Unverified80% confidenceDecision RuleTime unknown
落地架宽度超过80cm时优先选带中间立柱或三角加强筋的结构，否则层板长期承重会出现中部下弯，纯两侧支撑的宽层板是变形高发点
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80%
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Long-term
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Unverified单个柜体宽度超过80cm的层板建议中间加竖向支撑或选双柱设计，否则层板跨度过大易变形下弯89% similarUnverified宽度选择受制于层板中间是否有支撑：单跨宽度＞80cm的层板若无中间立柱支撑，重压下易中部下弯变形，宽度需求大应选带中间立柱的多跨结构或加厚层板88% similarUnverified跨度＞40cm的横向层板中央下垂明显，木质层板超过60cm跨度需加中间立柱支撑，否则长期承重会弯曲变形85% similarUnverified层板跨度（单格宽度）超过80cm时，板材书架长期承重会出现中间下垂弯曲，藏书用应控制单格宽度≤60cm或增加中间立柱支撑85% similarUnverified长搁板（≥80cm）必须增加中间支撑点或选加厚层板，否则中部会随时间下垂（蠕变）；实木层板抗下垂优于刨花板/密度板，跨度超过1m建议至少3个固定点84% similar
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