RT
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http://www.spanman.net/Members/purlin-single-span#
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150Cee purlin is struggling to do the job. Also, you need a edge beam to pick up the purling. Suggest you to install three post and use 200Cee purlin for 7.5m span. Have u engage a structural engineer to design for you?:
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您是说建议用200的purlin？我见过学校用purlin做柱子。
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PFC 和轻钢你能分得清吧。7.5m purlin, you need to check the wind load up and down pressure. I do not think the table you attached is correct for you to use.
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这个真不懂，还请赐教
https://www.stratco.com.au/custo ... ns-girts-design.pdf
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这个没法教你的。PFC 又称channel,是结构槽钢。轻钢就是Cee purlin or Z purlin,主要用在房顶的rafter 上。这个purlin的间距大概1.2米左右。尺寸大小和间距主要看风载。一句话两句话是说不清楚的。我们干了20多年工程师都不敢乱说的。
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感谢分享！是轻钢，比这种结实
https://www.bunnings.com.au/absc ... le-carport_p3310291
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