求教各位修建巨匠，用150的PURLIN建一个7.5X7.5的车棚单边两个立柱仍是三个立柱？

woovi

RT

skywarrior

http://www.spanman.net/Members/purlin-single-span#

waji_42

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?:

零丝残绪

您是说倡议用200的purlin？我见过学校用purlin做柱子。

zhl1981221

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.

moonlight

这个真不懂，还请赐教

https://www.stratco.com.au/custo ... ns-girts-design.pdf

99yzy

这个没法教你的。PFC 又称channel,是构造槽钢。轻钢就是Cee purlin or Z purlin,次要用在房顶的rafter 上。这个purlin的间距大略1.2米摆布。尺寸大小和间距次要看风载。一句话两句话是说不分明的。咱们干了20多年工程师都不敢乱说的。

萧萧而下

感激分享！是轻钢，比这类牢固

https://www.bunnings.com.au/absc ... le-carport_p3310291