Gawo lopanda kanthu ndi chinthu cha geometry inayake yopangidwa ndi chitsulo kapena chitsulo ndi zinthu zomwe zimakhala ndi mphamvu zinazake komanso zolimba (monga pulasitiki, aluminiyamu, magalasi, ndi zina zotero) mwa kugubuduza, kutulutsa, kuponyera ndi zina zotero. Kuphatikizapo ngodya zitsulo, chitsulo chatchanelo, I-beam, square steel, H-beam, etc. ndi chinthu cha geometry inayake yopangidwa ndi chitsulo kapena chitsulo ndi zinthu zokhala ndi mphamvu ndi kulimba kwina (monga pulasitiki, aluminiyamu, ulusi wagalasi. , etc.) pogubuduza, extrusion, kuponyera ndi zina zotero. Kuphatikizira ngodya chitsulo, njira zitsulo, I-mtengo, lalikulu zitsulo, H-mtengo, etc.