Flange thickness ncaj qha cuam cuam tshuam cuam tshuam being rawnance - tuab flanges txhais tau tias muaj peev xwm ntau dua. Lub Heb 300 × 300 nrog 15 hli flanges resistions 25% ntau dua khoov rau lub sijhawm dua ib nrog 10 hli flanges (tib qhov siab / web). Piv txwv li, hauv kab kab hauv pem teb thib 10 meters, 12 hli flanges txhawb 5 kn / m² thauj khoom, thaum 16mm flanges kov 8 kn / piv txwv, muaj mezzanines). Nyias flanges (8-10mm) ua haujlwm rau lub teeb lub teeb (thaj chaw nyob hauv qab), tab sis cov kev pheej hmoo buckling nyob rau hauv cov khoov hnyav. Cov qauv zoo li ISO 6892-1 qhia qhov tsawg kawg nkaus flange tuab (t ntau dua los yog sib npaug ntawm B / 20, B= flange dav) kom ntseeg tau tias muaj kev ruaj khov. Cov kws ua tshuab ua kom tuab raws li cov tuab tuab raws li luv thiab thauj khoom, ntsuas lub zog thiab tus nqi.
Vim li cas h - ci nrov nrov hauv cov neeg laus Asmeskas kev lag luam?
Kev loj hlob neeg Asmeskas (Nigeria, South Africa, Ethiopia) nyiam h} ci rau kev loj hlob sai. Nigeria (2 lab tons / xyoo) siv lawv hauv chaw ua si (Lags Free Zone, HW 50 25 ×} × 500 ci ntsas). South Africa (1.8 lab tons / xyoo) xav tau h {luas × 200 kab corrosive (corrosion {{tiv thaiv galvanized nqaj). Ethiopia (1 lab tons / xyoo) siv lawv hauv Addis Ababa teeb kev tsheb ciav hlau (HEb 300 × 300 cov teeb ua vaj tsev. H - Beams 'Nqis (vs.
Corrosion cuam tshuam h - nqaj ua haujlwm, thiab yuav ua li cas tiv thaiv nws?
Corrosion erodes h - nqaj hla {}}}}}}}% tom qab 5 xyoos hauv ntug hiav txwv. Piv txwv li, tsis muaj kev tiv thaiv s235 h - bews poob 1-2mm thickness xyoo nyob rau hauv cov kev pheej hmoo ua tsis tiav. Kev Tiv Thaiv Cov Kev Tiv Thaiv muaj xws li kub - dip txheej corrosization (85μm Zinc txheej (}} Hauv cov phiaj xwm ntawm ntug dej, cov anodes ua kom ntxiv rau cov pob qij txha tseem ceeb. Kev kuaj mob tsis tu ncua (kev kuaj sim) kuj tseem pab txheeb xyuas lub corrosion, kom pom kev ua tau zoo ua tau raws li EN 10025 Durabils.
Dab tsi siv ua h - kab teeb muaj nyob rau hauv cov tsheb thauj neeg?
H - Beams yog dav siv hauv kev thauj mus los (H24 × 1000 × Nyob rau hauv ports, hm 400 × 300 Txoov teeb crane rearts, tuav 100+ tuj ntim nqa. Lawv cov neeg nkees tsis kam (2 × 10 teev cov tsheb thauj khoom tsis ua tiav) suits tsheb ciav hlau ntau, thaum lub sij hawm Symmetrical kom ntseeg tau tias lub zog uas tsis muaj zog. Rau URBan subways, HW 300 nqaj 300 Beams txhawb txuas cov kab, tiv thaiv av siab thiab cov seismic ua si.
Qhov twg European lub teb chaws xav tau feem ntau h- cis, thiab vim li cas?
Lub teb chaws Yelemees, Tebchaws Askiv, thiab Fabkis yog Top European h- nqaj cov neeg siv khoom. Lub teb chaws Yelemees (5 lab tons / xyoo) siv h {3} tsov ntxhuav ntug dej (hn 300 × 150 nqaj rau los ua ke kab). UK (3 lab tons / xyoo) xav tau lawv rau cov khoom siv hluav taws xob (London hla kev, siv W18 × 35 nqaj) thiab chaw nyob. Fabkis (2.5 lab tons / xyoo) siv h {ge}} cov kab nrawm nrawm (tgv kab xev Txhua peb qhov ua ntej tshaj plaws en {{18} Txheem h} duab rau kev ruaj khov (30% rov ua dua tshiab cov ntsiab lus hlau) kom tau raws li EU ntsuab cov hom phiaj.
