MISSION: HOUSING PRESERVING THE HISTORIC WHILE BUILDING FOR THE FUTURE San Francisco is currently experiencing a growing housing crisis that threatens its residents; by 2030, the city’s population is estimated to increase by 150,000 people while adding only 9,000 new dwelling units. Low-income residents are vulnerable targets for displacement, while historic buildings are under constant threat of demolition due to neglect or new construction. Mission: Housing showcases Metsa Wood products as a tool for alternative development, providing affordable housing in the heart of the city. The proposed building’s form is sculpted in reaction to its context through tapering and shearing. The resultant massing is sensitive to the life of the street while increasing density. The skin system references Churrigueresque patterning, yet expands and shifts across its height to reveal lush gardens and an expanding array of delicate canopies. The original light well is extruded, allowing passive ventilation and natural lighting throughout the core. Communal spaces are provided for urban agriculture, irrigated via in-house greywater purification. This embedded horticulture purifies the air inside the building, provides nourishment for inhabitants, and strengthens San Francisco’s tradition of civic parks. Until now, urban growth has been obstructed by the false dichotomy between preservation and progress, but this is no longer the case. The innovative variety of Metsa Wood technologies facilitates our strong and diversified strategy for sustainable evolution which can strengthen and mature the fabric of the city.
SITE / EL CAPITAN
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TWO-WAY STREET ONE-WAY STREET V
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V V
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V
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SAN FRANCISCO / MISSION DISTRICT
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V BUILDING FIRES (2005-2015)
NO-FAULT EVICTIONS (1994-2015) SOURCE: ANTI-EVICTION MAPPING PROJECT
BUILDING ECOLOGIES GREEN ROOF
THE GREEN ROOF HELPS TO CLEAN AND FILTRATE THE RAINWATER, WHILE REDUCING HEAT GAINS TO THE BUILDING.
RAINWATER COLLECTION
RAINWATER IS CAPTURED, FILTERED, THEN REUSED FOR LANDSCAPE IRRIGATION.
GREYWATER RECYCLING
GREYWATER IS COLLECTED AND TREATED ON SITE. RECYCLED WATER IS STORED AND USED FOR LANDSCAPE IRRIGATION AND TOILET FLUSHING.
SUN SHADING
NATURAL LIGHT AND VENTILATION
EXTRUDED FACADE FINS PROVIDE SUN SHADING WHILE STILL ALLOWING DIRECT SUNLIGHT INTO THE HOUSING UNITS.
THE FACADE SYSTEM ALLOWS FRESH AIR AND NATURAL LIGHT INTO THE CENTER OF THE BUILDING. PLANTINGS AT THE TRELLIS IMPROVES THE AIR QUALITY.
URBAN AGRICULTURE
A VERTICAL FARM AT THE TOP OF THE BUILDING CONNECTS RESIDENTS WITH FOOD PRODUCTION AND PROVIDES THE COMMUNITY WITH LOCALLY GROWN PRODUCE.
CHIMNEY EFFECT
THE CENTRAL ATRIUM PROVIDES PASSIVE VENTILATION THROUGHOUT THE BUILDING. OPERABLE LOUVERS AT THE TOP ALLOWS WARM AIR TO ESCAPE.
PUBLIC ART
INTERIOR SURFACES PROVIDE OPPORTUNITIES FOR RESIDENTS AND THE COMMUNITY TO PERSONALIZE THEIR ENVIRONMENT, ADDING TO THE EXISTING VIBRANT STREET MURALS OF THE MISSION DISTRICT.
CROSS VENTILATION
SINGLE LOADED CORRIDORS ALLOW FOR CROSS VENTILATION THROUGH THE HOUSING UNITS, PROVIDING NATURAL AIR FLOW AND TEMPERATURE REGULATION
COMMUNITY SPACE
COMMUNITY ROOMS, INCLUDING A DAYCARE AND RECREATION ROOMS, ARE PROVIDED AT THE BASE OF THE BUILDING, AND ARE OPEN TO THE PUBLIC.
PUBLIC GREEN SPACE
THE ROOF OF THE EXISTING BUILDING BECOMES A PUBLIC GREEN SPACE FOR THE COMMUNITY. PLANTINGS REDUCE HEAT GAINS TO THE BUILDING BELOW.
WATER TREATMENT
BUILDING GREYWATER IS COLLECTED AND TREATED ONSITE, THEN STORED FOR FUTURE USE.
SPATIAL PROCEDURES
BASE VOLUME
EXTRUDE
TAPER
SHEAR
CIRCULATION
COMMUNAL
SYSTEM ASSEMBLAGE
CURRENT PHASE LVL PANEL COUPLERS STEEL MANIFOLD WITH SELF TAPPING SCREWS SECURED TO LVL PANEL
HIGH STRENGTH POST TENSION RODS TENSIONED BASED ON BUILDING HEIGHT AND SIZE
CONNECTION @ TOP OF SHEAR WALL
KERTO Q SHEAR WALL PANEL
STEEL MESH WITH SELF TAPPING SCREWS FOR SHEAR TRANSFER BETWEEN PANELS
STEEL PLATES WITH SELF TAPPING SCREWS SECURED TO KERTO Q
FUTURE HIGH STRENGTH TIE RODS TO BE PLACED AS BUILDING MOVES TO NEXT STAGE AS NECESSARY PRIOR PHASE LVL SHEAR WALL PANEL
SHEAR WALL SPLICE
KERTO-S JOISTS SPACED TO ALLOW DUCTS WITHIN FLOOR FOR MECHANICAL ELECTRICAL, ECT. CONCRETE TOPPING KERTO-Q PANELS ON TOP AND BOTTOM OF FLOOR ASSEMBLY.
0'-10"
0'-2"
2'-0"
2 BEDROOM UNIT
COMPOSITE FLOOR ASSEMBLY
COMPOSITE FLOOR ASSEMBLY CONNECTION
3 BEDROOM UNIT
STUDIO
KERTO-S COLUMN WITH RECESSED BOLTS AT SLOT AT BASE CONNECTION POST INSTALL BOLTS INTO EXISTING CONCRETE SLAB
KERTO Q COLUMN
STEEL BASE PLATE WITH HIGH STRENGTH GROUT
SELF TAPPING SCREWS STEEL CAP PLATE
NEW COLUMN LOCATED ABOVE EXISTING COLUMN
HSS PIPE CONNECTIONS THREADED ANCHOR
COLUMN CONNECTION @ EXISTING SLAB
EXPLODED ASSEMBLY CONNECTION
KIT-OF-PARTS
FUTURE HIGH STRENGTH TIE RODS TO BE PLACED AS BUILDING MOVES TO NEXT STAGE
PERFORATED STEEL PLATES SLOTTED & GLUED INTO KERTO-Q PANEL FOR COMPOSITE ACTION
STEEL MANIFOLD TO ALLOW ACCESS TO MODIFY HIGH STRENGTH RODS
KERTO-S COLUMN THROUGH EXISTING SLAB TO NEW FOUNDATION BELOW
STEEL PLATES WITH TIGHT FIT PINS WELDED TO EMBEDS INTO CONCRETE
KERTO-S CROSS BEAM WITH OPENINGS FOR MECHANICAL, ELECTRICAL, ECT. SELF TAPPING SCREWS FROM KERTO-Q PANEL INTO KERTO-S JOISTS
STEEL ANGLES WITH HIGH STRENGTH BOLTS
FOUNDATION SIZED FOR FUTURE RETROFITS.
DETAIL @ FLOOR ASSEMBLY
SHEAR WALL CONNECTION @ EXISTING FOUNDATION
COMPOSITE FLOOR SIZED TO ALLOW BOTTOM KERTO-Q PANEL TO CHAR AND BURN OFF IN EVENT OF FIRE
EXISTING CONCRETE SLAB
COLUMN CONNECTION @ EXISTING STRUCTURE
AGGREGATION
AS THE BUILDING GROWS ADDITIONAL POST-TENSIONED KERTO-Q SHEAR WALLS ARE COUPLED TO RECALIBRATE THE LATERAL FORCE RESISTING SYSTEM OF THE STRUCTURE
KERTO-Q SHEAR WALLS & KERTO-S COLUMNS ARE CONSTRUCTED IN 1-STORY SEQUENCES UNTIL PHASING IS COMPLETE
TWO STORIES MAY BE ADDED TO THE EXISTING BUILDING WITH A MINIMAL RETROFIT
CONSTRUCTION ON BOTH TOWERS IS COMPLETE
HOUSING UNITS ARE ADDED TO TOWER ONE
VERTICAL CIRCULATION IS DROPPED DOWN INTO THE EXISTING BUILDNG
BOLTED COLUMN CONNECTIONS CAN BE DISSASSEMBLED ALLOWING UNITS TO BE RESTRUCTURED
ALL PARTITION WALLS ARE NONSTRUCTURAL AND CAN BE RELOCATED, PROVIDING FLEXIBILITY FOR CHANGING TENANT NEEDS
POST-TENSIONED KERTO-Q LVL SHEAR WALLS ARE SIZED FOR FUTURE PHASES AND CONNECTED TO A NEW FOUNDATION, PROVIDING SEISMIC UPGRADE FOR THE EXISTING STRUCTURE.
PHASE ONE
AS THE DENSITY OF SAN FRANCISCO CONTINUES TO INCREASE, MORE HOUSING UNITS ARE ADDED TO BOTH TOWERS
AS OPPOSED TO A FULLY MODULAR DESIGN, THE “KIT-OF-PARTS” SYSTEM MAXIMIZES FLOOR ASSEMBLY EFFICIENCY, SHIPPING CAPACITY, AND MATERIAL SAVINGS
PHASE TWO
PHASE THREE
ADDITIONAL KERTO-S COLUMNS ARE TAKEN THROUGH THE EXISTING BUILDING DOWN TO NEW FOUNDATIONS AND SIZED FOR FUTURE PHASES OF THE BUILDING
PHASE FOUR
CONSTRUCTION ON TOWER TWO CONTINUES
POSSIBILITY FOR RESTRUCTURING ALLOWS COMPLETED BUILDING TO CONTINUALLY MEET CHANGING NEEDS OF THE CITY
PHASE FIVE
VERSATILE UNIT TYPES
LEVEL 12
LEVEL 11
3 BEDROOM LEVEL 3
3 BEDROOM LEVEL 2
2 BEDROOM LEVEL 2
2 BEDROOM LEVEL 1
TYPICAL 1 BEDROOM
LEVEL 10
N
3 BEDROOM LEVEL 1
STUDIO
PROJECTION: TIMBER CITY
20’
STUDIO
2 BEDROOM, LEVEL 2
3 BEDROOM, LEVEL 3
2 BEDROOM UNIT, LEVEL 1
3 BEDROOM, LEVEL 2
1 BEDROOM
3 BEDROOM, LEVEL 1