be nice to have also the Staff Training Lab on this inspiring floor? The roof pavilion includes also the extra vertical space that is necessary for the height of the Oval Auditorium.
The Lower Level as the Innovation Floor 1. Non Public 2. Special Collections 3. Center for Innovation and Prototyping 4. Teen Area 5. Loading Bay
The Ground Floor as the City Market Floor 1. Main Public Entrance 2. Marketplace 3. Café/Coffee bar 4. Adult Services 5. Staff Entrance 6. Optional Mixed Use Entrance7. Digital Commons
The Second Floor as the Educational Floor
1. Adult Services 2. Children’s Hub 3. Center for Adaptive Services 4. Staff
The Third Floor as the Reading Floor 1. Staff 2. Adult Services
The Fourth Floor as the History and Future Floor 1. Meeting and Events Spaces 2. Washingtoniana & Black Studies 3. Staff
A new Roof and Garden Floor 1. Café / Restaurant Mies 2. Staff 3. Mechanical Rooms 4. Roof Garden
Just like society, libraries change constantly. Richard Reyes-Gavilan stated “when Mies designed this building in the 1960s, libraries were largely transactional in nature. You come in, you get a book, you leave. Almost half a century later, libraries aspire to be more than just transactional spaces, they aspire to be transformational. They have the ability to make profound differences in the lives of their users, especially the most vulnerable populations who have few other options for acquiring knowledge. We should design, adjust, and improve the building in a way that the building will accommodate CHANGE, even unpredictable change.”
In Mies van der Rohe’s architecture, all floors are designed with similar compositions, allowing for a quick understanding of the space. At the MLK Library, the ground floor has a generous height with impressive lighting, creating the perfect City Lobby. The second, third, and fourth floors all have the similar height and aesthetic. Below grade, there is a lot of potential for improving what is known as “Floor A” as an ideal lower ground floor; and at the roof, design opportunities exist. These are our suggestions:
Introduce the lower ground floor as the Innovation Floor and Teen Area. The west side classrooms and workshop spaces will provide areas to experiment with the latest technologies in 3D printing, image and sound production softwares, and even to make a mess with plenty of noise. With an industrial concrete floor and flexible, acoustic walls the library staff will be able to adjust the spaces as many times as needed; which in turn upholds the innovative spirit. Within the center, the stairs transform from the two cores into tribunes for school groups, playing children, informal debates, lectures, or for anyone simply wishing to sit and chat. This spirit of this floor allows for a deviation from the strict regulations of the Miesian Principles. On the east side of the level is the Teen Area for young adults ages 13-19 . With a digital media center and a homework center, there is space for video viewing, audio listening, and gaming. There are several small meeting rooms on this floor of various sizes that incorporate glass walls so the staff can monitor what is occurring in the rooms.
Not quite as lively, but ever so important are the spaces designated for archival and general storage. At this level, they are within a close proximity to the new loading dock.
Introduce the ground floor as the City Market Floor. The grand welcoming area of the MLK Library will have clear sightlines through the two transparent cores that contain the public elevators and stairs. Guests will pass by a Welcome and Security Desk next to the security line, before entering the Market Place. It is here where one can find the self-charge machines, the self-pick shelves, the displays with the Library’s popular resources such as the latest titles, media, and available e-downloads. A library terrace on the sunny side of G Street, using the protection of the large canopy.
Introduce the Second Floor as the Educational Floor. The east side of this level is designated for the Children’s Hub. It provides space for media collections, technology, and other educational and recreation resources for children from infancy to the age of 12. The shelving is situated low so that the staff has a clear overview of the space. Appropriate and fun furniture elements in the space incorporate soft and colorful hues that resonate with the age group of
3.1 concept narrative Concept for the layout of the next generation library
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The Mechanical Floor 1. Mechanical Rooms
1
5. Adult Literacy
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The Parking Floor 1. Parking 1
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We studied many options for the composition of a “grand ensemble”.
Four important considerations:1. To keep the proportions of the horizontal Mies building, and not extend the building vertically.2. The shift in the city grid at G Street makes the southeast corner of the building special.3. Making the roof accessible to the public is key, preferably the southeast corner.4. A simple beam with a solid end that does not compete with the library is ideal.
The diagonal floating beam looks promising for many reasons. It is a modest solution; one would hardly experience it at street level, so its influence on the horizontal Mies composition is minimal. The diagonal orientation creates space on the sunny southeast corner for a public roof terrace; and for a sunny “secret garden” on the northwest side for staff.
3.2 concept narrative optional extra addition component
The urban change in the grid of G Street makes the south-east corner of the building special and offers a view towards the city
historic map showing the offset of the Pierre L’ Enfant plan
physical urban model
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Study models mixed use component
an alteration in the urban grid reveals an invitingview of the MLK Library. This generates potentialopportunities for announcing the activities within.
site showing alteration in the urban grid
G street
MLK library
9th
stre
et
Concept section library mixed use component.The library works with our without mixed use component.
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500 100 200ftThe urban change in the grid of G Street makes the southeast corner of the building special N
G Street
G Place
9th
Stre
et
10th
Str
eet
11th
Str
eet
12th
Str
eet
8th
Stre
et
F Street
H Street
12
3
4
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view 1, from north-west corner of library, looking east down G Place view 2, from north-west corner of library, looking south down alley
view 3, from corner of 10th and G Street, looking East View 4, south-east corner, from the National Portrait Gallery