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摘抄一段小知识:
居民楼建6层就不建了是因为7层以上必须装电梯;
建11层是因为12层就要开始装两部电梯了;
建18层是因为19层以上的住宅,要有两个安全出口;
最高到33层左右,因为层高高于100米的建筑要建直升机停机坪。 twitter.com/0792z/status/12060

t.me/private_channel_c14370a/3

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