Funaoka Health and Welfare Community
Center
Location: Funaoka, Tottori Pref.
Site Area: 40,000 m2
Building Area: 1,877.9 m2
Total Floor Area: 2,710.3 m2
Total Story: 2
Completion: 1996
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SITE CONDITIONS AND BASIC CONCEPT
The site of 40,000�F which cuts open a hill is approximately 1km south of the town hall of Funaoka town, a suburb of Tottori city.
This facility of Health & Welfare Center is designed based on four images of "cheerful", "soft", "tender" and "warm". Those images are concretely expressed as a large and bright space, a softly curved shape along with the ridges of surrounding mountains, a tender function for the environment and users, and a warm of appearance and touch by natural materials.
ARCHITECTURAL CONCEPT
This building was divided into south, center, north and workshop building corresponding to the inside facilities and each building was located to turn the facade to the south as much as possible, like drawing a big arc. The building created a rhythm by composition of the curved roofs to harmonize with the nature environment and gave a soft impression responding to the ridge of the hill.
The roof material is titanium (0.2mm thickness) which is light, strong, and of high durability. It realized to give the roof a calm expression, not the original luster color of titanium but in harmony with the surrounding environment, by finishing the titanium a specific coloring (anodized method) for a deep copper green.
The entrance lobby in the center building, with a maximum 12.3m ceiling height as an atrium and is an open and bright space incorporated with the second floor lobby. The second floor lobby is connected to the backyard space by a bridge, making an advantage of difference of the ground levels, which enables to escape directly from the second floor as well as from the first floor. The air conditioning system of the second floor lobby, as it is a huge space, is only from the foot of the floor up to living space to save energy.
The tea ceremony room "Gaseian", at the corner of the second floor is constituted of an outside alley, an inner alley, the main 4.5 tatamimats room and a small kitchen, which are followed by the style of Ura-Senke. The doma of inner alley is finished by the soil of Fukakusa in Kyoto. The stepping stones are from the Kamo River and the washing basin is Kurama stone. The tea room of 4.5 tatamimats follows "Yuin" which is produced by Sen-no-Sotan (a grandson of Rikyu) as a model, and is constituted by a Tokobashira made from red pine with skin, a Tokogamachi made from polished Kitayama-cedar and a ceiling composed by ajirogumi with Kurobe's None-cedar as Kakekomi style.
STRUCTURAL CONCEPT
The large roof of the center building is supported by a jointed structure composed of the large beams made of American-pine laminate timber (340mm x 800mm) from U.S.A., the small beams (170mm x 400mm) from Japan (JAS spec. grade 1) and the steel rods which work as tension bar. This structure realized to have a large span of 28m, though it is a wooden roof structure, and to restrain the central displacement of large beam in less than 63mm against 1.7m snow depth (510kg/m2 load). A light structure was created, which features a high tension cast iron joint (tension strength 80t) connecting two steel rods (36mm diameter, 14m length) as a tension bar.
MATERIALS
Stainless steel sash at the entrance hall were provided with a special black color finish and a special bronze color finish partially mirror finish in the rib parts on both ends to expressed elegant massiveness and delicacy. The curtain wall on the second floor in the center building is a curved sash finished with aluminium fluorocarbon resin coating and is a special independent type furnished with an expansion joint in the upper part to follow the displacement up to maximum 100mm. Heat absorbing glass (blue) is used in the glass part to shut out strong sun light from outside. The wall of base platform on the first floor is covered with granite of a cherry blossom color and red granite (lower parts) with jet burner finish. The window circumferences and copings are covered with full polished red granite which brings out a neat and noble image. The walls of the second floor and the workshop building are covered with custom-made stoneware tiles (200 x 60 x 20mm) in a special color (ivory) with low water absorbability. The tiles are processed with a surface finish by hand work which consequently give a feeling of the material with a soft and natural appearance and a massive finish.