Cov hluav taws xob hluav taws xob (cov xaim hluav taws xob hauv av) feem ntau yog ua los ntawm cov hlau, hos xob laim yog ua los ntawm tooj liab (lossis qee zaum nyiaj). Ib tug xob laim taw tes rau saum ntuj, thaum lub teeb hluav taws xob txuas tus pas nrig mus rau ib daim phiaj hauv av. Thaum lub caij ntuj nag xob nag cua, xob laim tawm ntawm lub ntuj los ntawm tus pas nrig thiab tus neeg xyuas pib mus rau hauv daim phiaj faus, yog li dissipating qhov kev tawm tsam thiab tiv thaiv cov tsev lossis khoom siv.
Cov khoom siv no tau siv dav hauv cov qauv xws li cov tsev, cov khoom siv hluav taws xob hloov hluav taws xob, cov khoom siv hauv tsev, thiab cov kav xa hluav taws xob.
Hluav taws xob conductors poob rau hauv ob pawg loj raws li tus ntoo khaub lig-sectional shape: round thiab flat. Lawv raug cais ntxiv los ntawm kev sib xyaw ua ke ntawm cladding thiab hauv paus hlau-xws li lead-clad steel, lead-clad tooj liab, thiab tooj liab- clad steel.
Cov hlua hluav taws xob tau teeb tsa rau ntawm qhov siab- cov tsev nce siab, chimneys, lossis cov roj cia tso tsheb hlau luam thiab txuas nrog cov txheej txheem hauv av los ntawm nqes- cov neeg siv hluav taws xob (feem ntau xob laim). Kev sib dhos pas nrig muaj tus pas nrig nws tus kheej thiab cov khoom siv mounting. Cov pas nrig taub feem ntau yog ua los ntawm cov hlau tsis muaj steel, thaum lub cev pas nrig siv tooj liab-clad steel puag ncig bar lossis steel yeeb nkab ua cov khoom siv hauv paus.
Ib txoj hlua tiv thaiv xob laim (lossis band) yog hais txog tus neeg xyuas pib uas tau teeb tsa nyob rau hauv cov cheeb tsam uas muaj kev cuam tshuam los ntawm xob laim, xws li lub ru tsev ridges, gables, qhov cua ducts, thiab cov npoo ntawm lub ru tsev tiaj tus. Rau thaj chaw loj lub ru tsev, siv cov hlua tiv thaiv xob laim (daim phiaj) hloov. Cov tshuab no tiv thaiv lub tsev sab nrauv sab nrauv los ntawm kev puas tsuaj los ntawm xob laim. Galvanized round steel los yog ca hlau yog pom zoo rau meshes thiab strips; Hloov steel yog nyiam, nrog qhov tsawg kawg nkaus txoj kab uas hla ntawm 8 hli, thaum lub tiaj tiaj steel yuav tsum muaj tsawg kawg yog 12 hli dav thiab 4 hli tuab. Cov hluav taws xob hluav taws xob kuj tseem siv tau rau kev tiv thaiv xob laim ntev - nrug siab - cov kab hluav taws xob hluav taws xob; galvanized steel strands nrog ib tug ntoo khaub lig- seem cheeb tsam tshaj 35 mm² yog pom zoo rau overhead xob laim conductors thiab meshes.