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DETAIL 2007 D 6

Documentation

Weekend House in Karuizawa Architects: Makoto Take) & Chie Nabeshima/TNA. Tokyo Lighting design: Masahide Kakudate/Bon Bori, Tokyo Structural engineers: Akira Suzuki/ASA, Tokyo Others involved in the project: see page 696

Almost like something out of a fairy tale, this finely detailed weekend house stands in the midst of a wooded area an hour's car drive from Tokyo. The adjacent roads and the steeply sloping ground made it difficult to sell the site, but when it was offered in conjunction with the weekend house designedby the young architectural practice TNA, interested parties turned up almost immediately. In their mini-tower, which commands a panoramic view on all sides, the owners can now enjoy the surrounding trees on three levels- The house seems to exist without vertical elements; not even the individual storeys are legible. Everything is concealed behind laminated cedar facade strips 28125 cm high. These timber strips are rigidly fixed to 12/12 cm timber columns more than 10 m high. In order to avoid the use of diagonal members, rigid connections were necessary for the prefabricated Vierendeel facade structure. This was achieved with annular split-ring connectors, which unite horizontal members and vertical columns to form a unified whole. On the ground floor, which (s partly buried in the earth, the columns are bolted to the solid base structure. An external layer of burned cedar boarding creates a restrained appearance. Bands of frameless glazing between the strips afford sensuous glimpses through the structure and do justice to the concept of transparency that underlies the entire building,

Sections Floor plans scale 1:200

1 Guest room 2 Vestibule 3 Kitchen/Dining area

4 5 6

Living room Bedroom Bathroom

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61B

Weekend House in Karuizawa

2007 • 6

DETAIL

1 115/210 mm laminated pine with steel annular split-ring connectors 2 10 mm cedar boarding, burned and impregnated 20 mm rigid-foam insulation plastic waterproof layer 115/1250 mm laminated pine unit 3 piastic waterproof layer 15 mm plywood 70 mm (mm.) glass-wool thermal insulation to fails vapour barner on 24 mm plywood 30 mm thermal insuiation 115/240-1250 mm laminated pine rafters 45/50 mm battens 12.5 mm plasterboard soffit 4 120/120 mm laminated pine coiumn 5 50 mm cypress frame with double glazing: 2x 6 mm toughened glass + 6 mm cavity 6 36 mm cypress frame with insect screen 7 smoke-extracl hood: 40 mm veneered piywood 8 fixed double glazing: 2x 6 mm toughened glass + 12 mm cavity 9 12 mm birch parquet 12 -t 28 mm plywood 105/300 mm iaminated pine joists 45/50 mm battens 12.5 mm plasterboard 10 10 mm cedar boarding, burned and impregnated on waterproof layer 150 mm reinforced concrete 105 mm polyurethane insulation 9 + 6 mm piywood

Vertical section scale 1:10

DETAIL 2007 0 6

Documentation

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Weekend House in Karuizawa

2007 D 6

DETAIL

DETAIl

2007 0 6

Vertical section Horizontal sections scale 1:10 50 mm cypress window frame with double glazing: 2x 8 mm toughened glass -i12 mm cavity 36 mm cypress frame with insect screen 10 mm cedar boarding, burned and impregnated 20 mm rigid-toam insulation plastic waterproof layer 115/1250 mm laminated pine unit 3 mm sheet-steel canopy. painted

Documentation

entrance door: 50 mm cypress frame double glazing: 2x 8 mm toughened glass + 12 mm cavity 30 mm birch-veneered chipboard landing/tread fixed at sides with 25/25 mm steel angles 19/65 mm steel-flat staircase string 12 mm birch parquet 12 -f 28 mm piywood 105/300 mm laminated pine joists 30/30 mm battens 12.5 mm plasterboard

8 0 32 mm tubular steel handrail 9 12 mm birch parquet 12 -f 28 mm plywood thermal insuiation between 45/45 mm pine battens and 90/90 mm pine bearers 250 mm concrete floor slab 10 external wall: 10 mm cedar boarding, burned and impregnated waterproof layer 150 mm reinforced concrete plinth 105 mm polyurethane thermal insulation 9 + 6 mm plywood

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