Chaw nres tsheb qhov rooj struts stiffen qhov rooj seem kom tiv thaiv lawv los ntawm kev khoov lossis tawg.Lawv kuj tso cai rau lub qhov rooj qhib thiab kaw kom du.Yog tias cov ntu tsis nruj, lub qhov rooj qhov rooj yuav khi thaum nws qhib thiab kaw.
Feem ntau cov qhov rooj hauv tsev siv 2 "struts, tab sis cov vaj tse thiab cov qhov rooj muaj qhov siab tshaj 16 ko taw dav feem ntau siv 3 "struts.Struts feem ntau yog ob nti luv dua qhov dav ntawm qhov rooj.
L-shaped hlau reinforcement cov tswv cuab txuas kab rov tav rau sab hauv ntawm qhov chaw nres tsheb qhov rooj kom ntxiv dag zog thiab rigidity.Nws kuj hu ua trusses.
