designing with floor joist span tables
做 没适应 也担心会做错 所以慢点 开始也觉得做正常joists可能会更快
house would look like the picture below (with all floor joists 2
the first floor▼厨房,kitchen▼裸露的天花板搁栅,ceiling joists
long span roll-formed light gauge steel roof truss floor joist
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