American txheem h - bews (}-}-
Superior zog - rau - qhov hnyav ratio yog qhov zoo sib xws. W {{3} duab}}} duab, tshwj xeeb, muaj cov dav dav dav thiab tshuab hluav taws xob ntxiv rau ntawm tus ntoo khaub lig ntau dua ntawm tus ntoo khaub lig- seem. Qhov kev tsim qauv no me me rau cov khoom siv thaum ua kom tiav thauj khoom {{}} cov kabmob muaj peev xwm. Piv txwv li, W18 × 76 (18 ntiv tes siab, 76 LB / FT) muaj peev xwm ua rau muaj kev sib npaug nrog cov khoom lag luam me me)
Cov qauv txheem thiab kev pom zoo underpin lawv txoj kev ntseeg tau. ASTM Cov Qauv (piv txwv li, ATTM A36, A572) yuam kev nruj me ntsis rau qhov ntev, tshuaj lom neeg muaj tshuaj lom neeg, thiab cov khoom siv mechanical, thiab cov khoom siv. Qhov no ua kom pom tseeb tias w10 × 39 los ntawm ib lub zeb ua ib qho cim rau tib lub cev los ntawm lwm qhov, txo cov kev pheej hmoo engineering. Cov ntawv cog lus thiab cov ntaub pua av tau txais txiaj ntsig los ntawm kev sib tw ntawm 0.26% Max, tuaj yeem wel}}}, tuaj yeem welhnessing li 1 nti, streamlining rau ntawm lub xaib sib dhos.
Tus nqi - ua hauj lwm zoo rau cov siab los ntawm high- heev ntim ntau lawm. Mills hauv Asmeskas (piv txwv li, nucor, arcelormital Asmeskas) tsim muaj ntau dua 5 lab tons ntawm w} duab ib - cov nqi hauv tsev. Piv rau importeded h - cov kab hlau, tseem ceeb rau cov khoom lag luam steel) thiab txo cov txheej txheem txhuas xws li kev nthuav dav hauv tsev kho mob lossis cov ntaub ntawv chaw ua haujlwm.
Tsim cov ntawv sau yooj yim rau ntau daim ntawv thov. W {{1} Daim duab yog sib npaug ua ke (big cug loads) thiab cov nqaj (tawm tsam qhov xav tau ntawm cais cais. Hauv chaw muaj kev muaj, lawv qhib cross -}} seem yooj yim dua cov khoom siv (cov kav dej, cable) los ntawm lub vev xaib, txo cov roj av. Piv txwv li, nyob rau hauv lub tsev rau khoom, W12 × 50 ci ntsa iab nrog 12.1 {{} nti flange rau cov qauv siv ua ntej kom tsis muaj kev cuam tshuam cov qauv txheej txheem.
Compatibility nrog rau North American cov lis dej num yog lwm cov txiaj ntsig tseem ceeb. American Standard h- Beads dlhos nrog cov qauv tsim qauv qauv zoo li cov qauv txheej txheem tsim qauv thiab cov ntsiab lus txuas txuas rau W, S, thiab m puab. Qhov kev sib xyaw ua ke no ua rau kom ceev engineering li engicessing engicering {4 4}}- duab rau 25-taw kev ncua, zam kev kev ntsuas kev cai.
Hauv cov ntsiab lus, lawv txoj kev sib xyaw ua ke, thiab tus nqi {{} Cov khw muag khoom siv rau American Standard Center, uas siv W14 × 99 Beams hauv nws cov qauv tseem ceeb.