Unverified82% confidenceDecision RuleTime unknown
钢制层板长度超过90cm时中部易下垂，单层跨度＞90cm应选带背拉杆或中间加立柱的结构，否则承重后中间下沉2-3cm
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82%
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Long-term
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Unverified挂杆跨度超过90cm且无中间支撑时，圆管挂杆易弯曲，应选椭圆形铝合金挂杆（截面约30x15mm）或增加中间吊码，跨度＞120cm必须分段82% similarUnverified层板跨度越大越容易下弯，宽度超过80cm的单层建议中间加立柱支撑或选加厚层板（钢≥1.0mm、木≥18mm），否则放重物必然弯曲82% similarUnverified承重不足的层板放置多台主机+功放会下弯变形，木质层板跨度超过60cm且承重需求>15kg时应选钢制层板或加中间支撑，钢化玻璃层板注意标称承重多为均布承重非点承重82% similarUnverified隐形悬浮搁板（无支架款）单板长度超过80cm时，内部预埋钢筋直径需≥10mm且插入墙体深度≥8cm，否则搁板末端会明显下垂81% similarUnverified无边框薄板层板（如3mm钢板）横向跨度超过40cm时中间易下弯变形，长跨度置物需选带加强筋或折边≥15mm的层板80% similar
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