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appropriation を避け、1976 当時設計を尊重し retain、アイヌ語地名の継承を中心に置く。Material palette: 1976 RC retain / 神居古潭石 / 北海道松 / オーク / SIPs t=200 / PV 16kW + 地中熱 HP / 紅葉広葉樹 (ナナカマド・カエデ・ヤマモミジ)。","h":200,"id":"e1","label":"旧神居古潭小中学校 (旭川市神居町神居古潭) 敷地 10,840㎡","material":{"code":"SIPS","f_star":"F4","fire_rating_min":45,"name":"Structural Insulated Panel","thickness_mm":200,"u_value_w_m2k":0.2},"rotation":0.0,"shape":"box","w":110000,"x":5000,"y":5690,"z":-200},{"cls":"IFCWALL","d":200,"descr":"1976 年築 RC 外周壁 t=200mm 全長 30m を 6 segment に分割。既存 retain + 内側 SIPs t=200 追加で U=0.16 まで断熱強化、旭川 -30°C / 1.8 kN/m² 雪荷重対応。アイヌ語地名 神居古潭 の継承として 1976 当時の RC 表情を外装に残す。内側仕上は北海道松 t=15 縦張、内装は中性 (アイヌ motif を装飾化しない)。","floor":1,"h":3600,"id":"e2","label":"校舎北壁 1F seg#1 RC t=200 (1976 retain)","material":{"code":"SIPS","f_star":"F4","fire_rating_min":45,"name":"Structural Insulated 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は南面、紅葉広葉樹越しの渓谷遠景。","floor":1,"h":3600,"id":"e37","label":"校舎南壁 2F seg#6 RC t=200 (1976 retain)","material":{"code":"SIPS","f_star":"F4","fire_rating_min":45,"name":"Structural Insulated Panel","thickness_mm":200,"u_value_w_m2k":0.2},"rotation":0.0,"shape":"box","structural":{"axial_capacity_kn":250.0,"load_bearing":true,"seismic_grade":"2"},"w":5000,"x":40000,"y":15690,"z":3600},{"cls":"IFCWALL","d":2500,"descr":"東妻 RC retain + 内側 SIPs 200 + 北海道松 t=15。外装は 1976 当時の RC 素地を露出 (神居古潭石 plinth と continuity)。","floor":1,"h":3600,"id":"e38","label":"校舎東壁 2F seg#1 RC t=200 (1976 retain)","material":{"code":"SIPS","f_star":"F4","fire_rating_min":45,"name":"Structural Insulated Panel","thickness_mm":200,"u_value_w_m2k":0.2},"rotation":0.0,"shape":"box","structural":{"axial_capacity_kn":250.0,"load_bearing":true,"seismic_grade":"2"},"w":200,"x":44800,"y":15690,"z":3600},{"cls":"IFCWALL","d":2500,"descr":"東妻 RC retain + 内側 SIPs 200 + 北海道松 t=15。外装は 1976 当時の RC 素地を露出 (神居古潭石 plinth と 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retain)","material":{"code":"RC","f_star":"F4","fire_rating_min":60,"name":"鉄筋コンクリート","thickness_mm":200,"u_value_w_m2k":0.35},"rotation":0.0,"shape":"box","w":30000,"x":15000,"y":15690,"z":3600},{"cls":"IFCROOF","d":15000,"descr":"1976 RC 陸屋根 retain + 高性能防水 + 真空断熱 t=120。1.8 kN/m² 雪荷重を 1976 当時の躯体で支持確認済。PV 16kW を屋根上に 42 panels 配置 (校舎 + 体育館 屋根を兼用)。","floor":2,"h":180,"id":"e52","label":"校舎屋根 RC slab t=180 + 防水 + PV 16kW (部分)","material":{"code":"RC","f_star":"F4","fire_rating_min":60,"name":"鉄筋コンクリート","thickness_mm":200,"u_value_w_m2k":0.35},"rotation":0.0,"shape":"box","w":30000,"x":15000,"y":15690,"z":7200},{"cls":"IFCWINDOW","d":220,"descr":"1976 年 教室窓 rhythm 900×1800 を retain。Triple-glazed argon Uw=0.8 で更新、開口寸法そのまま (Lacaton-Vassal 戦略)。石狩川峡谷 + 紅葉広葉樹 (ナナカマド・カエデ・ヤマモミジ) の view を framing。北海道松 sash + オーク内枠。","floor":1,"h":1800,"id":"e53","label":"校舎南面 教室窓 1F #1 (1976 rhythm 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