Txawm hais tias kev nqis peev rau hauv kev tsim kho vaj tse thoob ntiaj teb tab tom nce siab hauv North America, Latin America, thiab Southeast Asia, qhov kev lag luam thoob ntiaj tebASTM H Beamtseem yog cov hlau uas nrov tshaj plaws siv rau kev tsim kho vaj tse, kev lag luam, thiab kev tsim kho vaj tse. Nws muaj kev thauj khoom siab, ruaj khov zoo thiab ua tau raws li tus qauv Asmeskas. Nws siv dav hauv cov tshuab tsim kho uas muaj kev ua tau zoo thoob plaws ntiaj teb.
Cov yam ntxwv kho tshuab ib txwm muaj (txawv ntawm qib):
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Lub Zog Tawm: 250–345 MPa (36–50 ksi thiab siab dua)
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Lub zog tensile: 400–550 MPa
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Kev vuam zoo heev thiab kev ua tau zoo
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Muaj zog tiv taus kev khoov thiab kev sib txhuam
Lub H-shaped cross section qhia txog:
1. Qhov siab tshaj plaws ntawm seem modulus
2. Kev faib khoom zoo
3. Txo kev siv hlau piv rau cov I-beams ib txwm muaj
4. Kev ua tau zoo tshaj plaws hauv cov xwm txheej av qeeg thiab cua ntsawj
Cov Tsev Lag Luam thiab Kev Lag Luam
Cov Haujlwm Tsim Kho Vaj Tse
Cov Tsev Siab thiab Ntau Zaj Dab Neeg
Chaw Nyob
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Xov tooj
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Lub sijhawm tshaj tawm: Lub Ob Hlis-28-2026