House with 30,000 Books is a residence for two families, which has a large library between those two dwelling parts. As the name suggests, the number of books the library can store is about 30,000, which almost equals to the number of books that one small public library can store. The library space, sometimes works for bonding two families, sometimes works as a buffer space, is the common property for them and the most spacious place of this house.
When we design a house for two families, independence of the two dwellings is always a big problem. In the case like this house, using library space to draw two dwellings apart is very effective way for keeping privacy of both families, so naturally the library was inserted between the two dwellings. The unusual point is that the library’s layout was rotated 45 degrees from the main axis, because the surroundings around the house happened to have empty space in northeast and southwest directions, so in order to evade crowded views, both ends of the library with windows are facing to those orientations.
And to widen the views from the library more, two parts of the building mass were cut away in triangle shapes like two wedges of cheese, and two sunken gardens for the library were made instead. Each of these open-air spaces is facing to a dwelling part at the same time, and works as a small private garden for it. These sunken gardens are buffer spaces between two dwellings, but through those spaces the families can feel the situation inside the library and the other dwelling indirectly. Those open-air spaces are connecting two dwellings while they are also separating them mildly.
Of course, the library is not just for book stock. Having wide views and natural sunlight with high ceilings, this is the most attractive space of the residence. Usually the windows are closed for blocking out ultraviolet light and humidity in order to preserve the books, but they can be widely opened if needed, and thanks to the rotated layout and two open-air spaces, the library can show great transparency though it has complete ability for storage.
On sunny days, they can fully open windows for ventilation, and enjoy bright views with 30,000 Books, both families together. I believe that is the greatest pleasure for book collectors, and this is the scene we tried to be realized through this project.
Structure : Wood
Architect : Takuro Yamamoto
Structure Design : Matoh Structural Design Office
Construction : Koushou Koumuten
Floor: Maple Flooring
Wall: plasterboard + AEP
Ceiling: plasterboard + AEP
Exterior Finish: galvanized steel sheet, mortar + ceramic paint
三万冊の本の家
東京都内に建つ二世帯住宅です。二つの住戸の間に挟まれた大きな書庫が特徴で、本の収納量は家全体で約三万冊分あります。小さな公立図書館なみだと考えて頂くとイメージしやすいかも知れません。
この書庫は両家の間に少し距離を置くための緩衝地帯であると同時に両家の共有財産であり、また二つの家をつなぐ紐帯でもあります。敷地周囲ではたまたま北東と南西方向に家並みが途切れているため書庫の両端の採光面二つはそちらへ45°角度をねじって向けられており、書庫が家全体を斜めに横断するように計画されている点がプラン上の特徴だと言えるでしょう。この書庫の採光面二つからの視界をより広くするため、建物はこれらの部分でチーズのように大きく三角形に切り取られ、その結果ニッチ状の外部空間が二つ出来上がっています。この二つの三角形ニッチはもちろん書庫の採光のための空間なのですが、同時に二つの住戸それぞれの窓に面した庭でもあり、住戸Aと書庫、書庫と住戸Bとがそれぞれ共有するアウトスペースとなっています。二世帯住宅において二つの住戸をどの程度独立させ、一方でどの程度密接な関係を持たせるかは常に問題となるテーマですが、この住宅では緩衝空間として書庫を挟んだだけでなく、書庫のために作られた二つの庭を経由して両住戸を間接的につなぐことで、お互いの生活が直接目に入ることはないがぼんやりと動向が感じられる、そのような両家の距離感を作り出そうと考えました。
書庫は単に本を収納するスペースというだけではなく、この家で最も豊かな、建物を代表する空間でもあります。通常は本の保護のため全ての扉は閉ざされ、直射日光や通気を遮断するように計画されていますが、必要に応じて扉は外部へ大きく開放することが可能です。気候の良い時分には是非扉を開けて空気を入れ替えると共に、景観とたくさんの蔵書に囲まれた贅沢なひとときを過ごして頂きたいと考えています。