Tag nrho cov khoom hlau yuav tsum tau galvanized; yuav tsum tau saib xyuas los tiv thaiv txheej txheej galvanized thaum ua haujlwm.
Lub taub hau yuav tsum yog ua los ntawm galvanized steel yeeb nkab, nrog rau phab ntsa thickness tsis tsawg tshaj li 3 hli. Lub tin -coated ntev ntawm rab koob yuav tsum tsis pub tsawg tshaj 70 hli.
3. Cov kev tiv thaiv xob laim yuav tsum tau nruab ntsug thiab ruaj ntseg. Qhov tso cai sib txawv rau verticality yog 3/1000.
Vuam qhov yuav tsum tau ua: Vuam yuav tsum tau ua los ntawm txoj hlua vuam, thiab lub ceg ntev yuav tsum ua raws li cov hauv qab no:
Rau cov hlau tiaj tus, nws yuav tsum yog ob zaug nws qhov dav (nrog tsawg kawg 3 npoo welded).
Rau cov hlau puag ncig, nws yuav tsum yog 6 npaug ntawm nws txoj kab uas hla.
Thaum txuas cov hlau puag ncig thiab cov hlau tiaj tus, qhov ntev yuav tsum yog 6 npaug ntawm txoj kab uas hla ntawm cov hlau puag ncig.
Kev tiv thaiv xob laim feem ntau yog ua los ntawm cov hlau puag ncig lossis cov yeeb nkab steel, thiab lawv txoj kab uas hla yuav tsum tsis txhob tsawg dua li cov hauv qab no:
Kev ywj pheej xob tiv thaiv yees feem ntau siv galvanized round steel nrog txoj kab uas hla ntawm 19mm.
Ruoftop xob tiv thaiv yees siv galvanized steel yeeb nkab nrog txoj kab uas hla ntawm 25mm.
Hluav taws xob tiv thaiv yees rau saum cov dej yees siv galvanized steel yeeb nkab nrog txoj kab uas hla ntawm 25mm lossis 40mm.
Lub qhov hluav taws xob tiv thaiv ntauwd nyob rau sab saum toj ntawm lub chimney yuav tsum tau ua los ntawm galvanized round steel nrog ib txoj kab uas hla ntawm 25mm los yog galvanized steel yeeb nkab nrog ib txoj kab uas hla ntawm 40mm. Lub nplhaib tiv thaiv xob laim yuav tsum yog ua los ntawm galvanized round steel nrog txoj kab uas hla ntawm 12mm lossis galvanized ca steel nrog tus ntoo khaub lig-section ntawm 100mm thiab thickness ntawm 4mm.
Kev tiv thaiv hluav taws xob ntauwd yuav tsum zoo dua yog ua los ntawm cov hlau puag ncig lossis welded steel yeeb nkab, thiab nws txoj kab uas hla yuav tsum tsis txhob tsawg dua li cov txiaj ntsig hauv qab no: Rau rab koob ntev dua 1m: 12mm rau cov hlau puag ncig, 20mm rau cov yeeb nkab steel; rau rab koob ntev ntawm 1-2m: 16mm rau round steel, 25mm rau steel yeeb nkab; rau koob rau saum lub chimneys: 20mm rau round steel, 40mm rau steel yeeb nkab.