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の線が一般的です。同じ線を切断面全般に使う図面もあるので、どちらの意味か凡例に書きましょう。",{"use":11,"draw":12},"断面図や敷地断面図で、地盤線より下の地面に。","地盤線のすぐ下に入れて、下に向かって薄くしていきます。ページ全体を埋める必要はありません。",{"use":14,"draw":15},"壁・屋根・床に入るグラスウールなどの柔らかい断熱材に。","ループの大きさを層の厚さに合わせます。硬い断熱ボードはクロスハッチで描くことが多いです。",{"use":17,"draw":18},"長さ方向に直角に切られた根太、柱、垂木、梁に。","直角に切られた木材には木口の記号を使います。長さ方向に切られた木材は、ふつう木目の線で描きます。",{"use":20,"draw":21},"スラブ下の路盤、排水層、砂利敷きの通路に。","スラブの下に独立した層として描き、その下に地盤のハッチングを入れます。",{"use":23,"draw":24},"建物の断面図や床の詳細に。コンクリートスラブにモルタルと床仕上げ。","層を 1 つずつ描き、厚さは注記で示します。たとえばスラブ、モルタル、仕上げの順に。",{"use":26,"draw":27},"一般的な組積造の壁の断面詳細や平面詳細に。外側はレンガ、断熱材入りの中空層、内側はブロック。","外から内へ層の順番を守り、それぞれに対応するハッチングを使います。",{"use":29,"draw":30},"コンクリート階段を切った建物断面図に。蹴上げ 8 段、斜めの段裏スラブと上の踊り場付き。","蹴上げはふつう 15〜19 cm、踏面は約 25〜30 cm。建てる地域の規則を確認してください。",{"use":32,"draw":33},"基礎の詳細に。地盤に埋めた幅広のコンクリート基礎の上に壁が載ります。","地盤線、基礎のまわりの地盤ハッチング、切断された基礎のコンクリートハッチングを描きます。",{"use":35,"draw":36},"パラペット付き陸屋根の端部の断面詳細に。スラブ、断熱材、防水層をパラペットに立ち上げ、笠木で納めます。","防水層がパラペットを立ち上がっていく様子と、ドレンに向かう屋根の勾配を描きます。",{"use":38,"draw":39},"平面図上で、断面をどこで切り、どちらを見ているかを示すのに。","両端に記号を付け（たとえば A と A）、断面図にも同じ名前を付けます：A–A 断面図。",{"left":41,"top":41,"width":42,"height":42,"rotate":41,"vFlip":43,"hFlip":43,"body":44},0,24,false,"\u003Cg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\">\u003Cpath d=\"M19 4v16H7a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2z\"\u002F>\u003Cpath d=\"M19 16H7a2 2 0 0 0-2 2M9 8h6\"\u002F>\u003C\u002Fg>",{"left":41,"top":41,"width":42,"height":42,"rotate":41,"vFlip":43,"hFlip":43,"body":46},"\u003Cg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\">\u003Cpath d=\"M3 12a9 9 0 1 0 18 0a9 9 0 0 0-18 0m.6-3h16.8M3.6 15h16.8\"\u002F>\u003Cpath 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