[单选题]单层厂房跨度小于18m时,应采用的模数数列是( )

A、30M
B、60M
C、15M
D、6M

参考答案： A

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● 当单层厂房的跨度＞18m时，其跨度尺寸应取扩大模数（）数列。
● 确定单层厂房跨度的尺寸时，应符合模数协调的标准，当厂房跨度≤18m时，跨度尺寸应取扩大模数（）数列。
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